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Structural Innovation Design of the Compressor Impeller

Xiaomei You, Lei Meng, Bangchun Wen
For the main problems in practical applications of the impeller (key part of the large-scale centrifugal compressor), based on the product integrated design theory, the design quality model of the impeller overall considered its structural performance and manufacturing performance is built, and the viewable...

Friction Analysis for Piston Ring of Seal Device in the Stirling Engine

Shunqiang Hou, Lili Zhang, Xiaoyan Zhang
The friction pair of piston ring-cylinder liner for the piston ring seal device of Stirling Engine is plastic-metal friction pair, its working conditions for dry friction. So the wear resistance of the piston ring is poor, its service life is short. This paper regard integral non-backpressure piston...

Study on the Virtual Test for Reliability for Contact Stress of Gear Tooth Face

Yanyan Shi, Haochuan Li, Ge Zang, Shuangfeng Wu, Shi Ji
Based on the technology of virtual test for reliability for the study of small sample sizes by using Box-Behnken sampling method and FEA method, the paper presents a method for studying the randomness of tooth face contact stress by using technology of virtual test for reliability. According to that...

Research on the Preparation of the Environmental Friendly Pillared Bentonite and Its Catalytic Properties

Xuan Zhang, Qian Wang, Honglei Jiang
An investigate was carried out to evaluate the catalytic performance of a Fe, Al-pillared bentonite for heterogeneous photo-Fenton systems. The catalyst was prepared by a cation doping technique and X-ray diffiraction and infraed spectroscopy were used to characterize its properties. The results showed...

The application of multiobjective programming with regard to the problem of bandwidth distribution

Baoji Xu, Zhihong Sun, Gang Liu, Guikao Yang
The application of multiobjective programming with regard to the problem of bandwidth distribution is very important. For the remote places, the uneven-distribution and the fluidity of users will not lead to regional dense population. Therefore, the large-scale repeaters with wide radiation range will...

Research on Quantitative Model of Risk Assessment for Amusement Rides

Yuan Xiao, Jianping Ye, Ruomeng Chen, Minglang Tang
According to the features of amusement rides and the definition, the quantitative model of risk assessment for amusement rides was build based on hazard probability and hazardous consequence calculated with economical loss. According to the structure features that the amusement rides are composed with...

Application of Neural Network in the Evaluation of Equipment Maintenance Quality

Meng Zhang, Peng-fei Xu, Jun-bang Liu, Wei Jiang, Shuai Wang
Using neural network BP algorithm and the neural network toolbox of MATLAB, this paper presents a new the evaluation model of equipment maintenance quality and uses an example to validate the evaluation model of equipment maintenance quality. At last it is proved that the effect of the model is perfect.

Analysis of contact stress of Hypoid Gear of micro- car rear axle

Jinli Xu, Shangguo Wan, Bing Xia
Established a finite element model of hypoid gear of a micro-car rear final drive, analysis of the hypoid gear mode and static contact by means of finite element analysis , obtained the surface of gear contact stress distribution in the different installation position,The results show that the finite...

Overall design of Electronic Cam System based on SCM89C52

Wei He, Cheng Wang
Aiming at the limitation of cam mechanism, on the basis of analyzing research actuality of electronic cam at home and abroad, electronic cam system of single-chip microcomputer(89C52)controlling stepping motor is adopted to implement straight reciprocating movement of cam mechanism follower. Furthermore,...

The offshore spill oil recovery monitoring system based on the wireless communication

Wen Dai, XuYing Ren, Qian Li
This paper adopted the dynamic inclined plan (DIP) oil skimmer. The monitoring system composed of oil skimmer and workstation. The workstation on the vessel monitored the oil sump tank’s oil level in real-time. And the MCU,controlled the oil pump to suck spilled oil. In the system’s design, data transmission...

The forming technology and use of titanium alloy elbow made by diameter-expanding and pushing

JUN CHEN, WENSEN DUAN, HAIYING YANG
Titanium alloy has good corrosion resistance so it has been used as pipeline for delivering corrosion media. The forming technologies of titanium alloy have many types, such as elbow made by diameter-expanding and pushing, elbow made by pressing plate and welding, elbow made by die pressing with mould,...

Distribution and Optical Properties of the Pulsed Plasma Thruster Plume Deposition

Rui Zhang, Daixian Zhang, Yong Li, Fan Zhang, Jianjun Wu
In order to study the characteristics of Pulsed Plasma Thruster plume contamination, the distribution and optical properties of the films deposited by Pulsed Plasma Thruster were studied. The morphology of the deposited film was analyzed by scanning electron microscopy and scanning probe microscope,...

