Applied Mechanics and Materials Vol. 443

Abstract: With the rapid development of computer technology, the processing ability of image simulation system is becoming stronger and stronger. The widely used AutoCAD (Computer Aided Design technology) in automobile car body drawing gradually extends to automation direction,and it can be more widely used.Realizing the informationization deepening in automobile car body drawing has a very important significance for the modernization construction of our country.Based on the analysis of advantages and disadvantages of AutoCAD technology,this paper puts forwards the application of reliable transmission technology in automobile car body drawing operation,designs automation model of automobile car body drawing system and introduces the information feedback of transport layer in this mechanism,so as to achieve the optimization of highly efficient application in automobile car body drawing system.

Abstract: In this paper, a dual-scaled method is introduced to simulate the nonlinear property of porous honeycomb material. In microscopic scale, stochastic analysis upon a detailed representation of the hexagonal cells is applied. In macroscopic scale, coupled fluid-solid PDEs with a modified stochastic item are used to describe the rheology of non-Newtonian property of honeycomb. Semi-discrete finite element method (FEM) is applied to solve the PDEs. Comparison of stochastic dynamic system with definite dynamic system is introduced. Numerical Results of Euler explicit time scheme and Crank-Nicolson semi-implicit time scheme are presented.

Abstract: Software controlled measurement procedure, designed for testing of inverter integrated circuit voltage parameters, is presented in this paper. Described solution, performed on circuit HCF 4007 UB, is based on data acquisition PCI card NI 6713 and control programming application developed in LabVIEW 8.0 software environment, installed on standard. PC configuration. Designed solutions of virtual instruments performs measurements, chronological recording, graphical presentation and software analysis of measurement results regarding to input and output threshold voltage levels, from inverter transfer characteristic recorded for different circuit supply voltages. LabVIEW software support in the process of recording, measurement and software processing of the integrated circuit basic parameters, provides full software automation of these procedures.

Abstract: For the existing problems in the design of mechanical products, based on the theory of fuzzy mathematics, the paper constructs fuzzy comprehensive evaluation model to comprehensively evaluate the existing problems. Then, by the obtained results, the model has a high degree of subjectivity. So, the paper combines data envelopment analysis with fuzzy comprehensive evaluation model, and establishes evaluation model of fuzzy data envelopment analysis. Ultimately, the paper improves the reliable and scientific evaluation model.

Abstract: According to the product function of baby is too single, unable to achieve energy saving, time saving and other problems, this paper puts forward a design of multifunctional portable baby bed. The utility model has the advantages of realize the conversion of baby bed and chair, folding, easy to carry, and has the advantages of simple structure, convenient processing, stable and safe, affordable.

Abstract: At present ballastless track has been widely applied to railway line for passenger in our country, therefore it has broad prospect. Cracks in ballastless track slabs are inevitable in the construction and operation of high-speed railway. Based on comprehensive investigation of documents, and taking cracks in ballastless track slabs as the main object, systematic and deep research has been done within this paper. The main research contents are as follows: First of all, the structure characteristics of CRTSIII ballastless track in high-speed railway are briefly introduced; Secondly, the paper mostly introduces the impacts what cracks make, the characteristics of cracks and how they form. Subsequently the paper introduces what are made to prevent cracks.

Abstract: In this article, unstable factor analysis is done in Wire cut electric discharge machine with high speed (WEDM HS), which focus on effect of processing Stability from electrical processing parameters, machine parameters, electrode wire, cutting fluid and conductive block, and how to adjust and excluding factors in order to enhance WEDM processing stability ,ensure machine parts surface quality, dimensional accuracy and processing efficiency.

Abstract: In recent years, with the enhancement of overall national strength in China, the computer simulation technology has been developed rapidly and widely applied to engineering construction. Particularly, investment proportion of the technology in deep foundation pit engineering is immense. Yet affected by national conditions in China, the construction and application of deep foundation pit engineering have many extensive factors. It also results in insufficient vigor of finite element analysis of deep foundation pit support construction. In this way, construction problems arise frequently under the condition that there exist buildings around. With some deep foundation pit support engineering, the thesis conducts simulation analysis of the engineering through the technology of nonlinear three-dimensional finite element.Project profile

Abstract: A description of the Railway Large Maintenance Machinery (hereinafter referred to the "RMM") failure is presented and the basic principle of the rough sets and attributes reduction is analyzed. The long-distance clustering method is used to transform continuous attributes values to discrete attributes values. The constructor method of distinguish matrix, and the case study of the RMM diesel engine failure detection attributes reduction is given. Distinguish matrix is constructed to achieve attributes reduction, failure diagnosis based on rough set is completed successfully.

Abstract: A speed-railway double-track tunnel 1# slant hole L7 slices are extremely rich water,the weathering depth to surface 270m, layer thickness of about 25m, the main filling material for decomposed granite clip diabase, diorite, sand-like and earthy.When tunnel excavation,extremely vulnerable and water burst mud.Using pipe roof curtain grouting method reinforcement after, The entire decency granite and the diorite-porphyrite obtain reinforce effectively push densely, drills takes in the core type to have the massive cement blocks, shuts off the water the function to be good, had guaranteed effectively excavates the section the construction progress.This article used the three dimensional finite element method to construct various stages to this tunnel through the L7 slices region pipe roof grouting method to conduct the analysis research, According to the analysis results timely and reasonable arrangements for excavation footage, research results can provide a reference for similar projects.