bluuebunny/crossref_metadata_2025 huggingface dataset:
The Influence of D-SRRs’ Geometry Dimension on the Resonant Frequency in the LHMs
Authors: Wu Jun Fang
Published: December 2011

The study on left-handed materials (LHMs) is a international research hot spot in recent 10 years, the LHMs have important application value in many fields, the study of resonance frequency is the focus of LHMs. Periodic split ring resonators (SRRs) structure is one important method of realization LHMs. The further research of the periodic SRRs structure LHMs is very necessary, the practical value and theoretical value. D-SRRs basic structure new LHMs is put forward, the negative refraction effect of the prism experiment is simulated by D-SRRs basic structure new LHMs. By changing the D-SRRs’ geometry size, the influence of the D-SRRs’ geometry size on resonance frequency of the of the new LHMs is discussed. When D-SRRs’ geometry size is smaller, the frequency response shifts from low frequency response to high frequency response, and frequency response is broadened. These results is great significance for realization LHMs near infrared and visible light.
Study on the Kinetics and Optimization of Technological Process of Microwave - Vacuum Drying of Bleached Shellac
Authors: Zhang Hong , Yu Lian Song , Zheng Hua , Feng Ying , Chen Xiao Ming , Chen Jun , Zhang Wen Wen , Liu Shi Ping
Published: December 2011

To enhance the product quality and production efficiency, we studied the kinetics of the microwave - vacuum drying of bleached shellac and optimized its technological process. Through the test, the drying curve, drying rate curve and drying constant of the bleached shellacs under different pressure were obtained and through the drying curve fitting, the drying model was obtained. And through the optimization test, the optimal conditions for the microwave - vacuum drying of bleached shellac were obtained, that is, pressure of 3000Pa, microwave power of 700W and drying time of 25min, then the products of color index of 0.9, water content of 0.0296 kg water / kg dry materials were obtained.
Study on Surface Modification of Pure Magnesium and Magnesium Alloy with High Current Pulsed Electron Beam
Authors: Ye Hong , Chen Rui , Yan Zhong Lin
Published: December 2011

Pure magnesium and AZ31B magnesium alloy were irradiated by a high current pulsed electron beam (HCPEB) device with pulse times 10, 15 and 20 respectively. The microstructure changes of the surface and modified layer after HCPEB treatment were investigated, and the evolution of temperature field during the electron beam modification process was numerically simulated based on experimental and theories. Numerical simulation analysis is close to experimental results and the special surface morphology arising from treatment is interpreted.
Study on the Heat-Oil Resistance Capacity of Surface Chemically Modified Nitrile Rubber
Authors: Han Heng , Wang Shi Jie , Lv Xiao Ren
Published: December 2011

After Fluoride, Bromide, Iodide treatment and mixture treatment on the surface of nitrile rubber, the reaction mechanism and threatment effect on the heat oil resistance of nitrile rubber are explored. Several methods are introduced to compare the modification effect, and the SEM equipment is adopted to analyze the reasons. The results show that, Fluoride, Bromide, Iodide treatment on the surface of nitrile rubber, did not significantly improve the oil resistance of the material, but mixture treatment made NBR oil resistance improved significantly. Chemical treatment, especially fluoride treatment and mixture treatment, can significantly improve the tensile strength, elongation, hardness and other physical properties.
Effect of Refractory᾽s Thermal Expansion Coefficient on the Stress Field of the Top of Gasifier
Authors: Xue Wen Dong , Huang Xiao Xiao , Xie Jing , Liu Gang
Published: December 2011

The top of COREX-C3000 gasifier was simulated with a finite element analysis technique. It is studied of the influence of thermal expansion coefficient of the refractories on the temperature field and stress field and the function discipline with different parameters. The results of the simulation indicated that when the coefficient of thermal expansion of working lining and permanent lining are respectively 3.5×10-6/K and 4.5×10-6/K, the distortion and initial stress of the gasifier top are much less.
Fire Hazard Research of Aluminum Cable Joint
Authors: E Da Zhi , Zhao Chang Zheng , Di Man , Xia Da Wei
Published: December 2011

On the basis of fire hazard simulation study of aluminum cable joint, it reveals that large contact resistance at cable joint can induce high temperature, and easily ignite combustibles then catch fire. Through macro-examination and metallographic analysis about the melted marks of aluminum cable joint, it clarifies the formation mechanism of the melted marks, and the corresponding preventive measures which can prevent cable fires, provide a practical and reliable scientific basis to guarantee the safe operation of power system.
Minimum Mould Exit Shell Thickness of Round Blooms for Peritectic Steel Casting
Authors: Sun Li Gen , Li Hui Rong , Zhang Jia Quan
Published: December 2011

