bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of a Cutting Point Control Algorithm for Five-Axis Machining
Authors: She Chen Hua , Yang Tsung Hua
Published: December 2012

Five-axis machine tool with two additional rotary axes has been widely used in defense, aerospace and the consumer industries, and is an important process of precision manufacturing. Traditional five-axis program depends on the machine tool’s configuration and machining setting. This leads to inconvenience of reprogramming five-axis NC code for the end users. This paper proposes a cutting point control algorithm for five-axis machining. Although the commercial advanced controllers provide this function, they are very expensive and restricted to export. The developed algorithm can be embedded to the PC-based controller so that the specific cutter location data can be transformed and employed easily for different cutting tools. Verification using VERICUT solid cutting simulation software demonstrated the correctness of the generated cutter location data.
An Experimental Study on Cycle Performance of the Mobile Air Conditioner with and without Indoor Fan Operation
Authors: Park Youn Cheol , Kim Jongwoo
Published: December 2012

Operating characteristic of an air conditioning system for vehicle is dynamic and anomalous. Due to the dynamic behavior of the system, the performance measurement should be taken in account in many different kind of environmental condition with various thermodynamic variables. One of the driving conditions of the system, rotating speed of the compressor for air conditioning is the most important factor consideration that is directly connected to the vehicle engine through clutch and belt. The engine was simulated with 18.5KW class AC motor to drive the compressor. Two environmental chambers are built in this study to simulate operation condition of the system.
A Comprehensive Approach for Resistance Spot Welding Quality Estimation Using Dynamic Resistance Based Model
Authors: El Ouafi A. , Belanger R. , Guillot M.
Published: December 2012

On-line quality assessment becomes one of the most critical requirements for improving the efficiency of automatic resistance spot welding (RSW) processes. Accurate and efficient model to perform non-destructive quality estimation is an essential part of the assessment. Besides the usual welding parameters, various measured variables have been considered for quality estimation in RSW. Among these variables, dynamic resistance gives a relative clear picture of the welding nugget formation and presents a significant correlation withseveral RSW quality indicators. This paper presents a structuredand comprehensiveapproach developed to design an effective dynamic resistancebased model for on-line quality estimation in RSW. The proposed approach examines welding parameters and conditions known to have an influence on weld quality, and builds a quality estimation model step by step. The modeling procedure begins by examining, through a structured experimental design, the relationships between welding parameters, typical characteristics of the dynamic resistance curves and multiple welding quality indicators. Using these results and various statistical tools, different integrated quality estimation models combining an assortment of dynamic resistance attributes are developed and evaluated. The results demonstrate that the proposed approach can lead to a consistentmodel able to accurately and reliably provide an appropriate estimationof the weld quality under variable welding conditions.
Multi-Axle Electro-Hydraulic Control Steering System Based on Servo Solenoid Valve
Authors: Du Heng , Wei Jian Hua , Hu Bo , Fang Jin Hui
Published: December 2012

The turning load resistance torque of large wheeled vehicles is very big and these vehicles are all the multi-axle vehicles. It is important to select the suitable steering system. In the multi-axle vehicle steering system, EHPS is the most appreciate driving mode in all of them including MS, HPS, EHPS, EPS, etc. In order to improve the performance of the present EHPS with proportional valve, the new EHPS with servo solenoid valve was designed. The static and dynamic characteristics of servo solenoid valve are much better than proportional valve, such as dead band, hysteresis and frequency response. Firstly, the single-axle electro-hydraulic servo steering system was introduced including hydraulic system and electronic control system. Then multi-axle electro-hydraulic servo steering system with coordination control strategy was introduced. The designed multi-axle steering system with servo solenoid valve makes it possible to improve the steering performance significantly.
Finite Element Resistivity Forward Modeling Using Algebraic Multigrid Preconditioned Conjugate Gradient Method
Authors: Zou Gui Hong , Liang Hua Qing
Published: December 2012

An algebraic multigrid by smoothed aggregation preconditioned conjugate gradient method is developed to solve the liner system arising from 3-D direct current finite element resistivity forward modeling. The algorithm combines the efficiency of algebraic multigrid method and the stability of conjugate gradient method. Algebraic multigrid by smoothed aggregation keep in high-efficiency while simulation using local quasi-uniform mesh and its convergence effect will reduce while numerical modeling using anisotropic stretched grids. However tensor product non-equidistant mesh, a kind of anisotropic stretched grids, is often used in 3-D direct current resistivity forward modeling. In order to improve this situation, a factor is added to guide correct aggregation. Consequently, a typical example is used to prove that the improvement is the right. Finally, it is natural to conclude that the algorithm suggested in this paper is efficient and robust whether simulation using local quasi-uniform mesh or tensor product non-equidistant mesh
Numerical Simulation Studies on Surface Erosion of Transmission Line in Sand and Dust Conditions
Authors: Hua Guang Ru , Lu Xin , Xiao Qiang , Wang Hai Yang
Published: December 2012

