bluuebunny/crossref_metadata_2025 huggingface dataset:
The Influence of the Processing Parameters in the Ultrasonic Activated Injection and Extrusion
Authors: Adam Andrei , Stan Daniel
Published: September 2013

A multifunction experimental system was designed in a flexible configuration allowing simulation of thermoplastic material processing through extrusion, injection or micro-injection in the presence of the ultrasonic activation. The paper presents the results from a set of experiments performed at first in classical extrusion conditions of most common polyolefines (LDPE and PP) and then in the presence of the ultrasonic activation. The main processing parameters were compared, analyzed and ranked after their effect on extruded flow as output data. For the specific conditions of extrusion through narrow interstice, the ultrasonic activation was proved to be the main factor of influence overcoming the classical factors as temperature and the pressure. The last presented set of experiments was focused on particular processing conditions of injection through narrow section thin-wall injection and microinjection. In these cases, the ultrasonic activation does not play an important role as single influence factor but could amplify or strengthen the influence of classical setting parameters of the process: mould temperature, injection pressure and temperature.
Synthesis, Characterization and Mechanism of Benzamide Intercalated Kaolinite by Replacement Method
Authors: Xia Hua , Zhang Sheng Hui
Published: September 2013

Kaolinite/benzamide complex was prepared by displacement reaction of a kaolinite/dimethylsulphoxide (DMSO) intercalation complex with melted benzamide. The whole process was recorded by powder X-ray diffractometry (PXRD) and Fourier-transformed infrared spectroscopy (FTIR). Those PXRD and FT-IR indicated that there are two stages in the process of melted benzamide replacing intercalation. The first stage is the deintercalation of DMSO molecules in the kaolinite/dimethylsulphoxide intercalation complex. And the second stage is the melted benzamide intercalation.
Position Control of a Flexible Beam Actuated by Two Active SMA Wires
Authors: Zakerzadeh Mohammad Reza
Published: September 2013

SMA-actuated flexible structure become nonlinear in large deflection mode and as a result become more sensitive to the actuator applied force. In order to overcome this problem, in this paper, the hysteresis nonlinearity of SMA-actuated flexible structure is modeled by the generalized PrandtlIshlinskii model. Subsequently, a feedforwardfeedback controller is used to control the tip deflection of the SMA-actuated structure. The feedforward part of the control system is based on the inverse generalized PrandtlIshlinskii model while a conventional proportionalintegral feedback controller is added to the feedforward controller to increase the accuracy. However, in order to increase accuracy of position control system, in addition to the main SMA actuator, another auxiliary SMA actuator is attached to the structure. It is shown by the experimental data that, in comparison to the time that only main SMA actuator is attached to the structure, the proposed controller in the new architecture has increased the accuracy of the position control system.
Analysis on the Combination of Machinery Manufacturing Theories and Automated Manufacturing Modes
Authors: Zhao Cong Rong
Published: September 2013

There is a deep connection between machinery manufacturing theories and automated manufacturing modes. In a sense, automation technologies aim to meet the needs of mechanical manufacturing, and automated manufacturing modes have a broader range of applications. However, with the development of economy and technology, the mechanical devices themselves are more complex and sophisticated, and the traditional machinery manufacturing theories and automated manufacturing modes are difficult to meet the demands of production. In order to find a better solution, based on the concept of machinery manufacturing theories and automated manufacturing modes, this study analyzed the generated characteristics after the combination of the above two objects, such as integrated, market-oriented and intelligent, etc.
Research on Ceramic Title Automatic Packaging Corner Machine Based on Extension Theory
Authors: Li Ai Hua , Zhang Guo Quan , Li Yan Ling
Published: September 2013

In order to improve automatic level of packaging for lump material,extension knowledge that contains matter-element,extension transformation,correlative function,rhombus thought model,was applied in conceptual design.Extension theory was used to depicted the requirements of product design that adapt ceramic title automatic packaging corner machine and then the optimal scheme was obtained through optimal degree evaluation method, which verified the validity of Extension Theory.
Compactability Analysis of Soil-Rock Mixture
Authors: Yu Lin Ping , Wang Zhi Yun
Published: September 2013

With soil-rock mixture (SRM) as the object of study and compaction test as the means, the paper studies the compactability of the SRM and analyzes the compactability influencing factors and engineering properties after compaction. Studies show that the soil engineering properties of compacted SRM are greatly improved, so it is a building material with broad application prospects.
Research on Fatigue Performance of Modified Asphalt Mixture in Intermediate Course of Pavement
Authors: Sun Zhao Hui , Wang Xiao Hong , Zhu Guang Qiang , Ou Pei Dong , Ma Jing
Published: September 2013

Beam bending fatigue test was done by MTS810 using stress control mode, the double logarithm fatigue equations and Weibull fatigue equations of three types of modified asphalt mixtures for intermediate course under different design method are gained. Good performance of the modified asphalt mix design programs are choose to use in the Northeast region to explore the modified asphalt mix design method for the use of intermediate course through a comparative study of 3 types of modified asphalt mixture fatigue performance.
Effect of Polycarboxylicacid Plasticizer on Characteristics of α-Calcium Sulfate Hemihydrate
Authors: Liu Xian Feng , Peng Jia Hui , Zhang Jian Xin , Chen Ming Zheng , Dong Qian
Published: September 2013