The minimum mould exit shell thickness (MEST) is one of key factors to consider for continuous casting machine design and the strand cooling schemes. Based on the shell strength at elevated temperatures, a concept of shell integral average strength, from its very top surface to the solidus frontier, has been introduced to judge its bulging tendency under ferrostatic pressure. Considering the contribution to the shell stability, a mathematic model for the determination of the minimum MEST has been brought forward. It is shown that, the minimum MEST of the round bloom is decided by not only the cross section and the minimum roller spacing, but also the opening degree of the support roller and the support roller on the side. Taking a round bloom casting of plain carbon steel (grade Q235) as an example, there is the cross point with the curve of the minimum MEST by the minimum roller spacing and the minimum MEST by the fluting include angle of the support roller and the support roller on the side against the cross section, if its own geometry structure cannot hold the ferrostatic pressure, the minimum MEST on the left of the cross point can remain as the determined amount by the minimum roller spacing; but on the right, it is increased with the increasing width of cross section.
The Design of a New Type Oblique Suspended Elevator Platform
Authors: Hou Ming Wei
Published: December 2011

With the development of society, the services which the country supplied for the elderly and handicapped also continues to strengthen, and the oblique suspended elevator can solve the problem which the elder and handicapped walking up and down the stairs. This paper introduces the structure design project of an oblique suspended elevator platform, around the design and development of the whole platform, we make the structure design of the every part including the push device, and make the strength check of the key component.
Cutting Part Research of Machine for Cutting Mulberry Branch
Authors: Sun Yong Hou , Lai Ren Sheng , Jin Guo Cai
Published: December 2011

Cutting part is a key part of machine for cutting mulberry branch. The cutting part structure could influence quality and efficiency of machine for cutting mulberry branch, directly. To obtain a suitable cutting part structure, research of cutting part of machine for cutting mulberry branch is implemented in this paper. Firstly, the stress situation of mulberry branch is analyzed through different cutter blade shape. A kind of cutter blade shape is got from the analysis result. Then this kind of cutter is used to build a cutting model. The cutting model is used to make dynamics simulation for the cutting process and analyze the cutting process through the ANSYS/LS-DYNA software. The curve figures got from the simulation result also provide certain reference for the design of cutting part.
A Variant Design Method of Assembly Based on Tree Structure
Authors: Zhao Hai Xin , Liu Fu Yun , Sun Ying , Xu Kun
Published: December 2011

In the current market demand of rapid response manufacturing, the product variant design technology is one of the key technologies. Product variant design principles and methods are first described. Then, product dimension parameter is analyzed and product dimension parameter transferring structure is studied. Applying tree theory to product variant design, a dimension relation driving-tree of components and parts is constructed and the significance of driving-tree statistics and a dimension parameters transfer method are presented. The methods and processes which are applied to variant design and the sorting algorithm of relations are described in detail. A parameterized variant design module integrated with SolidWorks was developed with VC + +. All the above mentioned methods and processes are verified by taking a joint coupling product as an example.
Effect of Microwave Drying on Cure Characteristics of Natural Rubber
Authors: Wang Yong Zhou , Zhang Fu Quan , Chen Mei , Huang Hong Hai , Huang Mao Fang , Zeng Ri Zhong
Published: December 2011

In this work, the cure characteristics of nature rubber (NR) dried by microwave and hot-air were analyzed by using Vulcameter. The effect of curing temperature on induction period (tC10), optimum cure point (tC90), maximum Torque (MH) and minimum induced torque (ML) were studied. The results showed that the tC10, tC90 and ML of NR dried by hot-air were bigger than those of NR dried by microwave, however, the MH of former was bigger. And the tC10, tC90 of NR dried by microwave or hot-air can fitted Arrhenius equation well, the K1, K2 and K of Arrhenius equation coefficient for NR dried by microwave were all bigger than those of NR dried by hot-air. With the increasing of curing temperature, the MH of NR dried by microwave or hot-air decreased gradually and its trend was well satisfied with linear relationship, and the MHo of NR dried by microwave was bigger than hot-air drying.
Facing the Dynamic Performance of Machine Tools for the Optimization of Column
Authors: Lun Guan De , Liu Yan Cong , Yi Peng , Qu Yang
Published: December 2011

Structure Dynamic Design theory, including its core analysis of the results of the mechanical properties and structure optimization, in order to ensure the reliability of the structure, improve the use of equipment reliability, improve efficiency provides a strong theoretical support. By the method of variable analysis focuses on the reinforcement plate column, door-type column constrains represented by a single-ended cantilever dynamics with different structures, parameters of the relationship, and for YK2275 column structure is optimized, make the first three natural frequencies varying degrees of increase, an average of 10%.
Development and Application of Off-Line Simulation Software for Hot Strip Continuous Rolling
Authors: Wang Tao , Yuan Zheng Wen , Xiao Hong , Qi Xiang Dong , Yuan Gong Ming , Ren De Fang
Published: December 2011

Off-line simulation software of hot strip continuous rolling is developed by taking rolling schedule and strip shape as main modules. Based on theoretical models and modularization design, the simulation system which has friendly interfaces and efficient kernel is established by using Visual Basic as visible platform and C++ as source code language. By contrast, the results calculated by the software are reliable, it adapts to mill types selection and technology quoted of hot rolling. The software improves efficiency for designer and has high practical value.
Finite Element Analysis of Marine Diesel Engine Frame
Authors: Yuan Guang Jie , Sun Jie , Luo Jun
Published: December 2011

Taking the marine low-speed high power diesel engine frame for example, created a three-dimension model through UG. By using the finite element software ANSYS investigated the body’s stress status and displacement which provides a valuable reference for the structural optimization of the cylinder block of diesel engine’s design.
Plane Reverse Based on Coordinate Measuring
Authors: Yang Mei , Sun Hong Qiang , Cui Jing Hua
Published: December 2011