In order to reveal the characteristics of surface erosion of transmission line in sand and dust conditions in the northwest of China, an approach of simulating sandstorm flow field and impact on transmission line is proposed. Based on FLUENT model of two phase flow, the velocity flowing around the line and impacting direction between sand and line are analyzed. Simulation results show that the maximum sustained wind speed amounts to 20.9m/s at up and down side of line when the air velocity keeps at 15m/s. The simulation of impacting process based on LS-DYNA shows that the maximum displacements are 0.45×10-3mm, 4×10-3mm and 10×10-3mm and maximum stresses are 0.25Mpa, 7MPa and 16MPa in the three processes which sand size is 0.25mm, 0.50mm and 0.75mm respectively.
Fracture Finite Element Analysis for Roll Forming of U Section Parts of TRIP 600 Steel
Authors: Guan Yan Zhi , Li Qiang , Yan Yu
Published: December 2012

By applying the shear damage criteria, facture occurrence for roll forming of U Section parts of TRIP 600 steel is analyzed with nonlinear finite element. In accordance with the maximum value of steel sheet of plastic strains for the fracture initiation and with the application of the element deletion technology of the ductile fracture, the calculation of the damage evolution parameters of the material fracture is successfully set up. By applying the explicit dynamic solution method, the fracture finite element analysis of TRIP600U type section roll forming is realized, and the relationship among the stress, strain, energy density as well as damage evolution and material fracture is obtained.
Optimization of Elastic Supports for Laminated Composite Plates
Authors: Kong Jackson
Published: December 2012

The fundamental frequency of a plate can be raised by placing appropriate number of rigid supports at various optimal locations along the nodal lines of vibration modes, as previously shown by other researchers. Unlike previous works, however, the present study aims to determine the optimal locations and the corresponding minimum stiffness of elastic spring supports using a direct search optimization method, presuming that the nodal lines of vibration modes can be identified a priori. As examples of applications, the optimal locations and stiffness are determined for isotropic plates and laminated composite plates with various lamination schemes, results of the latter are presented for the first time in open literature. Although only plates with regular geometry are treated in this preliminary study, further extension to plates with irregular geometry and other boundary conditions is being carried out.
Transient Plasma Ignition for Delay Reduction of Ethene-Air Mixtures
Authors: Duan Li Wei , Hong Yan Ji
Published: December 2012

The paper presents the results of transient plasma ignition for delay reduction of quiescent ethane-air mixture. The transient plasma was produced by repetitive pulses nanosecond discharge, 30 kV peak voltage, 70 ns pulse width and 2 kHz repetition rate. The effects initial conditions including equivalence ratio (RE=1), temperature of 300K, and pressure range of 50 to 200 kPa were evaluated. The ignition delays were reduced by up to 50% when compared to conventional capacitive discharge systems.
Leaching of Heavy Metals from Municipal Solid Waste Incineration (MSWI) Fly Ash Using Nitric Acid
Authors: Zhang Hai Ying , Ma Guo Xian
Published: December 2012

The presence of heavy metals in municipal solid waste incineration (MSWI) fly ash is of environmental concern due to their leaching potential in landfill environments. Acid extraction is a conventional method of safe treatment of fly ash. In this work, nitric acid was used as the extraction acid to leach Ni, Zn, Pb and Cu out from the ash. In addition, influence of nitric acid concentration and liquid to solid ratio on removal ratio of the four heavy metals was studied. It was found that removal ratio followed the decreasing sequence of Pb > Cd > Cu > Zn for acid extraction using nitric acid. The optimal extraction condition was 5.3 mol/L of nitric concentration at 20 liquid to solid ratio, which resulted in a removal ratio of 98% for Pb, 86% for Cd, around 73% for Cu and around 42% for Zn.
Surface Plasmon Interference with Two-Slit Metal Structure
Authors: Duan Gao Yan , Song Gang , Yu Li
Published: December 2012

We present a kind of surface plasmon interference phenomenon in two-slit structure. The simulation results show that the interference phenomenon will become more obvious for the two-slit structure with -shape slit than for the one with T-shape slit. And the interference effects can be improved by increasing the width of -shape slit shoulder. These results will be useful to design novel surface plasmon-based optical devices.
The Investigation of Terahertz Metamaterials by Normalized Power Transmission
Authors: Luo Jun , Chen Ying , Kang Sheng Wu , Zhang Xin Yu , Xie Chang Sheng , Zhang Tian Xu
Published: December 2012

We present the design and fabrication of metamaterials, and investigated the normalized power transmission properties of four metamaterials at different frequency in terahertz regime. We compared the power transmission performances of four types of metamaterials microstructures, and analyzed their transmission differences.
Investigation on Impact Performance of Light-Weight Composite Honeycomb Sandwich Panels
Authors: Yutaka Iwakawa , Machida Takahisa , Kobayashi Mitsuo , He Jian Mei
Published: December 2012

In this study, the relationship between the impact performances of light-weight honeycomb sandwich composite panels with design parameters like panel cores and face’s thicknesses and materials, honeycomb foil thickness and cell size etc. are experimentally evaluated through the spindle falling tests. Analytical approaches are also carried out to confirm the validity of the experiments based on 3D modeling and using ANSYS LS-DYNA software. Comparisons of the experimental and analytical results are reported in this study.
Nondestructive Reliability Monitoring of Zirconia Degraded under Hydrothermal Condition
Authors: Choi Chan Yang , Byeon Jai Won
Published: December 2012