Purpose: studied the mechanism of polycarboxylicacid plasticizing effect on α-calcium sulfate hemihydrate. Methods: the adsorbed amount was tested by ultraviolet visible absorption spectrum method, ζ potential was measured by micro-electrophoresis analysis, and the corresponding workability was studied. Results: firstly, polycarboxylicacid plasticizer was adsorbed on α-calcium sulfate hemihydrate by Van Der Waals force and the saturated adsorption quantity of polycarboxylicacid plasticizer (HC) was about 5.8mg/g; secondly, the decisive factor for polycarboxylicacid plasticizer to disperse α-calcium sulfate hemihydrate particles was the steric hindrance of polycarboxylicacid plasticizer, and the maximum ζ potential of α-calcium sulfate hemihydrate with polycarboxylicacid plasticizer was-9.360mv, much less than β-calcium sulfate hemihydrate under the same conditions; finally, the perfect mixing content of polycarboxylicacid plasticizer was 0.3%~0.6%; it increased fluidity by 66%, to the maximum 300mm.
Dynamic Modulus Characteristic of Large Stone Permeable Asphalt Mixtures
Authors: Wei Jin Cheng , Li Jin
Published: September 2013

To study the dynamic modulus characteristic of LSPM mixes, dynamic modulus test was conducted for Large Stone Permeable Asphalt Mixtures (LSPM ) with neat asphalt and with modified asphalt and the range of dynamic modulus values for LSPM was determined and the dynamic modulus master curves were developed. The magnitude of the dynamic modulus decreased with an increase in temperature and increased with an increase in the frequency. The phase angle decreased as the frequency increased at low temperature. With temperature increase, there was a transition interval, where the phase angle increased up to frequencies of 0.5 Hz, and then it started to decrease as frequency increased. After the transition interval, the phase angle increased with an increase in frequency. Master curves developed by sigmoidal function showed that LSPM with modified asphalt exhibited higher dynamic modulus values at middle and high frequencies and lower dynamic modulus values at low frequencies.
Study on Probability Distribution of Ship-Bridge Collision Force Formula
Authors: Shao Jun Hu , Song Shuai
Published: September 2013

The probability distribution with different ship-bridge collision formulas are studied using Monte-Carlo method. It used the distribution fitting tool with the sampling results, and got the forms and parameter of probability distribution of different ship-bridge collision force formulas. The results indicate that the logarithmic normal distribution and generalized extreme value distribution can well reflect the probability distribution characteristics of ship-bridge collision formula. The probability distribution characteristics proposed can be directly used in the reliability index calculation of bridge under the ship collision.
Axial Compression Bearing Capacity Calculation of Hoop Reinforcement Concrete Column
Authors: Tang Jian , Wu Lang , Xiong Na
Published: September 2013

Concrete column in engineering need to increase the bearing capacity for various reasons, and requires the column section not to increase. In order to solve this problem, we start two tests of concrete column reinforced hoop and steel plate hoop reinforcement to propose the formula for calculating the bearing capacity, which can be used for reference in the practical engineering.
Study on Elastic-Plastic Damage Constitutive Model of Frozen Soil Based on Energy Dissipation Theory
Authors: Li Zhi Min , Liu Tao , Cui Zhi Li
Published: September 2013

Starting from the thermodynamics, model of frozen soil is studied by energy dissipation theory and the inside and outside the state variables is given under isothermal conditions. Damage of frozen soil is re-flecked by effective stress and damage tensor in Damage Mechanics. Dissipation function is in form of plastic dissipation function (DP yield criterion) and the damage dissipation function. And plastic dissipation function is coupled of the damage variable. Through the elastic-plastic and damage evolution, frozen soil incremental elastic-plastic damage constitutive model is made. And finite element scheme is given.
Key Points Analysis for Seismic Design of Super High-Rise Building
Authors: Mei Ting Yu , Wu Lang
Published: September 2013

In recent years, high-rise buildings have developed very rapidly in our country. Because of the particularity of the high-rise building, more strictly technical measures should be taken in seismic design to ensure security. Three level fortifications, two stage design method have been used for seismic design in our country. Combined with the practical, the key points of response spectrum, time history analysis and performance design which related to seismic design of high-rise buildings were analyzed.
Research and Application of Building Enclosing Structure Used in Equipment Noise Control
Authors: Xu Nan
Published: September 2013

Porous material has a function of sound absorption, dense hard material can prevent the spread of airborne sound. The building envelope which is made up of different properties of materials, with good effects on sound insulation, sound absorption and noise elimination, can be widely used in noise control engineering.
In Situ Growth of Carbon Nanotubes on Carbon Foam for Enhanced Oil Adsorption
Authors: Liang Jing Jing , Zhao Zong Bin , Hu Han , Qiu Jie Shan
Published: September 2013