Plane is a basic element to constitute the part and a benchmark to assess shape and position error. It’s precision directly influence to components processing flatness and shape position error's evaluation precision. Therefore carries on measuring and reversing in the manufacturing process is very meaningful to improve manufacturing precision. Using the smallest region principle to reverse plane compiles a system of measuring and reversing based on machining center, it can not only raise the machining center use efficiency, but also can increase the online working accuracy.
The Synthesis of Comb-Like Polymeric Prodrugs of 5-Fluorouracil Derivatives
Authors: Qiu Fei , Yan Hui , Wei Lin , Diao Yong
Published: December 2011

Two comb-like polymeric prodrugs of 5-fluorouracil derivatives (p(MAA-PEG400-5Fu), p(MAA-PEG2000-5Fu)) were synthesized from monomers, methacryloyl (polyethylene glycol 5-fluorouracil acetyl) (MAA-PEG-5Fu) through radical polymerization using azobisisobutyronitrile (AIBN) as initiator in N,N-dimethyl formamide solution, which structures were confirmed by means of IR, 1HNMR, UV-Vis, MS and GPC spectroscopy. The drug loading rates of the two prodrugs (p(MAA-PEG400-5Fu), p(MAA-PEG2000-5Fu)) were 25.51%, 10%, respectively.
Topological Optimization Design of Cistern Stents of the Planomiller Machine Based on Hyperworks
Authors: Liu Fu Yun , Sun Ying , Yu Tian Chao
Published: December 2011

Planomiller is a milling machine that widely used in processes of large parts. Cistern stents is a component of planomiller supporting the sink. In this paper, topological optimization of Cistern stents is implemented to reduce its weight. Firstly geometry model of Cistern stents is built in SolidWorks, a finite element model of Cistern stents is established. Then loads and boundary conditions are loaded to the finite element model according to engineering practice. Finally density of units is set as the design variables, energy of structural deformation is set as the objective function, Cistern stents can be optimized by optimizing analysis. The compared results show that the proposed optimization design is effective.
Analysis on Wet Multi-Disc Brake Based on ABAQUS
Authors: Jiang Jun Sheng
Published: December 2011

In this paper, take the wet multi-disc brake of underground engineering truck as research object, combined with the complex modal analysis theory and FEM, and establish the FEM model of the wet multi-disc brake based on ABAQUS. Through complex modal analyzing on the wet multi-disc brake, obtain the main factors of brake noise during braking and provide improved measures to decrease the brake noise combined with analysis results. It provides a theoretical basis in the design of wet multi-disc brakes and has a practical engineering significance.
The Degradation Regulation and Numerical Simulation of Ammonia Nitrogen in Semi-Aerobic Landfilling Leachate
Authors: Pang Xiang Rui , Huang Qi Fei , Pang Xiang Duo , Wang Jie , Wang Jian , Liu Qiang , Zhang Guo Dong , Zhou Wei Jie , Tang Hai Yang
Published: December 2011

The semi-aerobic landfill and anaerobic landfill simulation experimental devices were constructed. The leachate that lay at the bottom and space horizon of two landfilling devices was sampled periodically, and the content of ammonia nitrogen (Recorded as C(NH3-N)) was determined. Based on the monitoring data of the leachate that were located at bottom of devices in the 69 th week, the rule of C(NH3-N) that came from the bottom of the two landfilling devices with time change was simulated, and its reasons for the differences were compared and analyzed; the monitoring data of the upper, middle and lower C(NH3-N) were processed during the stable operation phase of waste degradation by using Sufer and Excel software, then the spatial variability and differences of leachate C(NH3-N) of two landfilling devices were discussed. The experimental results indicated that the content of leachate C(NH3-N) that located at upper, middle and lower layers as well as the bottom of semi-aerobic landfill were lower than the corresponding layer of the anaerobic landfill. Compared with the structure of anaerobic landfill, the semi-aerobic landfill structure could accelerate the balance and stability process of leachate C(NH3-N), and the content of leachate C(NH3-N) was reduced effectively.
Optimization of Injection Molding Parameters for Plastic Part Using Taguchi-TOPSIS Method
Authors: Yang Shie Chen , Tsai Feng Che , Mao Tsuo Fei , Benna Amine Ghali , Huang Ling You
Published: December 2011

This paper reports an simulation study to improve the shrinkage of plastic automobile part by optimizing the injection molding parameters using the Taguchi-TOPSIS method. The Reverse Engineering(RE) and rapid prototyping (RP) technique were used to modelling and createing a prototype model of plastic automobile part. Employing the finite element software, MoldFlow Plastic Insight, the effect of injection parameters on the warpage and shrinkage of plastic part were examined carefully. The simulation results show that Taguchi-TOPSIS method provided an outstanding result for the optimization of injection parameters to produce minimum volumetric shrinkage. The injection parameter of melt temperature was the most significant parameter that influences the warpage and volumetric shrinkage for plastic automobile part in this study.
Mathematical Model Research of Intelligent Rapid Testing System for Textile Materials Moisture Regain
Authors: Yin Xiang Gang , Ge Wei Wei
Published: December 2011