3%yttria-stabilized tetragonal zirconia polycrystal (3mol% Y2O3-ZrO2, 3Y-TZP) ceramic suffers from low temperature degradation (LTD) during long time use under hydrothermal condition. In this research, an attempt was made for monitoring hydrothermal degradation of the ceramic by using semi-nondestructive X-ray diffraction (XRD) method. In order to simulate accelerated hydrothermal degradation, the specimen was placed under water vapor atmosphere at 134°C, 150°C, and 200°C in an autoclave for various exposure time up to 40 hours. From the X-ray diffraction peak, two feature parameters including intensity ratio and full width at half maximum were determined and observed to increase with hydrothermal exposure time and temperature. The consistent changes in XRD parameters were correlated with the tetragonal-to-monoclinic microstructural change. Based on the established linear correlations with hardness reduction, potentials of the two XRD parameters were suggested for health-monitoring of the hydrothermally exposed 3Y-TZP ceramic.
Interaction of High Power Laser with Carbon Doped PVC
Authors: Wang Dian Kai , Hong Yan Ji
Published: December 2012

To measure the propulsion characters of PVC(poly vinyl chloride) doped with carbon ablated by high power density laser, torsion pendulum is used to measure the micro impulse. Laser interference is used to detect the vibration of the pendulum which is caused by the ablating jet. The measurement error is 2.6 according to the calibration. Nd:YAG laser is used as the laser source. Mettler-Toledo XS105DU analytical balance is used to measure the ablated mass. The results indicate that the performance of PVC+2C is better as an alternate target. Both the specific impulse(Isp) and energy transforming efficiency() increase with laser power density(I0), while momentum coupling coefficient(Cm) decreases. The maximum measured Cm is 557N/W. Isp and  reach to 204s and 46 respectively.
Reproduction of Vehicle Vibration by Acceleration-Based Multi-Axis Control
Authors: Nagai Nobuyuki , Hashimoto Seiji , Fujikura Yoshimitsu , Takahashi Jyunpei , Kumagai Shunji , Kasai Makoto , Suto Kenji , Okada Hiroaki
Published: December 2012

This paper presents the development of the 3-axis vibrating machine precisely reproducing vehicle's acceleration characterized with multi-mode vibration. For the reproduction in vertical axis, at first, the system identification experiment of the vibrator is carried out. Using the identified model, the feedforward control based on the pole-zero cancellation method is applied to realize the ideal transfer gain of one from the acceleration reference to its output. Next, for reproducing the acceleration in horizontal plane, the continuous-path tracking (CPT) control system is constructed using the precision XY stage. In the CPT control system, the disturbance observer is introduced focusing on the accurate reproduction within limited frequency. Finally, the experimental verification of the proposed 3-axis acceleration vibration reproduction system is shown using the developed DSP-controlled 3-axis vibrating machine.
Study on the Relationship between Clamping Cylinder and Gripping Mechanism Clamping Force of Forging Manipulator
Authors: Dai Min Qiang , Zhao Sheng Dun , Cai Wei
Published: December 2012

The paper firstly built a mode of a forging manipulator gripping mechanism. Then the clamping fore, connecting rod force and clamp arm force of which were calculated by the static analysis function of Pro/Engineer. Finally, conclusions were made based on the results analysis of the data processing which were fitted in MATLAB.
All-Electric Subsea Production Control System
Authors: Yu Jia , Zhao Hong Lin
Published: December 2012

All-Electric Subsea Production Control System, which has many advantages over conventional Multiple Electric-hydraulic control system, is the development tendency of subsea production control system. Being based on principle of all-electric control system, its advantages, working principle and key technologies were analyzed in this paper, which could be a reference for further study.
Study of Active Suspension Based on Fuzzy Neural Network Control
Authors: Yuan Chuan Yi , Teng Ye Fang , Yin Xin Ye
Published: December 2012

Based on the established full-car active suspension model, fuzzy control theory was combined with neural network control, the fuzzy neural network control system of vehicle active suspension was designed, simulation and analysis of random road input and sine wave input were carried on. The results show that, by comparison with the traditional suspension system, the peak and standard deviation of vehicle mass vertical acceleration decreased by 55.38% and 59.04%, the peak of vehicle mass vertical acceleration decreased by 49.96% when vehicle go through the sine wave at the speed of 5m/s, the ride comfort was improved obviously.
Application of Rough Set-Neural Network System in Bearing Fault Diagnosis
Authors: Zhou Tian Pei
Published: December 2012

To the shortcomings of neural network in fault diagnosis, such as multiple input dimensions and the huge amount of data, some reductions from data based on rough sets theory are derived and unessential attributes were eliminated, an optimized rough set-neural network intelligent system was established. Through analyzing for instance, the time of fault diagnosis can be reduced by using the system, and a new idea was provided to diagnosis of high reliability equipments.
The Calculation Method Study in the Bearing’s Assembly Process Using ABAQUS
Authors: Zhou Yu Shi , Liu Lin , Zheng Yu Qing
Published: December 2012