This work presents a facile approach to grow carbon nanotubes (CNTs) on the surface of carbon foams (CFs) for the fabrication of hierarchical CNTs/CF composites, which exhibit enhanced oil adsorption capability. The preparation of CFs is carried out by using commercially available polyurethane (PU) foams as hard template and resol as carbon precursor. Fe/Mg/Al layered double hydroxide (LDHs) is used as catalyst precursor for the efficient growth of CNTs on CFs via chemical vapor deposition (CVD), in which CNTs are controllably grown onto the strut of CFs. The presence of CNTs in the CFs can significantly improve the hydrophobicity of the composites and enable the selective separation of oil from water with the combination of hydrophobicity and capillary action. Such well-designed hierarchical nanostructures are benefit for maximum utilization of cell structure and surface property of the composites and display good oil adsorption performance. The synthesis procedure paves the way for the exploitation of the CFs as adsorbent for the removal of spill oil and environmental protection.
Submarine Slope Stability Evaluation Based on Strength Reduction Finite Element Method
Authors: Cao Jin Feng , Jin Xiao Jie , Li Jia Gang , Hu Guang Hai
Published: September 2013

Submarine landslide can destroy various engineering facilities. So, submarine slope stability evaluation is not only an important link of the construction safety guarantee and soil mechanics in the new field of ocean direction, but also the development of energy demand. Based on the finite element software Abaqus, the strength reduction method has been introduced to submarine slope stability evaluation. With the same finite element model, the safety factors of the land slope and submarine slope are respectively 1.82, 1.83, and 1.205, 1.215, using two criterions such as run-through of plastic zone and run-through of the equivalent plastic strain zone. The studies show that the submarine slide has the following characteristics: the displacement is 5~10 times larger than that of landslide; the obvious " uplift " and " collapse " phenomenon appears near the slope toe and the top of slope; the slide region is much more wider, deeper, less clearly slip shear zone boundary.
Establishment of Ecological Security Pattern for Suzhou National New & Hi-Tech Industrial Development Zone
Authors: Li Yong Hong , Xiang Bao , Hu Yu
Published: September 2013

The construction of regional ecological security network system can effectively ease urban environmental pollution and enhance the comprehensive competitiveness of the region. This paper, based on Suzhou National New & Hi-tech Industrial Development Zone (SND) as a study case, intends to explore an approach to establish the ecological security pattern for rapid development region. The paper has established an ecological security critical areas composed by Mt. Dayang, Mt. Shu, Mt. Jilong, Mt. Fenghuang and other mountains as well as Tai Lake Wetland Park, three ecological corridors comprising greenbelt along Taihu Avenue, Beijing-Hangzhou Grand Canal and greenbelt along the Canal, Huguang Canal and greenbelt along the Canal, as well as urban parks such as Dabai Marsh, Mt. He, Mt. Shi and Zhengshanlu Park etc. and junctions between roads and rivers etc. to make up the ecological nodes so as to build an ecological security network pattern for SND, which is of great significance for the regions sustainable development.
Development of Rainwater Purification and Reclaimed Water Treatment Systems Using a High-Efficiency Air-Cooled Ozone Generator
Authors: Ha Sang An , Kim In Soo , Son Kwang Suk , Wang Jei Pil
Published: September 2013

The objective of this study is to improve water quality resulting from rainwater purification treatment and to utilize reclaimed water purification system and high-class treatment purification system. This can be done by developing a purification treatment technique through resolution of discharged ozone problems by circulation-type of ozone treatment method with the use of a high-efficiency air-cooled cylindrical ozone generator. While the final removal rate of BOD showed the highest rate of 96% for 12g without showing a great difference for the ozone injection amount of 9g and 12g, the final removal rate of COD upon treating for 12 minutes showed 73%, 66%, 93% and 96% for 3g, 6g, 9g and 12g, respectively, exhibiting similar treatment results to that of BOD. The removal of TSS and VSS due to ozone treatment was indicated not to have occurred. Also, upon passage of the magnetized water device, the removal rate of colon bacterium and general bacteria was shown to be about 35%, while a high removal rate exceeding 70% was indicated during the initial 3 minutes. Upon final treatment for 12 minutes, sterilization power above 99% was exhibited. Upon treatment using the magnetized water device and the OH- radical generator, not only dissolved suspended materials but also excellent sterilization power appeared to be identifiable.
The Formed Mechanism of Pores in Plasma Sprayed Nanostructured Al2O3/TiO2 Coatings
Authors: Wu Wei Qin , Wei Zhen Yi
Published: September 2013

Pores are common defects in the coating formed via plasma spraying. In order to investigate the formed mechanism of pores in plasma sprayed nanostructured Al2O3-TiO2 coatings, the microstructure of the feed stock, splat and coating were characterized by means of scanning electron microscopy (SEM). The coating shows a typical lamellar morphology, which contains fully melted (FM) zone and partly melted (PM) zone.The pores in different places of the coating were generated from different sources. The shapes and the size of the pores are also different. Keywords: plasma spray, coating, pores, formed mechanism
Study on Spatial Characteristic in Micro Level of Rural-Urban Construction Land Expansion Based on the GWR Model - A Case Study in Tonglu County of Zhejiang Province
Authors: Cai Dong , Chen Yan Ming
Published: September 2013