Because there exist some disadvantages of the traditional moisture regain testing method (oven drying) for textile materials, such as longer testing period, higher energy wastage, laboring intensity, and inefficient, a new instrument i.e. moisture regain rapid testing system has been researched, designed and manufactured for raw silk in this project. This system can record real-time the weight of raw silk sample during the drying in the certain environment oven. The index prediction model has been developed based on the accumulating generation operator (1-AGO) after the data have been pretreated. According to this model, the percent of error is only 2.09% between the predicted value and actual result of raw silk moisture regain within the drying cycle of 40min by the rapid testing system.
Job-Shop Manufacturing Execution Process Monitoring Technology
Authors: Yuan Hong Liang , Wang Ai Min , Lei Jin Fan
Published: December 2011

According to the production characteristics of single piece and small batch production and the combination of production and research in aerospace workshops, this thesis has made an in-depth study of job-shop manufacturing execution process monitoring technology with strong adaptability. A model for visual manufacturing process monitoring based on process route was proposed, it realizes the job-shop production featured by entire staff participation, entire process management and omnibearing warranty.
A Circuit Milling System with Pixel Based Algorithms
Authors: Wang Ke , Zhang Cheng Rui , Liu Ri Liang
Published: December 2011

This paper presents a circuit milling system, which integrates CAM functions and gives a good performance for flexibility and changeability. Gerber format files are described and read into some data structures that support centerline shape representation. The pixel based algorithms are used to get contours, get contour-parallel tool paths, detecting uncut regions, and also used to calculate the tool radial compensation. The precision is discussed and is proved feasible for circuit milling. The milling operation is divided into isolating and hollowing operations to make the process planning more flexible. The detailed algorithms of isolating and hollowing are given, which contain contour-parallel offset and direction-parallel tool paths. Hollowing supports multi tools to promote the efficiency. All the processes such as drilling, isolating, hollowing and cutting off are given in detail.
The Design and Simulation Test Research of Electrical Mechanical Brake
Authors: Zhang Zhu Lin , Dai Ru Quan , Zhou Chang Feng
Published: December 2011

The Electrical Mechanical Brake(EMB) is advanced with plenty functions of ABS, TCS and ESP etc. EMB has a very good development prospect for its good reaction speed and reliable performance as well as easy installation maintenance. It is necessary to study the method of design and simulation of EMB. First, the structure, working principle and the related parts mathematical model of EMB were introduced and the mathematical model of motor was built; second, virtual prototype model of EMB was designed in Pro/e software and developed with constraint and parameter set in adams software; finally, we built the co-simulation model of EMB using adams and Simulink and chosen a certain vehicle type to analyze and verify. The result shows that this method is efficient and feasible.
An Effective Method for Manufacturing Data Integration Based on Resource Model
Authors: Xu Bo Yi , Xie Ling Qi , Bu Feng Lin
Published: December 2011

During complex manufacturing process, various manufacturing information systems and management information systems are often existing as heterogeneous systems, and manufacturing data is distributed everywhere across the whole value chain of the enterprises. One of the most valuable targets in the integration of these manufacturing information systems is the sharing of enterprise resources which are described in different formats in different information systems. In this paper, meta-resource model is extended using workflow to combine enterprise resources together with business process during manufacturing. Then, an effective method of data integration is proposed based on the meta-resource model. In the proposed method, heterogeneous data is encapsulated in unified format of resource and binding with workflow so that data resources could be accessed according to the business process of manufacturing. Finally, case study shows that the resource-based data integration approach is more robot and flexible than traditional data integration method, especial under the environment of complex manufacturing.
Influence of the Blank Contour to Drawing Deformation of the Oil Tank with 304 Strainless Steel
Authors: Sun Zhi Qiang , Zhang Yu Xin , Li Yong , Zhang Rui Zhu , Zhong Yi
Published: December 2011

Obtains the best deep product for the choice suitable blank dimensions, process structure and profile of the oil tank part has been analyzed, and has carried on numerical simulation target-oriented of the box bulkhead by the MSC.SuperForm software. Has studied the influence on blank with different radius of curvature and length to equivalent strain and drawing strength of 304 stainless steels, the optimization obtained the best size, voided flaw arousing because of blank size
A New Evaluation Approach to Mechanical Kinematic Concept Using Fuzzy Neural Network
Authors: Wu Jian De
Published: December 2011

In this paper, BP network is applied to structure multi-level evaluation model to implement evaluation for the kinematic concepts acquired by function analysis. Under this approach, the best concept can be selected once evaluation indicators of each candidate are fuzzily quantified, converted into evaluation attribute value, and fed into the trained network model. During the process, neural network is used to solve the bottle-neck problem of knowledge acquiring and expression, which can be viewed as knowledge base and reasoning engine for the evaluation. At the same time, it is effective in solving the problem of weight distribution in evaluation indicator system. Fuzzy logic is used to achieve the fuzzy quantization for the attribute value of evaluation indicator in evaluation system, which can be used as the I/O value for neural network.
A Probe into the Interesting Design of Products
Authors: Chen Shu Cong
Published: December 2011