Injection Mold Cavity Stiffness and Intensity Analysis Based on ANSYS Workbench and MOLDFLOW

Tie GENG, Wei-qing TU, Dan-dan LIU
The loading conditions of cavity is determined through using CAE software MOLDFLOW to simulate plastic flow injection molding process of the plastic product and as the force for the input load of the plastic products injection mold cavity strength analysis. Study on finite element simulation of stress...

The Numerical Simulation for Heat-transfer process of Photovoltaic Rolled Glass in Forming Stage

Tie GENG, Dan-dan LIU, Wei-qing TU
The calculation model on analysis convective heat transfer established is according to the structural features of photovoltaic rolling glass in its forming stage. The computational fluid dynamics (CFD) software FLUENT was used for numerical simulation of flow field, The study analysis the temperature...

Comprehensive Evaluation of Air Conditioning Cold/Heat Source System Based on Fuzzy Mathematics Theory

Gang Chen, Jiping Xie, Huimin Li, Xin Cheng
This article use fuzzy comprehensive evaluation to quantitative analysis each factor which effect the selection of air conditioning cold/heat source systems. Meanwhile, offer a reasonable and feasible method to air conditioning cold/heat source system selection through a concrete example.

Comprehensive Evaluation and Analysis of Urban Rail Transit Network Plan Based on DEA Method

Yu-zhao ZHANG, Jian-qiang WANG
The evaluation of urban rail transit plan network is the key link of rail transit plan, it is very important for determining optimal plans or satisfying plans which are advanced in technology, reasonable in economy, and feasible in implementation. Based on the analysis of present evaluation index systems...

Modularization of Feature Information for Marine Diesel Engine Parts

Hui ZHANG, Sheng-wen ZHANG, Pan ZHAO, Jian ZHANG
According to the modularization principle, focusing on the practical problem of NC tool path generation, feature information is processed with group technology for tooling in CAM (Computer Aided Manufacturing) of the key parts of marine diesel engine. The processing is mainly made on the basis of similarity...

Supply Chain Optimization of Assembly Manufacturer with Uncertainly Demand and Uncertainly Lead Time

De-zhi ZHANG, Shuangy-yan LI, Fang-ping JIN
Order strategy optimization of multiple suppliers assembly manufacturing supply chain system under the random demand and random lead time is investigated in this paper. Manufacturers order strategy is sought for in order to minimize supply chain joint cost. Quantity ratio of different components due...

The testing research on horizontal bearing capacity for the cast - in - place pile socketed in rock

Dong Wang, Yin Cheng
In order to study the characteristics of the lateral bearing capacity for the case-in-place pile socked in rock, a single pile lateral load test is conducted in site, in which, some instrument were installed in pile shaft, and the deflections in the pile top and the steel bar stresses were taken under...

Simulation Optimization of the Filling Process of Vacuum Infusion Molding Process for Composite Yacht Hull

Bo YANG, Tianguo JIN, Shenglong WANG
Vacuum infusion molding process(VIMP) is widely used for manufacturing the composite yacht hull, but the process parameters are designed by experience or lots of experiments. In this paper, the filling process of VIMP for composite yacht hull was deeply analyzed based on numerical simulation technology....

Optimization of poly-silicon deposition process for switch

Zhengyuan Zhang, Yang Cao, Yong Mei, Zhicheng Feng, Jiangen Li
Aiming at the severe effect of poly-silicon deposition process on the performance of polysilicon swtich, experiments were made on optimization of poly-silicon deposition and releasing the stress of polysilicon beams to obtain optimal process conditions. By using the optimizing process, the fabrication...

Investigation in Effect of Nano-WC powder on wear resistance of Fe/ WC coating

Hongjian Guo, Zhenyu Zhang, Bunv Liang, Jing Li, Xiaojun Lin
In view of the wear and corrosion damage of water turbine in the hydropower station the different content weight rations of nano-WC powders were added into traditional metal--ceramic coating materials Fe/ WC, the composite coatings were manufactured on the surface of 45# steel by the Subsonic flame spraying,...

Study on the performance of the new high-strength steel-encased Concrete composite beam (SCCB)

Qiyin Shi, Chao Liu, Lilin Cao, Zhen Wang
On the basis of the theoretical study and application of ordinary steel-encased concrete composite beam, this paper will focus on a new high-strength steel-encased concrete composite beam, and mainly studies high-performance steel Q420 and Q460, as well as high-strength concrete C60 and C80. Besides,...

Solute Analyse of Directional Solidification Microstructure in a Binary Alloy

Jinjun Tang, Mingan Zhou
In this paper, the directional solidification microstructure of Bridgman system was simulated using phase-field method, and different calculated results were obtained with four pulling velocities. Transverse solute shows “U” shape profiles. With the pulling velocity (vp) increasing, the span of “U” figures...

The B2C Based on JSP Electronic Mall of Designing and Realizing the System

Chunhua Tang, Jinjun Tang, Cui Liang
Electronic Commerce is in the Internet open network environment, based on the browser/server application methods to realize the online shopping, consumer entered into between online trading and on-line Electronic pay a new type of business operation mode. Traditional electronic commerce system structure...