Research on rural-urban construction land expansion is on the macro perspective at home and abroad. However there is less research on detail characteristics and internal mutation of rural-urban construction land expansion, so that the accurate spatial distribution of rural-urban construction land may not be realized. In this paper, Tonglu County of Zhejiang Province is selected as study area. The spatial characteristic in micro level of rural-urban construction land is analyzed based on the spatial residual distribution of geographically weighted regression model. Residual of the model is used to describe the difference between actuality value and simulation value. Original residual of the model is standardized, which describes the hot spots and cold spots for development of rural-urban construction land. This research will support the micro decision-making of rural-urban construction land both in technology and decision, and guarantee the healthy development of rural-urban construction land with rational distribution.
Studies on Several Problems of Rotary Impact
Authors: Wang Lin
Published: September 2013

The impulse theorem of mass center and the impulsive moment theorem relative to the center of mass and the kinematic consistency condition of studied problems are employed to investigate the friction oblique collision problem of planar moving small sphere and the friction wheel collision problem and the tube nut axial impact problem, the kinematic parameters of each problem after impact are obtained, the conclusions here can provide theoretical references to further designs of experiments and engineering design calculations.
Research on the Motion Mechanism of Offset Press's Ink Roller
Authors: Chu Hong Yan , Zhao Jun Tao , Cai Li Gang
Published: September 2013

The hard roller and soft roller are alternately arranged in the inking system of offset press. The ink vibrator is a hard roller which transmits the motion to the ink distributing roller. In order to analyze the motion mechanism of the ink roller, a model of an ink distributing roller and an ink vibrator is built up by using the software ANSYS. After the simulation of the motion, the force on the contact area of the ink distributing roller and the rotation speed of both rollers are analyzed. The result is that the ink distributing roller rotates with tangential force on the contact area and this force increases together with the rotation speed. When the two rollers rotate, the tangential elastic deformation is caused by the tangential force on contact area, and the radial deformation of the ink distributing roller is caused by the pressure. It leads to a relative sliding of the two rollers, which is mainly influenced by the rotation speed of ink vibrator and the radial deformation of ink distributing roller. Meanwhile, to verify the accuracy of the analysis, the rotation speed of the two rollers and the deformation of the ink distributing roller have been measured on a printability tester and then compared with the results of simulation. The analysis of the motion mechanism is very important to the study of printing color quality control.
Study on Hydraulic Fracturing Affected by Horizontal Principal Stress
Authors: Huang Bo , Ma Tian Hui , Li Ai Shan , Sun Jian Qiu , Zhang Liao Yuan
Published: September 2013

Adopted with the actual value of statistic geo-stress, using RFPA software to simulate the hydraulic fracturing of underground. The sample is treated as elastomers and simplified into plane problem, submit strength, elastic modulus, poisson ratio to weibull distribution. It could be found in figures that the size, length, extending direction of two crack is not identical. The cracks` forms grow into symmetry horizontal double-wing crack from the final result, besides, crack propagation direction is perpendicular to the direction of the minimum principal stress.
Asymptotic Behavior of a Chemostat Model with Watt Type Functional Response and Variable Yield
Authors: Dong Qing Lai , Sun Ming Juan
Published: September 2013

To make the theoretical analysis of the microbial continuous culture more close to the experimental results, we consider a chemostat model with Watt type functional response and variable yield. The existence of limit cycles and Hopf bifurcation is investigated, which is useful in the further study of the oscillatory behaviors of the microbial growth in the vessel. The conditions for the global asymptotical stability of the model are obtained by Dulac criterion.
Hermetically Metal Sealing Random Vibration Damage Mechanism and Fatigue Life Prediction
Authors: Han Teng , He Xiao Qi , En Yun Fei
Published: September 2013

Finite element simulation method of random vibration analysis was used for hermetically metal sealing. According to the results of the random vibration analysis and the theory of fatigue fracture mechanics, the hermetically metal sealing on the PCB plate cracking damage mechanism was analyzed. The danger point of the Von Mises stress was obtained, and the Von Mises stress - time history data was accessed through inverse Fourier transformation. And rain flow count method was used to calculate Von Mises stress-time history data of cycle count. The linear cumulative damage theory and the material S-N curve were used to calculate the fatigue life of Hermetically metal sealing.
Analysis to Earthquake Resistant Behavior of Composite Steel Plate Shear Wall Based on ABAQUS Software
Authors: Yang De Jian , Chen Zong
Published: September 2013