In recent years, emotionalized design has become a hot topic in the field of industrial design. However, as one major part of emotionalized design, interesting design has not been researched into individually. On the basis of ensuring the function of products, interesting design of products puts emotion onto the product, and the product can express a special sort of emotion. Therefore, the emotion of the product user is motivated virtually, and the product user will accept and love the product. This paper have researched the issue of “interest”, and discussed the potential rule and possible extension in the interesting design of product from another viewpoint.
Research on Existences and Concept System of Mirror Symmetry in Static Structure of Mechanical Products
Authors: Ma Zhi Yong
Published: December 2011

Mirror symmetry is a most common phenomenon in static structure of mechanical products, and plays an important role in realizing the function of mechanical systems, improving their performance, and meeting their design restrictions. On the basis of analyzing plentiful instances, the existences of mirror symmetry were studied. By taking the independence property of symmetry components, the type of symmetry benchmark and the number of symmetry benchmark as standards, the concept system of mirror symmetry in static structure of mechanical products was established, and can provides a theoretical basis for the further comprehensive research on the application laws of mirror symmetry in mechanical systems.
Research on Fuzzy Self-Tuning PID Control in Electric Power Steering System
Authors: Lu Wen Chang , Zhang Qing Lu , Long Chen , Wang Ruo Chen
Published: December 2011

In order to further improve control accuracy, response speed, and the steady performance of the electric power steering system, this article based on dynamics model of the electric power steering system, designed a new assistance control strategy, advanced a control policy combining fuzzy control with PID control, and established a simulation model of EPS. This paper simulated the fuzzy self-tuning PID controller by Matlab, and compared with conventional PID control. Simulation results showed that the control method improves the system to control speed and performance, has good control performance.
Design of Automatic Defrosting and Dehumidification System in Greenhouse
Authors: Liu Yuan , Yu Ya Ping , Chang Ruo Kui , Du Yan Hong
Published: December 2011

Analysis of the relationship between defrost and the temperature and humidity. The design is SCM for the control of the core, to improve the greenhouse wall surface temperature, is used for defrosting, coating and ventilation dehumidification. Thus, achieve the purpose of defrosting and Dehumidification. Practice is proved that the system is less affected by environmental factors and has wide range of applications.
Portable Measurement Method of Loose Coal Thermo-Physical Parameters
Authors: Chen Qing Hua , Dai Guang Long , Zhang Guo Shu
Published: December 2011

According to the status that most of the present measurement methods and systems should be make experiments in laboratory, which need collect samples from spot, then carry to laboratory. Base on parallel hot wired method theory and single-chip technology, conduct a research on portable measurement method of loose coal thermo-physical parameters, then can test thermal conductivity and diffusivity of loose coal out of laboratory, the measurement system is developed. The experiment shows that results of thermal conductivity and diffusivity are well repetition, and agree with the reference value of relative literatures. The application of this system will provide convenience for occasion that need get the loose coal thermo-physical parameters quickly.
On-Line Monitoring System for Monitoring SO2 in Fumes（2） — Monitoring Subsystem for SO2 Flow Velocity and Flow Rate
Authors: Wang Shi Long , Wang Li Na , Cai Yong Hui , Wang Hong Bo
Published: December 2011

A SO2on-line monitoring system (CEMS) has been developed by the author based on the principle of electrochemistry. This system consists of SO2mass concentration monitoring subsystem (the subsystem had been described in on-line system for monitoring SO2in fumes（1）) and SO2flow velocity and flow rate monitoring subsystem. In the paper, the working principle and procedure of SO2flow velocity and flow rate monitoring subsystem are described in detail. In the meantime, an advanced method for measuring average flow velocity of fumes by mean of “velocity field constant” is presented. A innovative device has been developed to detect velocity field constants automatically, which has resolved the technical difficulty in automated monitoring of fumes average velocity in the flue.
Research, Development and Application of Surface Displacement Automatic Monitoring System of Tailings Dam
Authors: Ouyang Zhen Hua
Published: December 2011

An effective monitoring system is conducive to grasp the dynamic evolution process of disaster occurring, to study the disaster-mechanism, to forecast the future development trend and ultimately to predict the disaster occurring. In this paper, focused on the surface displacement, an automatic on-line monitoring system of tailings dam which based on GSM/GPRS communication platform has been researched and developed. As a part of tailing pond disaster monitoring system, the researched and developed monitoring system could monitor the surface displacement of tailings dam automatically and remotely, and also can collect deformation data regularly and transfer to distant control center real-time. According to its application in an iron tailings dam in Diaxian, Shanxi Province of China, the researched and developed monitoring system could achieve the same monitoring effect with the electronic total station. This automatic monitoring system provided another method to grasp the dynamic evolution process of tailings dam from stability to failing down.
Fault Diagnosis for Ceramic Balls Test Rig
Authors: Zhou Jing Ling , Ren Yu Song , Li Yu Jing , Zuo Wei Ming
Published: December 2011