Determining the Shortest Path of Multi-location Path Based on the Maximum Flow

Xueying Li, Qin Zhang, Qiang Zhang, Wenxia Yu, Mengzhu Shi
In this paper, multi-location path math model is established at the condition that the number of distribution centers, customers, and the service scope is known. Constraints are including customer demand, network matching, and vehicle loading. To solve the shortest path based on the maximum flow problem,...

Numerical Analysis of Influence of Large-Diameter EPB Shield Tunneling on Ground Deformation in Beijing Area

Tao Gong, Xiuren Yang, Chengzhi Qi, Deyun Ding
A large-diameter earth pressure balanced (EPB) shield has been firstly used in the Beijing metro line 14 in China. In this paper, to take the experimental project of the metro line 14 as an engineering background, the tunneling process of the EPB shield with an outer diameter of 10 m was simulated using...

Seismic Performance Analysis of Three-Arch Double-Deck Metro Station Based on Response Displacement Method

Deyun Ding, Weifeng Wang, Meiqun Huang, Xiuren Yang, Zongzhen Wu
Taken the Dawanglu station of Beijing metro line 14 as engineering background, the response displacement method is used to analyze the seismic performance of the three-arch double-deck metro station modeled by the two-dimensional finite element method. Numerical results show that the seismic calculation...

Calculation of slab-column middle connection under combined shear and unbalanced moment

Hua Li, Nan Guo, Yiying Lin
The purpose: The method to calculate slab-column middle connections under combined interaction of vertical shear and unbalanced moment is given to perfect the design method of slab-column structure, Method: The calculation method is proposed based on the calculation method of slab-column connection and...

The Research of Capacity Control Standard in Bridge Transition Section Subgrade Based on Measured Dynamic Stress

Xiushao Zhao, Linli Mo, Wei Liu, Chenggang Ai
The dynamic stress in existing bridge transition section of often bigger than ordinary roadbed due to its stiffness irregularity, so using the ordinary subgrade bearing standard as bridge transition section standard is inappropriate. Based on the measured dynamic stress in Xin-feng river bridge transition...

Finite Element Simulative Analysis of Concrete Arch Dam Structure

Dongyu Ji, Weixing Chen
In this paper, finite element simulative analysis is proceeded for the concrete arch dam of Tianshengqiao reservoir. Deducing variation law of the dam’s stress and displacement in construction process and operational process. The analytic results are shown concrete arch dam of Tianshengqiao reservoir...

Hybrid genetic algorithm-based on optimization of multi-echelon inventory structure design

Yang Yu, Zhangen Wang, Qiang Zhang, Wei Yang, Mengzhu Shi
Take inventory and delivery time of raw materials and finished products in the product life cycle from upstream business to the downstream business as the main variable,Integrated cost factors of multiple suppliers, individual manufacturers, multiple distribution center and multiple retailers under the...

Analyzing the Diaolou's Construction and Eco-design of Qiang Minority

Hong Zhang, Xiao Hong Wang
Taking the Heihu Diaolou of the Qiang Minority in the upper reaches of Mingjiang River as an example, the author analyzes the distributing, construction, functions, sorts and scales of the Qiang Diaolou, trying to reveal us the special housing eco-design feature consisted in the Diaolou.

WATER LEAKAGE CLASSIFICATION OF EXPRESSWAY OPERATIONA TUNNEL BASED ON BP NEURAL NETWORK

Yulin ZOU, Chuan HE, Yi ZHOU, Chaofan YAO, Zheng ZHANG
In this paper, factors influencing the tunnel leakage are analyzed synthetically, based on present situations of water leakage of operational highway tunnel in Chongqing area. Standard of tunnel leakage grade is determined and index system of tunnel leakage model is established by choosing physical geography,...

The Effective Length of Elastic Supporting Bars

Shi-lun SHI, Chun-lan Liao
Elastic supporting bars exist in many structures, like transmission tower, truss, even frame, etc. Take transmission tower for example, the load-carrying capacity of diagonal members often controls the structure’s bearing capacity. Previous experiments and engineering experiences indicated that possible...

Study on Vibration Bounce Area Caused by Metro -Based on the Pulse Impact Experiment

Wenbin WANG, Weining LIU, Ning SUN, Meng MA
At present, there is no systematic research on the ground surface vibration bounce area induced by metro. The experiments of vibration attenuated on the ground surface were carried out in an underground laboratory at Beijing Jiaotong University to obtain the ground surface attenuation characteristics...