The structural system and seismic performance of the composite shear wall are analyzed based on the horizontal load model tests. The test models are three groups of combined shear walls with shear span of 1.5, including an ordinary shear wall, a shear wall with vertical steel plates and a shear wall with transverse steel plates. The finite element software ABAQUS is used to build the calculation model of the shear wall structure. And the analysis the influence of steel plates to bearing capacity, ductility, and stiffness of shear wall are carried out. The research results indicate that the combination shear wall has good seismic behaviors.
Preparation and Characterization of CA-PEI Double Modification Water-Based Magnetic Fluid
Authors: He Xi Sheng , Peng Hui Qing , Li Jin , Dong Jun
Published: September 2013

Fe3O4 magnetic nanoscale water-based magnetic fluid was fabricated by co-precipitation with citric acid (CA) and polyethylene amine (PEI) as dispersant. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM) were used to investigate the samples.The modified magenetic nanoparticles (MNPs) size of about 50nm and have a saturation magnetization about 0.25emu/g.These nanoparticles can be applied to the study of genophore.
Theoretical Analysis of Seismic Response for Marine Drilling Risers
Authors: Li Jun Qiang , Li Yi Fan , Peng Yong
Published: September 2013

With the continuous development of the marine oil industry, risers have become necessary equipment in offshore drilling engineering. On the basis of mode-superposition response spectrum method which is used commonly in anti-seismic design, the seismic responses of the marine drilling riser is analyzed on the theoretical and the related anti-seismic calculation formulas of the discrete system are promoted to the continuous system. The earthquake force and the resultant internal forces when the earthquake happening are analyzed and calculated. The calculation formulas of shear force and bending moment for each cross section of a riser under the earthquake action are deduced, which can offers some theoretical reference for riser engineering design when considering earthquake action.
Influence of Axis Curvature Radius on New Annular MEFP
Authors: Zhou Tao , Du Zhong Hua , Song Li Li
Published: September 2013

According to the detonation wave collision theory, initiation from two ends of charge, the liner will close to the middle to form high velocity penetrator. To achieve better closed effect, the influence of axis curvature radius on a single Annular MEFP was studied. Axis curvature radius influence little collision pressure, but is the important factor affecting the formation. The results showed the presence of axis curvature radius can all reach the closure effect, but different greatly. The velocity and mass of penetrator increase as decrease of axis curvature radius, but it forms easily to be rod jet, when the radius is too small. The penetrator mass have bigger loss as increase of axis curvature radius.
Random Response Analysis of Vibration Transfer Path Systems with Translational and Rotational Motions
Authors: Zhao Wei , Zhou Na , Zhang Yi Min
Published: September 2013

This paper based on the generalized probabilistic perturbation finite element method solves the random response analysis problem of vibration transfer path systems with translational and rotational motions. The effective random response analysis approaches are achieved using Kronecker algebra, matrix calculus, generalized second moment technique of vector-valued functions and matrix-valued functions. For the vibration transfer path system with multi-dimensional paths, the random response is described correctly and expressly in time domain as uncertain factors, which include mass, damping, stiffness and position, are considered. The mathematical expressions of the first order and second order moments for the random vibration response of vibration transfer path are obtained. According to the corresponding numerical example, the results of calculation are consistent with the results of Monte-Carlo simulation, which shows the method is feasible theoretically.
Statistical Energy Analysis of Subway Wheel/Track Noise
Authors: Zhang Xiao Feng , Xiao You Gang , Shi Yu , Zeng Wu Yang
Published: September 2013

Dividing wheel-track system of subway into a series of sub-systems, the statistical energy analysis (SEA) model of wheel/track system is established. The factors affecting the wheel/track noise, such as modal density, damping loss factors, coupling loss factors, are gotten by theoretical analysis combined with experiments. The calculated results show that the track noise is about 4.5 dB(A) higher than the wheel noise at 160 km/h, and the wheel noise is reduced by 2.8 dB(A) at 160 km/h and by 2.3 dB(A) at 90 km/h by attaching damped layer plates to the wheels, but the total reduction is only 0.9 dB(A) at 160 km/h and 0.4 dB(A) at 90 km/h, so the attempts to reduce the total noise should exert noise control measures on the track, not on the wheel.
An Application of the Maximum Shear Strain Increment in Searching Sliding Surfaces
Authors: Cheng Liu Yong , Li Jian , Chen Shan Xiong , Chu Xiao Jie
Published: September 2013

A slope landslides generally at the place where the shear strain increment is the largest. This position is considered as the standard of defining sliding surfaces to assess the slope stability under the action of the foundation. A new method is proposed to determine the potential sliding surface, which is based on the largest shear strain increment. Firstly, the stress and strain in the slope were calculated by using the finite difference software-FALC3D. Secondly, a series of vertical line would be set in the calculating section. And then the discrete coordinates of the sliding surface, where the shear strain is largest on the vertical line, would be found through programming fish program. At last the position and shape of the sliding surface can be obtained through carrying on curve fitting of the discrete points by using the least squares method. The concept of this method is clear and can reflect the true form of the sliding surface through contrasting with the limit equilibrium method. Sliding surfaces of different depths and distances of slope are researched and a quadratic function is put forward which can describe the trends of glide direction. Three coefficients of the quadratic function were analyzed and the corresponding expression was obtained which can provide a reference to specification revision and engineering.
A Survey of Fluidic Thrust Vectoring Nozzle by Numerical Analysis
Authors: Li Li , Shi Zhi Hui , Saito Tsutomu
Published: September 2013