The RCF life of bearing balls is a main method to evaluate the performance of bearing materials and their production technology. In general, the RCF life of ceramic balls is a reliable technique to asses whether or not they are suitable to be used in rolling bearings. The rolling contact fatigue test has practical characteristic. The long time, noise heavy make the tester tired. The fault occurring, the chain reaction is generated. The test rig destruction is strong unless quick treatment. The characteristic frequency of test rig rotating member is calculated. The fault is diagnosed by characteristic frequency. The test indicated that the fault diagnosis accurate, effective and feasible.
Study on Control System of Real-Time Interactive Movement of Three-Dimensional Solid Model
Authors: Liu Bo , Li Qin , Li Fu Bao
Published: December 2011

In order to achieve real-time interactive movement control of three-dimensional solid model, using ultrasound features to achieve its function; established real-time interactive motion control models of three-dimensional solid model, and through the circuit design, it achieved transmit and receive of ultrasonic, so that it achieves real-time interactive movement control of three-dimensional solid model.
Application of Electronic Nose in Tea Quality Recognition
Authors: Zhang Hong Mei , Chang Fen Ling , Yu Yong Chang , He Yu Jing , Li He , Chen Xin Chang
Published: December 2011

The current study uses the electronic nose FOX 4000 to inspect Xinyang Maojian tea in three quality levels. Principal component analysis (PCA) and statistical quality control (SQC) are adopted to analyze and recognize the data. PCA shows that there is a certain difference in the odor of the tea samples in the three quality levels. PCA can evidently distinguish three kinds of samples. SQC analysis shows that X800 and X600 are located outside the controllable range, indicating that they differ from X1200 in odor. This result is consistent with the PCA result. The study shows that electronic nose technology is expected to be applied widely in the rapid detection of tea.
Advanced Materials Used in SGCC ECCS Flyaway
Authors: Liu Feng , Li Jian De , Qi Shu Qing , Jiao Yang , Wu Jin Liang
Published: December 2011

This article introduces some advanced materials used in SGCC ECCS (emergency command and communication system of state grid), and some materials newly used in this system. It also gives some indication of advanced materials development in SGCC ECCS.
Study on Calibration of 3-UPS/S Parallel Kinematic Mechanism
Authors: Han Xian Guo , Wan Shu Chen , Tian Ming Rong
Published: December 2011

The calibration of a 3-UPS/S parallel kinematic mechanism using the laser tracker is presenter. Because the workspace of the joints are small when the mechanism is in its fully assembled state. The coordinates of the base and platform joints are measured in the base and platform assembly module respectively. The measurement is based on sequential determination that takes a fixed-point as the center of a sphere and rotates a target reflector fixed on a strut to envelop a sphere. In addition, to make the moving platform keeping horizontal while the mechanism is in its initial state, a horizontal plane is fitted during calibration.
Inverse Analysis of Surrounding Rock Mechanical Parameters Based on LS-SVM
Authors: Li Xiao Long , Wang Fu Ming , Zhong Yan Hui , Guo Cheng Chao
Published: December 2011

Inverse analysis is regarded as an ideal way to achieve the mechanical parameters of rock mass using in situ measured deformation data of surrounding rock during the construction of underground engineering. Aiming at the disadvantage of high computational complexity when identifying mechanical parameters of surrounding rock by employing the inverse method based on standard support vector machine (Vapnik’s SVM), a new back analysis method based on least squares support vector machine (LS-SVM) was presented. The basic principle of the method was introduced. An example was adopted to investigate the practicality and reliability of the method, and the calculation results indicated that, compared with the inversion method based on standard SVM, the method proposed in this paper possesses higher calculation efficiency and inversion precision.
Experiment Study on Laser Jamming CCD Detectors
Authors: Liu Yan Wu , Wang Yong Qiang , An Wen
Published: December 2011

In order to confirm laser jamming effect on CCD detectors, experiment study on laser jamming CCD detectors was accomplished on axis and off axis. Pixel saturation threshold and saturation power density threshold were measured. Jamming image on axis was processed with computer. The relation curve was described between laser incident energy and CCD saturation area ratio. Jamming image off axis was also processed with computer. The relation curve was described between laser incident angle and CCD saturation area ratio. The experiment result shows that laser jamming CCD imaging guidance weapons is feasible.
Spatial Finite Element Analysis on Bailey Trussed Girder of a Road
Authors: Weng Yan , Cen Mei , Xu Ya Guang
Published: December 2011

A simple box girder bridge with spans 25m is being constructed on the No.2 road of a project of PanZhiHua Steel. A Bailey trussed girder is constructed under the bridge to assist its construction. The paper makes spatial finite element analysis about the Bailey trussed girder. Firstly, the spatial finite element model is built. Then the force, stress and displacement of the girder under six box girders’ self weigh and the construction load are analyzed in detail. Lastly, the construction scheme is optimized. After optimization, all indexes of Bailey trussed girder can meet code requirement.
Effect of Heat Treatment Parameters on the Hardness of Soil Working Parts
Authors: Du Yong Ying , Guo Yu , Wang Yu Ning , Yin Ming Ang
Published: December 2011