This paper describes the selection of calculation method of ABAQUS software in the bearing’s assembly process through the establishment of the engine body, the bearing cap, the bearing and other parts of the three-dimensional FEA model [1], using three different loading methods of main bearing over surplus and studying the application of the assembly process of marine diesel engine’s bearing calculation method.
Textile Pattern Design Based on IFS
Authors: Meng Guang Li , Yang Xu Hong , Li Dong Xia
Published: December 2012

In this paper, we studied the method of calculating IFS code and auto-generated the fractal images based on IFS codes. The IFS codes of the English alphabet were calculated respectively, and the fractal images were generated in accordance with the IFS codes by using the Visual Basic program, then textile patterns were designed with the fractal images.
Innovative Design Method of Pipe-Blanking Machine Based on Solidworks
Authors: Wu Fu Zhong
Published: December 2012

In order to improve the shortcomings of the existing machine, a new laser pipe-blanking machining is designed. A 3D optimization designing method of pipe-blanking machine is presented through using Solidworks software as a design platform. The simulation and verification of design results is realized by the virtual assembly of whole machine, interference checking and motion simulation of machining process. On the basis of the analysis of simulation results, the structure and capability of the product is further analyzed and optimized in order to achieve the best design.
Experimental Study on Metal Base Disrepair of Ladle Slide Gate System Based on Temperature/Stress Analysis
Authors: Guo Jing Jing , Chen Jian , Zhao Jian Guo , Gu Qun Guang , Wang Shu Huan
Published: December 2012

The indirect coupled modeling of the metal base disrepair has been carried out by software ANSYS. Results show that diagonal tensile stress is the main factor of crack, crack easily take place in the lower surface, where obviously exist a region of stress concentration in 45°direction. It should make symmetrical and uniform distribution as much as possible
Thermal Elasto-Plastic FEM Analysis of the New Heavy-Haul Freight Car Wheel Plate
Authors: Li Jin Liang , Xiao Nan , Huang Chang Wu , Fu Nian Jun
Published: December 2012

Increasing the axle loads is becoming one of the solutions to meet the increasing demands of transportation, which makes the wheel bear larger heat loads and suffer worse heat damage. Therefore, it is necessary to simulate the thermal stress of the 30 t axle-load wheel and reveal the influence law between the braking power and the thermal damage in order to support the design of operating and braking. And a new method that simulates the braking working conditions based on the results of the heat treatment is put forward. According to the thermal elasto-plastic theory, this paper simulates the distribution of the residual stress generated in the heat treatment process and the thermal stress of the residual deforming wheels using the time-history of the thermal braking power on Datong-Qinhuangdao railway, which is based on the real working conditions. The paper proves that the new 30 t wheel plate will bear larger thermal and residual stress and suffer more heat damage.
The Design Method of the Hyperbola Profile in the Impeller Meridional Plane of Engine Water Pump
Authors: Li Li Hong , Li Xiao Li , Chen Luo Zhong
Published: December 2012

At present, the profile in the impeller axial plane of the engine water pump is designed by using the method of the projection on the axial plane, which needs repeat calculation and plentiful and complicated works. The profile in the impeller axial plane is designed by the design method of the hyperbola profile according to the principle of the angle flow which follows liquid flow law. This way provides a simple and available method for the engineers that embark on the impeller design. It can avoid the complication of conventional way and save large amount of manpower and funds. The model is built by CAD and analyzed by CFD. The result shows that the reversed flows and the secondary flows are evidently reduced. At the same time, the experiment verified that the head and efficiency of the pump are improved distinctly.
Preparation of Hollow Sodalite/NiO Composite Spheres in Polyacrylamide Hydrogels
Authors: Han Li , Wang Qin , Guo Cun Biao , Xu Jun , Zhan Yu Zhong , Guo Shi Ling , Wang Jian Feng , Zhang Rui
Published: December 2012

In the absence of sphere templates, hollow sodailte/NiO composite spheres were obtained by one-pot hydrothermal synthesis by using polyacrylamide hydrogels as "soft template". And the effect of nickel oxide content on the synthesis of hollow complex spheres was studied. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX). The results showed that when the content of nickel oxide was about 0.5%, the hollow sodalite/NiO composite spheres with high crystallinity, stable crystal, and obvious hollow structure could be successfully synthesized.
Establishment and Application of an Equivalent Impact Model of Coupler in Front of Subway Locomotive
Authors: Cui Jin , Zhang Le Le , Tian Yong Feng , Zhang Xiao Yu
Published: December 2012

Coupler’s energy absorption part is made up of elastic buffer and crushing tube. Elastic buffer is used to absorb impact energy produced from locomotive’s normal running process while the crushing tube is used to absorb the ones produced from accidental impact process. It is one of key problems to solve in locomotive’s impact simulation process that to establish and manage the coupler’s equivalent model. The article simulates coupler’s absorbing of energy in impact process at two operating conditions. According to the relative energy absorption design standards, the article evaluates the correctness of the established coupler’s equivalent model. The simulation result indicates that the established coupler’s equivalent model satisfies the design requests.
DOE Applied to Optimization of Steel Casting
Authors: Gong Xue Dan , Liao Dun Ming , Zhou Jian Xin , Shen Xu
Published: December 2012