Numerical investigations are conducted to simulate the flow field of a 2D converging-diverging nozzle, for fluidic thrust vectoring. The numerical simulation of nozzle flow is carried out with Navier-Stokes equations model. Simulations are done with different primary and secondary jet conditions. The numerical results show that the smaller of the distance between secondary jet and exit, the larger is the thrust deflection angle. As the injection pressure ratio increases, the deflection angle increases followed on the premise of not far between secondary jet port and exit. The parameters play important roles on thrust vectoring capability.
Water Coning Simulation Mode in Fractured Gas Reservoir with Bottom Water
Authors: Huang Xiao He , Zhu Wei Yao , Lou Yu
Published: September 2013

There are two percolation models, horizontal radial flow above perforation interval, and semispherical centripetal flow below perforation interval. Based on this models and the theory of percolation flow through porous media, a study on prediction of water breakthrough time in fractured gas reservoir with bottom water is presented. Through mathematical calculations, a formula to determine the time of water breakthrough in fractured gas reservoir with bottom water wells is derived. Case study indicates that water breakthrough time decreases with the fracture development index. With increase of perforated degree, water breakthrough time increase first and then decreased after a critical value, which could be considered as optimum perforation degree. If the perforated degree is fixed, the water breakthrough time is directly proportional to the thickness of the gas reservoir and inversely proportional to the gas production rate.
Research on Negative Pressure Wall Climbing Absorption System Based on SMA
Authors: Dai Fang , Liao Gao Hua
Published: September 2013

This paper presents a negative pressure absorption system of climbing robots. Based on the utilization rate of the negative pressure climbing robot, the impacts of locomotion system adsorption forces allocation were studied. In order to solve the problems of sliding wall climbing robot's great power consumption and low efficiency design, a negative pressure generator of the low power consumption and high efficiency was investigated. After the analysis of robot's pressure needed and flow leakage fluid dynamics, the relationship between negative working pressure was established.Through the thermo dynamic analysis of the component process of state changes in suctions flow field was described, and the principles of the adsorption system were revealed. The results show that negative pressure can be stably generated and the system realize firmly adsorbing on wall. The theoretical and experimental result of wall climbing robot contributes to further perfecting the performance of robot.
Finite Element and Molecular Dynamics Multiscale Framework for TRIP Steel Macro and Micro Material Behavior Investigation
Authors: Li H.Y. , Li X. C. , Li J. H. , Ma J. I. , Zhang Y. J.
Published: September 2013

Transformation induced plasticity steels (TRIP steel) is a kind of low – alloying high strength steel with good combination of strength and plasticity. But the macro mechanical properties depend on the microstructure greatly. For simulation, macro finite element can’t consider the microstructure development fully and micro molecular dynamics can’t be used in macro engineering widely, so to investigate the material behavior of trip steel a multi-scale simulation framework which combined macro finite element simulation and micro molecular dynamics together was presented in this paper. The transformation technology between macro and micro simulation by internal variable was considered and macro displacement of integral point as boundary condition of micro molecular dynamics was discussed.
Research on Commercial Vehicle Clutch Release Bearing Fatigue Life Prediction Model
Authors: Chen Guo Liang , Chen Xiao Yang
Published: September 2013

Commercial vehicle clutch release bearings working at high speed, strong vibration,high temperature, damp and easy pollution conditions. Fatigue life analysis is based on the release bearing rings or rolling body began to appear fatigue spalling, in which this kind of phenomenon is under cyclic stress. The contact stress distribution is not uniform, the contact stress is mainly concentrated near the surface; influenced by the geometry and physical properties and lubrication of the surface significantly. Contact between the two types of fatigue crack extension methods: fatigue crack surface under expansion and surface fatigue crack propagation. The surface crack growth mainly originated from two kinds of cases: crack caused by surface pre crack and contact between the two surface asperity each other. New life prediction model for the release bearing based on L-P theory and Tallian model ,in which influence factors of fatigue life is introduced on the smelting process, surface defect, surface roughness, residual stress, elastohydrodynamic lubrication oil film,environmental cleanliness, temperature, the effect of varying load characteristics and other factors of fatigue life. The results show that: the clutch release bearing life prediction model of new and more close to the real conditions of automobile clutch, provide the theory basis for the development of a new generation high-speed heavy-duty clutch release bearing of the commercial vehicle.
Resistance Spot Welding Gun System Development Based on C# and Solidworks
Authors: Wen Xiu Lan , Liu Xue Long
Published: September 2013

In this paper, the type selection of resistance spot welding guns and 3D part drawings library are developed based on the C# programming software and Solidworks environment. It is called rswg-swc software system. The selection method of resistance spot welding guns is analyzed, 3D graphic library about the general parts and series parts of welding gun is established .Utilizing the user interface, input the necessary parameters to choose corresponding product model, product assembly drawings and part drawing are created in Solidworks.
The Research on Tool-Database Turning Stone Based on Pro/Toolkit
Authors: Wang Xiao Jun , Zhao Min , Zhang Yun Feng
Published: September 2013