The experiment of the hardness property for 65Mn spring steel under different heat treatments is conducted. The results are discussed based on the regression orthogonal design. The hardness property of 65Mn steel has been discussed by applying diverse heat treatment technology and the optimum parameters of heat treatment for the best hardness value are obtained through experiments. The influence of the parameters on hardness property is studied by applying the regression orthogonal design. The relation between the hardness and diverse heat treatment parameters has been given by using planar figure. The optimum heat treatment parameter for maximum hardness ability is obtained as following: 851.4°C for quenching temperature, 18 min for quenching time, and 146.4°C for tempering temperature, respectively. The result showed that the selection of material heat treatment process parameters has a great influence on the hardness of the material, which will provide a reliable basis to further study the wear resistance of material.
Implications due to Different Loading Programs in Inelastic Materials
Authors: de Angelis Fabio , Cancellara Donato
Published: December 2011

In the present paper the effects of different loading procedures on the response of rate-sensitive inelastic materials are analysed. The elasto/viscoplastic model problem is developed by taking advantage of the postulate of maximum dissipation in order to derive an associated formulation of the evolutive laws. A non-dimensional loading program parameter is introduced which accounts for the loading procedure and the intrinsic properties of the material. An appropriate solution method is applied and specific numerical examples are reported so that the implications due to different loading programs on the inelastic behaviour of rate-sensitive materials are suitably illustrated.
A New Design of Triaxial Test Chamber with Temperature and Pressure for Deep Rock
Authors: Wang Yong Yan , Qin Nan , Li Jian Guang , Li Ying
Published: December 2011

According to the research of existing triaxial testing machine of deep rock, a new test chamber with temperature-hold and pressure-tight is developed.The features of test box are as follows: a new kind of axial displacement test system with outer embedded type is designed for measuring the axial displacement of samples correctly; the circuit of oiling system is used to keep temperature and pressure; it’s convenient to take down the test box from the machine and the other functions of testing machine are not affected. So the availability factor of instrument can be improved. Finally, the thickness of cylinder wall is calculated, and according to the modeling and finite element analysis based on ANSYS, the results show that the cylinder can meet the working requirement.
Design of Technical Water-Supply System for Hydropower-Station
Authors: Cen Mei , Weng Yan , Li Jian
Published: December 2011

In this text, analysis of the scheme comparison shows how to design the technical water-supply system by setting a hydropower-station as an example.
The Experimental Study on Fluid Heat Transfer Characteristics in Narrow Annuli
Authors: Yan Shao Feng , Bian Xiu Juan , Sui Bo Yuan
Published: December 2011

Heat exchanger of Sleeve type was used in the experiment with water for working medium, hot water inside of tube, cold water outside of tube, For ring gap of 0.50mm~2.50mm, Reynolds number range in 7000, the heat transfer characteristics of the fluid of narrow annular channel was made by doing experiments and study. According to the result of the experiment, heat transfer coefficient and Reynolds number of function relation curves of Re-and Re-K are made. It was found that narrow ring channel has the remarkable strengthening effect with compact structure. Decreasing of the narrow gap dimension, the heat transfer coefficient increases.
Effects of a High Magnetic Field on Austenite Decomposition in High Purity Fe-1.1C (wt.%) Alloy
Authors: Zhang Xiao Xue , Zhang Yu Dong , Gong Ming Long , Esling Claude , Zhao Xiang , Zuo Liang
Published: December 2011

The effects of the 12T magnetic field on transformed morphology and crystallographic characteristics of high purity Fe-1.1C (wt.%) alloy during diffusional decomposition of austenite are studied by SEM/EBSD. With the applied field, the lamellar spacing of pearlite is greatly enlarged and the spheroidization tendency of the pearlitic cementite is enhanced. This can be attributed to the thermodynamic effect of the field on phase equilibrium by elevating the eutectoid temperature; hence the eutectoid transformation happens at higher temperature that favors carbon diffusion. As a consequence, the eutectoid cementite that is usually in lamellar shape spheroidizes to reduce its specific surface area. In addition, three orientation relationships between ferrite and cementite in pearlite, namely Isaichev ORs and two near Pitsch-Petch ORs (P-P1 and P-P2), are found both in non-field and field treated specimens. The magnetic field favors the occurrence of P-P2 OR due to the promotion of nucleation of the pearlitic ferrite. However, there is no obvious effect of the field on the crystallographic orientation of pearlitic ferrite, and that is probably related to the quick saturation of magnetization that results in the disappearance of magnetization anisotropy.
Effect of Mn on <100> Texture Evolution in Fe-Si-Mn Alloys
Authors: Sung Jin Kyung , Park Se Min , Shim Byoung Yul , Koo Yang Mo
Published: December 2011

The texture can be evolved through the γ to α transformation by cooling in Fe-Si alloy systems. Oxygen in the annealing atmosphere hampers the evolution of the texture. The texture evolution is associated with the fact that the {100} faces are elastically compliant so that the texture can develop in a manner consistent with minimization of strain energy. By alloying Mn to Fe-Si alloys, the texture evolves in relatively high oxygen containing annealing atmosphere. The role of Mn in the texture evolution appears to be preventing formation of surface oxides, which modify the elastic modulus of metal surface, thereby suppress the development of the correct texture.
Study of the Impact Properties of Steel 25Mn
Authors: You Da Yong
Published: December 2011