In this paper, DOE method is applied to scheme test plans for designing the casting processes with shrinkage volume information provided by InteCAST. The effect on casting defect by the setting of riser style, riser section, riser height, chill section, chill thickness were studied by the range analysis, and the influences degree of above five factors were compared by the variance analysis. The trend graphs of factor level are drawn to intuitively present the degree of importance of the factor. Optimal process parameters are obtained by using comprehensive analysis and comprehensive score method. A practical exemplification is shown to prove that the proposed method could help designer effeciently obtain a optimal feeding layout.
Electron Density Topological Analysis the Intermolecular Weak Interaction between GeH4 and X(X=He, Ne, Ar and Kr)
Authors: Liu Yan Zhi , Liu Yan , Tang Hui An , Yuan Kun
Published: December 2012

The intermolecular weak interaction between GeH4 and X(X=He, Ne, Ar, Kr) has been studied at MP2/aug-cc-pvtz level. Electron density topological properties of the studied systems have been calculated to investigate the critical points of H…X weak bonds. The molecules electrostatic potential (MESP) image is one of the tools for conformational analysis, and the related data suggests the view of the non-electrostatic weak interaction in nature of the GeH4…X(X=Ar, Kr) systems. To help possible experimental identification of the intermolecular weak interactions described in this work, the frequencies analysis and NMR properties were also calculated at MP2/aug-cc-pvtz level.
Surface Quality Effects Investigation of Micro-Grinding Soda-Lime Glass
Authors: Cheng Jun , Gong Ya Dong , Wu Zhi Zheng , Yan Xu Qiang , Zheng Wei Sheng
Published: December 2012

This paper presents a micro-grinding experiment on soda-lime glass to study the surface quality effective factors during micro grinding on hard brittle materials. The process of micro-grinding on soda-lime glass is showed in this paper and micro-grinding equipments are designed, fz(feed rate), ap (grinding depth), vg(Grinding speed) in micro-grinding brittle materials and their effects to surface quality have been discussed by experiments which were carried out on a desktop micro machine developed by NEU. Results proved that fz is the most important factor to the surface quality, and low surface roughness could be achieved by high vg and low fz in micro-grinding soda-lime glass.
Research on Cutting Performance of HSS Taps by Electric Enhanced
Authors: Wang Hui , Zhou Feng , Han Rong Di , Liu Yong Hong
Published: December 2012

After tool edges sharpen, there are a variety of micro-defects in the area of edge, which will accelerate tool wear and shorten tool life. In order to increase tool life and production efficiency, the area of edge strengthen was needed. In this paper, the electrolysis technology was used to enhance the cutting edge of high-speed steel(HSS) tap, the rounding of the edge region of the forming edge and surface morphology of cutting edge were investigated. And the tapping tests were carried on the Ti6Al4V. The results showed that electrolysis enhanced technology can eliminate the defects, invert a circular edge and improve the tool edge strength. The original tap was worn rapidly in the early stages of wear and the cutting force was changed big variation. The results showed that tap strengthened can reduce tool wear and improve tool life.
Influence of Reduction Agent of SSI on its Cadmium Removal from Wastewater
Authors: Li Jun Guo , Shi Yan , Bi Na
Published: December 2012

Spherical sponge iron (SSI) with high activity and intension could be prepared through direct reduction by charcoal or hydrogen. The capability of cadmium removal by SSI was investigated in. It was suggested that the reaction of SSI reduced by hydrogen was higher than that reduced by charcoal, and the increasing rate of pH and cadmium removal in solution by SSI reduced by hydrogen was higher than that reduced by charcoal. Moreover, cadmium removal percentage by SSI reduced with hydrogen was much higher than that reduced by charcoal. When the original concentration of cadmium was 50mg/L, cadmium removal by SSI appeared to be the pseudo-first-order reaction because the reaction order was from 0.861 to 0.984. The apparent reaction rate constant of cadmium removal by SSI reduced with charcoal was 0.586 h-1. While hydrogen was utilized as reduction agent, the apparent reaction rate constant of cadmium removal was increased by 7.3 and 13.7 times.
E-pH Diagram of Fe-N-H2O System and its Application in Nitrate Removal from Water by SSI
Authors: Li Jun Guo , Shi Yan , Wang Fan
Published: December 2012

Spherical sponge iron (SSI) with high activity and intension could be utilized to remove nitrate from wastewater. Reduction product of nitrate by SSI was investigated through static state experiment combined with E-pH diagram of Fe-N-H2O system. In a certain range of pH and redox potential, the speciation of iron include Fe0, Fe2+, Fe3+, Fe(OH)2 and Fe(OH)3, and the speciation of N was NO3-, N2, NH4+, or NH3 as the initial speciation of N was nitrate. pH in solution increased to above 10 in 6min because of quick erosion battery reaction of zero-valent iron in solution. Moreover, the E value in solution declined quickly to the minimum and then increased slightly because of dissolution of oxygen from atmosphere. It was suggested that nitrite was the intermediate product during reduction of nitrate by SSI, and ammonium was the finial product of nitrate and nitrite reduction. Nitrate removal from wastewater was related with escape of ammonia, which was gas state of ammonium in water, when the water solution was alkaline.
Analysis of Strength of Energy Storage Flywheel Rotating at a High Speed
Authors: Li Zhen , Jiang Tao , Bi Xiao Fang , Li Hong , Li Li
Published: December 2012