The secondary development of Pro/E NC Processing tool-database is carried out by the use of Pro/Toolkit and Access2003, which is based on VC++. The study can solve the problem of inputting a great number of parameters during simulation processing, and can also realize parametric design of diamond saw blade. It is researched to extend the applying of the CAM model of Pro/E in the stone cutting processing. In this study, it is realized to communicate data sources of saw blade parameter, Pro/Toolkit procedures and MFC application program by DLL, in order to finish use of database by means of activating menu and dialogue box. All above makes the diamond saw blade library work during NC Processing. Because the function of Pro/Toolkit sdk is fully developed, the special requirement of the stone industry for Pro/NC can be satisfied.
Modeling and Simulation of Kinematics for Planar R-RRR-RRP Mechanism Based on Assur Rod Group Theory
Authors: Dang Xiao Zheng , Zhou Liang Sheng , Liang Dong
Published: September 2013

Planar multi-linkage mechanism is widely used in the manufacturing industry. In this paper, a kind of planar R-RRR-RRP mechanism is analyzed. The kinematics simulation model is established based on assur rod group method and then implemented for this kind of mechanism based on MATLAB/Simulink. Through simulation, the motion rules for the key part of mechanism (the end-effector) are obtained. The simulation results show that this method is effective and efficient when the simulation is implemented for a certain machine system. Meanwhile, it provides a foundation for design and manufacturing of the mechanism in the future.
Effect of Cracked Blade Distribution on Strength of Centrifugal Impeller
Authors: Cheng Gang , Li Jian Feng , Wang Wei Qiang , Sun Jie
Published: September 2013

In this paper, the finite element analysis is made to the structure of the impeller, a finite element model of a impeller with cracks was established. This paper presents results of the stress analysis of the compressor blade subjected to centrifugal force and aerodynamic equilibrium pressure. A nonlinear finite element method was utilized to determine the stress state of the blades. In this analysis, the numerical models without defects and also with cracks were defined. The simulation results showed that high stresses occurred in the areas where the cracks initiated under both centrifugal force and aerodynamic equilibrium pressure. The distribution of two cracked blades can greatly influence the stress level of the impeller; when two cracked blades locate in the adjacent positions，the increasing value of stress is minimum. When the two cracked blades separated by 150°, the increasing value of stress is maximum. It provides a basis for strength calculation of the impeller.
Simulation Investigation on Multi-Unit Parallel-Flow Type Condenser with Flat Tubes Distribution
Authors: Du Jian Rong , Zheng Zu Yi , Wan Jun Hua , Wang Yi De , Wan Zhong Min , Guan Qiong , Liu Jing
Published: September 2013

Three heat exchangers, all of which have 38 tubes in total and 6 passes, with different tube arrangements were simulation investigated in laboratory. The effect of flat tube distribution on heat transfer performance and pressure drop characteristic was simulation investigated. The effect of different air velocity and flow on heat transfer performance and pressure drop characteristic was simulation investigated too. The results show that similar tube distribution has little effect on heat transfer but has great effect on pressure drop. It was found the tube arrangement from first pass to sixth pass is 10,9,6,5,4,4 has the best heat transfer performance and its pressure drop is small. The heat transfer and pressure drop increase with the air velocity and refrigerant flow.
The Improved Design of Machine Tool Structure Based on Sensitivity Analysis
Authors: Wu Huan Qin , Wang Wei Qing
Published: September 2013

The machine tool bed is an important component of the center. The function is components of support column, worktable and so on. The machining accuracy can be influenced by the function machine tool bed. To establish the finite element model of horizontal machining center by Solid works. And the first six orders modal can be analyzed by Ansys. The dynamic sensitivity analysis is used to determine the parameters of stiffened plate by sensitivity optimization method. The better structure parameters can be getting by making a structural optimization design for the analysis. Finally, the dynamic characteristics and function of the machine tool bed can be improved.
Structural Optimization for Upper Beam of Isothermal Hydraulic Press
Authors: Wei Wei
Published: September 2013

A method of structural optimization for upper beam is proposed in order to satisfy the requirements of high stiffness and light weight of isothermal hydraulic press. Finite element analysis mold is established in ABAQUS by analyzing structural features and load conditions of hydraulic press. When original structure is retained, stiffness and strength of upper beam are checked based on finite element analysis mold. Key factors influencing stiffness and mass are extracted and analysis results are obtained by experiment design. Mathematical model for structural optimization is established by second order stepwise regression model. The goal of structural optimization is to increase stiffness of upper beam while mass is set as constraint. The stiffness of upper beam is increased by 7.04% and its mass remains unchanged basically when structural optimization is finished.
The Application of Slip Joint Use in Space Frame Structure for Vehicle
Authors: Lee Sheng Yun , Cheng Ting Hao , Lin Yu Ting
Published: September 2013