The Charpy impact test、hardness test、microstructure and morphology analysis of impact fracture by SEM were introduced to research the difference of impact toughness on 25Mn, which were in the station of hot-rolled、normalized and quenched & tempered. The resulted showed that the changes of load、deformation and energy exhaust in difference stage of deformation and fracture could be gained by Charpy impact test. 25Mn in quenched & tempered has more deformation resistance and deformation property than which in other stations. The total impact values was 6J higher than which in normalized in average, however, the crack propagation values was 16.78J higher in average. Ductile-brittle property of the material can be estimated by the analysis of crack formation values、crack propagation values and fracture morphology on samples.
Arbitrary-Order Spherical Harmonics Method for Coupled Heat Transfer in Semitransparent Materials
Authors: Wang Yan Ming , Wang De Ming , Zhong Xiao Xing , Shi Guo Qing
Published: December 2011

An advanced numerical model and its application in thermal processing of nonlinearly anisotropic scattering semitransparent materials are presented in this paper. The decomposition of the radiative transfer equation is deduced using spherical harmonics (PN-approximation) method. Considering the transient problem, coupled radiative and conductive heat transfer model based on arbitrary-order PN-approximation method is established. With the coupled model, the calculation accuracy of high-order PN-approximation method is verified through comparison with theoretical solution and by the simulation results of other methods. Comparison shows that the arbitrary-order PN-approximation method reproduces results with a high accuracy for linear and non-linear anisotropic scattering, while it can easily treat the nonlinear anisotropic scattering phase functions with desired order. Keywords: semitransparent material, coupled heat transfer, numerical simulation, spherical harmonics method
Research of Inclination Angle Effect on Joint Rock Macromechanical Parameters
Authors: Feng Yan Feng , Yang Tian Hong , Wei Hua , Gao Hua Guo , Zhang Zhe
Published: December 2011

The joint of rock mass influences and controls the rock mass intensity, deformation characteristics and instability failure in the rock engineering to a great extent. Using the similar material simulation is of different inclination angle of non-penetration jointing and non-jointing rock mass, through using rigid servo compression machine to carry uniaxial compression test, we get a nearly same trend of joint rock mass stress-strain curve of different angle, the curve of inclination angle of 45 is analyzed, the test result shows that the compressive strength first decreases and then increases gradually with the increase of rock inclination angle. The compression intensity is its minimum when of the inclination angle of 45°, and the deformation modulus first decreases and then increases, but deformation modulus of 30° is its minimum. In addition, through the use of developed RFPA2D system to simulate on trial uniaxial compression value based on microscopic damage mechanics, we get the conclusion that the numerical analysis and test result is fitting approximately, it is validated that the numerical model can simulate joint rock well. Keywords: joint rock mass, inclination angle, uniaxial compression, compressive intensity, deformation modulus
Research on W-Mo-Y Multi-Elements Co-Diffusion Treatment and Plasma Nitriding
Authors: Gao Yuan , Wang Cheng Lei , Li Bing , Chen Xuan Nan
Published: December 2011

Using plasma alloying technique, Q235 steel was firstly treated by W-Mo-Y Multi-elements co-diffusion followed by plasma nitriding process. And then the wear tests were conducted. The effects of technological parameters on alloying layer were studied. The structure, composition, phase and micro-hardness of alloying layer were analyzed by metalloscope, XRD, SEM and microhardness tester. Results show that the microstructure of W-Mo-Y Co-diffusion layer is columnar crystal; W, Mo contents decrease from the outside to the inside. The element Y is distributed mainly at the grain boundaries. The phase of alloying layer consisted of Fe, Fe3Mo, Fe17Y2and the solid solution of (W, Mo, Y) in α-Fe. After plasma nitriding process, the co-diffusion layer is strengthened and large amount of nitrides form and dispersedly distribute in the alloying layer. After nitriding the phase of alloying layer consist of Fe4N, Fe3Mo, Fe, MoN, Mo2N, W2N, WN. the average micro-hardness is 850HV0.05.Compared with untreated samples, the wear resistance of alloying layer is improved by 2 times under abrasive wear conditions.
Effects of Shielding Gas and Magnetic Field on Characteristics of AZ31 Magnesium Alloy by TIG Welding
Authors: Chen Yong , Sui Fang Fei , Cong Kang Li , Yan Xin Qi , Zhang Guan Yu , Guan Shao Kang
Published: December 2011

The effects of shielding gas and external longitudinal magnetic field on arc shape and weld quality of AZ31+1%Ce+1%Sb magnesium alloy TIG welding were investigated. The results show that a weld joint with a good appearance, few defects and enough penetration can be obtained under the protection of helium-argon gas mixture, especially when the helium ratio is about 50%. However, the weld quality is significantly decreased by adding additional CO2or N2in He-Ar gas mixture. The weld seam consisted of fine equiaxed grains which mostly grow in a certain direction were formed when a longitudinal magnetic field is added, due to its electromagnetic stirring in weld pool. The grains of weld seam formed under the alternating current longitudinal magnetic field are much finer than those under the direct current magnetic field. A weld joint with good formability and finer microstructure is obtained when the exciting voltage of AC longitudinal magnetic field is 20 V. The average microhardness of the corresponding weld joint is 68.5 HV0.1, and its average tensile strength is 220 MPa which is up to 88% of that of the base plate.