The technology of flywheel energy storage is already widely used in motorcar, electric power systems, spaceflight and martial fields. Decreasing the weight, increasing rotating speed and strength of the flywheel rotor and improving the energy storage efficiency of the flywheel are always attention-getting. In this paper, a flywheel energy storage is designed and finite element analysis is done to obtain the stress distribution of it before being produced. The maximum and variety of radial stress and circumferential stress are studied and the influence of composite material wrapped on flywheel rotating at high speed is discussed. Then the action of composite material to stress concentration around the small hole on the hub is thought about. The results of this analysis can prepare a valuable guide for flywheel energy storage at design and manufacture stage.
A Study on the Usage of Material Aesthetics in Car Design
Authors: Fu Li Ming , Sun Ming Yang
Published: December 2012

The purpose of this paper is to explore how the aesthetics of material is applied to car design. Based on a series of current material research with substantive examples, the paper will encourage car designers to be more experimental in their choice of materials and designs. It covers four physiologically sections including visual, tactile, auditory, and olfactory perceptions of materials. In addition, four typical case studies will showcase the present status and development trends of materials science within the automobile industry.
Designation and Simulation of Pressure Peak Measurement Appliance
Authors: Zhao Hao
Published: December 2012

Peak is one of the important parameters of pressure, so a pressure measurement appliance for peak based on FPGA and SCM is designed, including pressure sensor, sampling circuit, signals de-noising process, data processing and liquid crystal display circuit. The stress signals are converted into voltage by pressure sensor, and are sampled through high precision AD, then FPGA de-noising these signals through wavelet , last, signals are transformed to the micro-controller, peak value is got with the sampling data processed by SCM, and finally display peak value in LCD screen. The feasibility of the peak measurement appliance is verified according to the simulation by proteus.
Computer Accounting and Analysis System of Silk’s Weaving Process and Equipment
Authors: Lv Heng , Sun Xue Ke , Yang Xi , Feng Cen
Published: December 2012

On the basis of silk fabric product specifications, making use of programming software to deal with product information, complete the complicated process calculation, realize the connection and running of products information database with the front desk inquiry calculation software. The system can achieve the number of all kinds of machines by automatic accounting according to the requirements of the design, and realize variables to be automatically selected such as the spindle number, efficiency, working hours and linear velocity. Automatically plot and analyze the variation trend of mechanical number in different fabric situation when the number of loom or annual output equality variation. The system contribute to production manager configure the process equipment rapidly and estimate the production ability.
The Stress Analysis of Drilling Derrick Structure Based on Finite Element Method
Authors: Wang Jiang Ping , Bao Ze Fu
Published: December 2012

Oil-drilling derrick is the most important integrant of the equipments in oil industry and is also a giant load bearing structure. In this paper, the 3D geometric model of the derrick is created by commercial finite element analysis (FEA) software ANSYS, and the static stresses under several working conditions are analyzed. The displacement and stress distribution of the derrick acquired can lay the theoretical basis for the optimization design of structural and material choices of the derrick further.
An Application of Time Classification in the System Maintenance Allocation
Authors: Li Yong Xiang , Li Ying , Lv Chuan
Published: December 2012

The aim of the maintenance allocation is to allocate the maintenance time of the subsystems reasonably and accurately. Traditional MTTR (mean time to repair) allocation methods are most often based on the products’ complexity. However, there are a lot of deficiencies in practical application. To allocate the system MTTR of the subsystems more precise and reasonable, a better model is needed. The aim of this paper is to develop an improved model to allocate the maintenance time, as well as picke out the common maintenance time and allocating e the MTTR in the subsystems more accurately.
The Research of Minimum Quantity Lubrication Mechanism in Grinding with Mechanical Mechanics
Authors: Sun Hao , Feng Yi Hua
Published: December 2012

Effective cooling and lubricating is got by use a small amount of cutting fluid in MQL grinding. Compare grinding performance under various cooling lubrication, reasonable grinding temperature, lower grinding force, improved surface quality and extended wheel life is got in MQL grinding. The grinding performance of MQL grinding is also influenced by many factors, such as the nozzle shape, position, distance, and MQL flow rate.
Scheme of Model Updating and Implement for Structural Dynamics Analysis
Authors: Yao Dong Sheng , Zhao Li Bin
Published: December 2012

Model updating techniques are used to modify structural model for more accurate predictions of dynamics behavior. A simple survey on the model updating methods and correlation criteria is presented. Based on the inverse eigensensitivity method (IESM) and modal assurance criterion (MAC), a scheme of model updating for structures is presented and realized by user defined subroutine combined with APDL in commercial software ANSYS®. A four-DOF spring-mass system is assumed and updated, from which the predicted frequencies and MAC values are satisfied compared to the actual dynamics characteristics. This gives evidence that the presented model updating scheme is feasible and efficient. Furthermore, a cylindrical shell structure containing global and local modal information is established to research the updating ability of the scheme on some focused local modal information. The results due to the updated model of cylindrical shell structure show that not only the global modal data but also the local modal data have a good agreement with that of the actual structure.
Design of Parameter Optimization Based on High Efficient Vibration Screener with Mechanics Properties
Authors: Meng Ling Qin , Wang Zhi Wei
Published: December 2012