The purpose of this paper is to analysis the finite element model of joint methods for chassis space frames of vehicles. Common tee-joint often have poor control of dimensional accuracy. The analysis includes the common tee-joint and new joint method. Although the new joint method will increase in weight a little and easily adjust the accuracy of space frame, it will also improve the connection strength.
Research on SHCCT of Weather Resisting Plate for Vehicle
Authors: Zhang Shi Xin , Deng Xiao Jun , Liu Shao Jun , Wang Ming Yan , Gou Guo Qing
Published: September 2013

In order to help to design the bogies for vehicle, the morphology, microhardness and SHCCT diagram of SMA490BW high strength weather resisting plate was carried out. The morphology were ferrite and little pearlite and granular bainite of samples at different cooling speed. With the cooling rate increased, the t8/5 decreased but the hardness increased. The phase content was composed of pearlite, ferrite and bainite at lower cooling rate, but the phase content was totally composed of bainite.
The Processing Techniques of Common Guide Rod Used in Mines and its Jig Design
Authors: Yuan Chang Song , Hao Ze Long
Published: September 2013

Hydraulic supports series guide rod used in mines, a large quantity processing, low precision in the mass. According to field condition, work out mechanical processing, and designed tooling jigs for 3-D. Used a bumper pin and two V-shaped blocks to fix five point position, process hole 1 and hole 2, then used bolt type locator to realize six point full position, rotate the workpiece by 90° to process the third hole; used semicircular turnover type drill template, the drill template frame and the drill shell connect with T-shaped insert. modularized the drill plate; used eccentric wheel drives mobile platen clamping.
Practice and Analysis of Life Measuring Device for Motor Valve
Authors: Ding Wen Jie
Published: September 2013

Motor valve leakage is not easy to detect during using, so it must carry out quality inspection before assembly into gas meter. The quality appraisement of valve mainly relies on switch times before leakage, and pressure difference measurement is better method for leakage judgment. The static pressure leak detection method, reference gas chamber and control program of solenoid valve are key technologies in pressure difference measurement and life measurement. The new type device is designed with hardware and software, such as gas path and pipes, sensor, the solenoid valves of dynamic structure static switching unit, controller, gas pressure regulation system, automatic detection and valve switching process control program etc. Based on support of hardware and software, dynamic flow pipe is separated to static segments which are reference gas chamber and measuring air chambers; and the signal of chambers pressure difference and switch times without leakage are the output result. Switching frequency ratio of solenoid valves to motor valve is 1:5 or 1:10; lower ratio can prolong the service life of solenoid valves.
Simulated Sun-Light-Driven Degradation of Rhodamine B by Porous Peanut-like Sm-Doped BiVO4 Sub-Microstructures
Authors: Cao Bao Wei , Xu Yun Hua
Published: September 2013

Porous peanut-like Sm-doped BiVO4 sub-microstructures were synthesized via a hydrothermal process with bismuth nitrate, ammonium metavanadate and Sm (NO3)3 as raw materials. The crystal structures, morphologies, and optical properties of the as-prepared samples were characterized by X-ray powder diffraction, transmission electron microscope, scanning electron microscopy, and UV-visible absorption spectra. Simulated solar light induced photocatalytic degradation of Rhodamine B by porous peanut-like Sm-doped BiVO4 sub-microstructures have been investigated, and results show the 2% Sm-doped BiVO4 porous sub-microstructures with higher photocatalytic activity than other samples.
Development of Electrolyte Vacuum Surface-Boiling Electrodeposition Apparatus
Authors: Ming Ping Mei , Lv Wen Xing , Shang Jing Yu , Wang Jun Tao , Hao Qiao Lin
Published: September 2013

With the electrolyte in the vicinity of cathode surface being boiling, electrolyte vacuum surface-boiling electrodeposition is a kind of novel electrodeposition technology implemented in a vacuum environment. The development of its apparatus faces more design challenges in comparison with the ones served for the conventional electrodeposition techniques. To development this special epectrodeposition apparatus, two kinds of systems, namely, electrolyte circulation and filtration system driven by film-pressure and gravity, and condensation-collection-backflow system, were come up with, and their details were introduced in this paper. The applications show that the apparatu can meet the requirements of laboratory research and industrial production very well.
Critical Carbon Concentration and Excessively High Bath Temperature for Smelting Ferrochromium in the Argon-Oxygen Furnace
Authors: Han Ming Rong , Huang Long Qiang , Jia Bi
Published: September 2013

Some problems have seriously affected the implementation of smelting ferrochromium in the argon-oxygen furnace. This paper discussed reducing chromium loss and controlling excessively high bath temperature by thermodynamic analysis. The results show that the process is divided into two stages and the critical carbon concentration of its switchover point is controlled in the range of 1.5%-2% to reduce chromium loss; dynamic control of oxygen and argon supply by theoretical calculation and AI(Artificial Intelligence) technology and carbon dioxide blown by a lance with double channel as coolant instead of steel scrap and chrome ore can flexibly control furnace temperature.