FIELD IN-SITU OBSERVATION ON ROAD-EMBANKMENT INTEGRATING SOFT SOIL ROADBED

Yulin ZOU, Zhichao DONG, Chuan HE, Chaofan YAO
In the engineering background of a new road-embankment integrating Binjiang Avenue in a city adjacent The Yangtze River, soft soil Roadbed is treated by drainage consolidation method. In-situ observation on test section, which including settlement plate to monitor vertical settlement and inclinometer...

Force Analysis of Reinforced Concrete Rectangular-sectioned Beam-supported Aqueduct

Dongyu Ji, Xidong Zhang
This paper adopts finite element method to carry out simulation analysis for Baochuan reinforced concrete rectangular-sectioned beam-supported aqueduct. Deducing variation law of the aqueduct’s stress and displacement in construction process and operational process. Analysis results show that, Baochuan...

The characteristics and statistical parameters of the exhibition building fire load

Jinping Wang
Carried out fire load survey of exhibition building in Beijing, and obtained a lot of data. On preliminary theoretical studies results the data has been analyzed, and then determined the fire load density standard value 876.21MJ/m2, average of 382.97 MJ/m2. The data is not refused to obey the extreme...

Fuzzy multi-objective optimization design of fuel injector pump plunger spring

Erzhong An, Yunchao Wang
Fuzzy theory and multi-objective optimization technology were applied to design fuel injector pump plunger spring based on consideration on its force condition. The mathematical model for the multi-objective optimization design was built under the objective of the maximal fatigue safety coefficient,...

The Strength Analysis of the Diagonal Stay of Aircraft Landing Gear Based on ANSYS

Ying XING
As the landing gear structure is complicated, it is difficult to draw accurate stress and strain distribution through the theoretical calculation. This paper carries on modeling and force analysis to the buffer mechanism of aircraft landing gear, transforms the stress problem dynamic system into static...

Research on Intelligent Precise Pass Algorithm Based on Linked List Model

Guochang Li
With higher project demand for cold bending forming steel function, the geometry section of profiles is becoming more and more complicated, and pass design of rolling section steel is becoming more and more difficult. The design method based on experience and estimating doesn’t meet the engineering requirements....

Three-dimensional Finite Element Simulation Analysis of Bridge-type Inverted Siphon Structure

Dongyu Ji
This paper adopts general finite element software to analyse Lingyun bridge-type inverted siphon structure, researching variation law of the inverted siphon’s stress and displacement in construction process and operational process. Research results further verified rationality and security of the design...

Mechanism and Design of Hanging Assembled Supporting Structure in the Roadway

Xiantang Zhang, Yi Bai, Hongmin Zhou, Hongli Wang
The effect of the roadway supporting not only depends on the supporting force itself, but also depends on the surrounding rock, quantity of supporting placement, time and quality of setting up, and contacting points and surface in the surrounding rock. The classification, nature and failure mechanism...

Strength and Shrinkage Property of Nano Silica Powder Concrete

Hongxia Yang
Through indoor test to explore the compressive strength,bending tensile strength and shrinkage property of nano silica powder cement concrete. The test results show that in ordinary cement concrete mixed with an appropriate amount of nano silica powder, and bending tensile strength has increased, but...

Simulation Analysis for Bitumen Residuum Concrete Core Wall Rockfill Dam of White River Hydropower Station

Dongyu Ji
Through analyzing bitumen residuum concrete core wall rockfill dam structure’s mechanical characteristics in construction process and operational process, this paper adopts finite element method to carry out simulation analysis for bitumen residuum concrete core wall rockfill dam of White River hydropower...

Study on countermeasures of the maintenance spares storage based on AHP

Y.J. Shao, C.M. Ma, H.X. Pan, Y.J. Liu
Spare parts management is an important part of the maintenance activities and the spare parts are the basic guarantee of maintenance. Classified Management of spare parts is an important issue in the management of spare parts. Only classifying the spare parts scientifically that the maintenance tasks...

Research on application of Compactly Supported Biorthogonal wavelet in image Matching

Zhou Fang, Yan Cao, Li-Na Zhang
Image matching solves the identification of identical regions between images in a moving image sequence that is collected by a CCD camera. Through image feature region matching, micro-displacement and micro-angular displacement can be measured based on digital image processing. In the paper, a shape...

Experimental Study on Mechanical Property of Soil-Cement

Hongxia Yang
Based on test data analysis of soft foundation reinforcement of Ji-He expressway in Shandong province, this paper discussed mechanical properties of soil-cement and variation law.The results showed that the main factors which effect the compressive strength of soil-cement include cement content,age and...

The Research on Seismic Response of Prestressed Concrete Flat Beam in Pseudo-dynamic Test

Feiyan Li
By carrying out pseudo-dynamic test on an unbonded and a bonded prestressed concrete flat beam separately, their dynamic properties and seismic responses can be learned, also seismic resistance can be compared. The test results show that framework with prestressed concrete flat beam has certain energy-absorbing...