The screener is widely use in metallurgy, mine, etc. Now the low productivity ratio and low efficiency influence a lot to the working of factories. In this paper, we analyze the motion of object on the screener, and then build the mathematical model to maximize the productivity ratio. Take the example of straight Line vibration screeners with mode ZKB. After maximizing with our method, the result shows that our method increases 21% in the productivity ratio, and the chance of object touching the screen holes increases 45%. This paper provides an effective method for the optimal design of screener in future.The results of this study can also be applied directly to enterprise product design.
Effects of Different Initial Imperfections including Residual Stress on the Compressive Bearing Capacity of Steel Angles in Towers
Authors: Zhu Bin Rong , Yang Jing Bo , Li Qing Hua
Published: December 2012

Angles are extensively used in latticed transmission tower. Initial imperfections have a significant impact on the compressive instability and failure of angle components. To study the impact of different initial imperfections on the compressive bearing capacity, general-purpose finite element software ANSYS is used. With shell element SHELL181, selecting angle L200×20 of the slenderness ratio of 20, 40, 60, 80, 100 and 120, the bearing performance analysis with initial imperfections is conducted, including initial bending, section defects, initial eccentricity, residual stress, and a combination of imperfections. At the same time, for the angle components of the optimal slenderness ratio of 40 and slenderness ratio of 80, under the single influence of initial bending, section defects and residual stress, how the size of the value of the imperfections affects the bearing performance is investigated.
Wind Turbine On-Line Monitoring System Based on Vibration Mechanics
Authors: Bian Zhong Guo , Liu Shu Qin , Yang Hong Tao
Published: December 2012

Wind turbine in the run-time under natural wind conditions, it will cause the turbine vibration. The vibration will cause the body of material fatigue, will increase the probability of the unit appears damaged, and will cause the turbine speed dropped significantly reduce the output power. This paper introduced a wind turbine monitoring system based on vibration Mechanics, which included the hardware test platform, remote transmission and monitoring software platform based on LabVIEW. Hardware monitoring used the computer as the control centre, according to the operating parameters of wind power generation system which included the wind speed, the generator voltage and current, the charging voltage, current and power, the vibration quantity of the wind turbine, the working state of the energy storage devices and the load, displayed and stored the data and curve through the sensors and signal conditioning circuit. Senseless monitoring was used to monitor the speed of generator. This monitoring system provided the basis for the match of the engine power and efficiency of wind turbine and generator.
Research on Coal Mining Material Active Perception System Based on IOT and Coal Resources
Authors: Li Jing Zhao , Deng Hui Mei
Published: December 2012

The framework of initiative coal mining system based on the perception layer of Internet of things (IOT), took the way of combination initiative acquisition, with timing and real time to implement “people, ring, and material” perception of the underground of coal mining is proposed. On this basis, coal mining material active perception system is designed. This system applies computer and IOT perception instead artificial operation in the current coal manufacturing equipment and material field. It is analyzed that design concepts of coal mining material active perception system, function and characteristics, system structure, information collecting, data synchronization and EPC coding of coal manufacturing equipment and material.
Steel Fiber Reinforced Concrete Pavement Maintenance
Authors: Yu Xiao Qing , Lin Mao , Geng Guang Long , Jia Li , Wei Na
Published: December 2012

In this paper, a cement concrete pavement, steel fiber reinforced concrete with than the experimental study, the analysis of steel fiber reinforced concrete pavement engineering, test results show that the steel fibers in the concrete evenly distributed, with cement mortarbetter integration, better crack resistance of concrete, and shrinkage of steel fiber reinforced concrete is much smaller than the specification requirements, and so has a great advantage for pavement repair.
Study on Mechanical Properties of Steel Fiber Reinforced Concrete
Authors: Yu Xiao Qing , Lin Mao , Geng Guang Long , Wei Na , Jia Li
Published: December 2012

This study through a large number of experiments on the mechanical properties of steel fiber reinforced concrete, with reference to the relevant test data test with specimen, concrete static compression, splitting tensile, flexural comparative tests, comparative analysis of steel fiber on the mechanical properties of concrete.
Study on Error Analysis of On-Line Measurement System with Analysis of Inner and Outside Environmental and Equipment Materials
Authors: Peng Er Bao , Zhou Wei , Wang Hong Ying
Published: December 2012

The error analysis of the on-line measurement system used in the processing parts of numerically-controlled machine is investigated, and the image processing technilogy is analyzed through the investigations on error source, error analysis and geometrical error analysis, in which, Analysis of lnner and outside Environmental and Equipment Materials,much consideraton is paid to the image treatment and the object margin extracting process conducted to the images segmented and disposed in terms of image preprocessing and segmentation. Therefore, such an investigation is of great importance to enhance the machining precision of parts.
Analysis of Concentric Canister Wall Roughness Effect on Jet Flow Based on Fluid Dynamics
Authors: Bai Yun Shan , Jiang Yi , Zhou Dong Mo
Published: December 2012

Adopting concentric canister launchers (CCL), high temperature and high pressure environment of CCL is unfavorable for the missile launch. In addition to the gap between internal canister and external canister, injecting water for cooling are the main factor of impact the canister flow field, CCL’s rough wall is also a very important influence factor. In this paper, under the two working conditions of rough wall and smooth wall, use dynamic layering manner of moving mesh update method to simulate concentric canister missile launch process. The results reveal that rough wall has a great influence for pressure of concentric canister internal flow field, but the least influence for temperature. In practical engineering applications, need smooth surface material for smooth flow field exhaust when manufacturing concentric cylinder, but the non-concentric canister manufacturing of missile cold-launch canister, retain the rough wall can increase the pressure of the missile launch, this is conducive to missile launch, and also saves manufacturing costs, reduces processing procedures.
A New Methodology of CBR Design in Manufacturing System for Peanut Shelling Key Parts
Authors: Hou Jun Ming , Pan Kun , Yang De Xu , Gao Lian Xing
Published: December 2012

Peanut is one of the important oril corps, which is applied in the food and other fields. How to realize the peanut shelling is a problem to be solved. A methodology for peanut shelling machine design in manufacturing system is proposed in the paper. CBR method is applied for shelling manchine desing. The basic conception is introduced. The CBR method that applied for key part design of shelling machine is introduced in detail. An example is got for the methodology.
Study on Nylon Cutting Properties Based on Cutting Temperature with Material Properties in Manufacturing System
Authors: Fan Ning , Guo Pei Quan , Fu Xiu Li
Published: December 2012

In nylon material manufacturing process, cutting temperature is key factor to nylon cutting properties. The glass transition temperature should be regarded as criteria for determining proper cutting parameters. The cutting temperatures variation of workpiece and chip with time under different rake angles are calculated by finite element method. It is shown that cutting temperature on workpiece surface is higher than that on chip and decreases quickly. The rake angle of cutting tool has great effects on workpiece cutting temperature. Thus the rake angle should be rationally selected to guarantee quality for manufacturing system.
Material Scheduling with Storage Windows Based on Modified Particle Swarm Algorithm for Material Manufacturing System
Authors: Zhang Xin Min , Zhang Su
Published: December 2012

In order to solve the logistics problems in replenishment delay, low efficiency, high delivery time cost occurred on the side of automobile assembly line, a combination of “Workstation - Supermarket” is proposed to optimize vehicle scheduling. Storage windows are firstly proposed to replace pervious time windows. In this paper, based on analyzing the JIT material flow of line side, an optimization scheduling model with storage windows is established by taking the minimum of total delivery time as the objective function. A modified particle swarm optimization algorithm (MPSO) is introduced to solve the model. The result of simulation showed that the MPSO has superior performance on the proposed vehicle routing problem with storage windows (VRPSW). Furthermore, it is shown that MPSO is more efficiently on VRP in material manufacturing system.
Analysis on the Establishment of Sustainable Developmental Competition-Index-System in Industrial Manufacturing System in Hebei
Authors: Zhao Yan Na
Published: December 2012

This article puts forward the new research methodology during establishing evaluation index system of industrial manufacturing system competence in He Bei .Firstly, we establish a set of the primary evaluating Index system. Secondly,we assess and screen these Indexes. At lastly ,we determine the final evaluating Index system.The Index system is more objective in this way.
Research and Practice on Manufacturing Internship for Mechanical Industrial Design
Authors: Jiang Xiao Wei , Cheng Xian Chun
Published: December 2012

In view of that manufacturing internship is indispensable practical links in the mechanical industrial design, the author analyzes the current situation of manufacturing internship in the mechanical industrial design and the existing problem in manufacturing internship system, discussing the necessity of research and practice on manufacturing internship for the mechanical industrial design. Among them establishing the manufacturing internship factory of mechanical industrial design on campus, which lets the student enter and learn various practical skills after learning certain basic courses, or setting up the outside cooperative manufacturing internship basement, is particularly important. And then the concrete research methods and the implementation steps are put forward. On this foundation, the research and practice conclusion on manufacturing internship for mechanical industrial design is done.
Effects of the Magnetic Damper Locations on Dynamic Characteristics of the Active Magnetic Bearing System in Manufacturing Engineering
Authors: Xie Zhen Yu , Zhou Hong Kai , Wang Xiao
Published: December 2012

The magnetic damper was introduced into the high speed rotating machinery to restrain the vibration of the rotor supported by active magnetic bearings. The experimental setup, which was made up of one rotor, two radial active magnetic bearings, one axial active magnetic bearing, one magnetic damper and control system, was built to investigate the effects of the magnetic damper locations on dynamic characteristics of the system by theoretical analysis, experimental modal analysis and actual operation of the system. The results show that the vibration of the active magnetic bearing system operating at the modal frequency can be reduced more effectively if the magnetic damper is located far from the nodes of the corresponding mode shape.