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Study on Strength Analysis and Optimization of Minivan-Body Structure Shanghai Jiao Tong University

Author: ZhaoZuoZuo
Tutor: WangJunJie
School: Shanghai Jiaotong University
Course: Mechanical Engineering
Keywords: Minivan Strength analysis Structural optimization Finite Element Analysis
CLC: U463.82
Type: Master's thesis
Year: 2011
Downloads: 147
Quote: 0
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Abstract


Vigorously develop the rural areas and the people of the road to riches in China is more and more widely, the minivan as production has entered a more and more families. Mini trucks often arbitrary user overload use, poor working conditions, coupled with higher its targeted customer base taking into account the requirements of the economy, the minivan is necessary to ensure the quality and not too expensive, which make it The design is particularly important. The minivan strength properties of the body-in-white structure is an important basis for the evaluation design is reasonable. Currently in the design stage of the car, the use of computer simulation technology to predict the various properties of the car has become the consensus of the major vehicle manufacturers to find design flaws. In this paper, the parts of the minivan analysis more simplify more and less use of the vehicle analysis, finite element analysis technology, multi-body dynamics simulation, and experimental methods load spectrum measurements combine a minivan The body structure analysis of the strength properties of the body In order to better understand the body structure and seek to optimize the direction, before the strength analysis, modal and stiffness analysis. The main content of this paper are: the: reference and study more mature body modeling must simplify means to take full advantage of the powerful features, the use of the finite element mesh automatically by the module modeling to quickly establish the finite element model of the body-in-white minivan . Modal stiffness analysis and finite element model, results analysis shows that the modal frequency of the body-in-white lower stiffness. Static strength analysis: In this paper, the the inertia release of five extreme working conditions, in order to take full account of the end plate on road force passed to the influence of the body-in-white and white body as a flexible body load distribution, the vehicle rigid-flexible coupling model, Msc.Adams environment to obtain the peak force and moment of the body mounting point of the five extreme working conditions, in the input Msc.Nastran, calculate the stress contours obtained limit conditions BIW analysis found the presence of stress values ??higher risk areas. The: user pavement acquisition actual road load spectrum, combined with the stress distribution under the body-in-white unit loads and body material properties, local strain fatigue strength analysis, life prediction nephogram through contrast with the actual cracking phenomenon known simulation analysis accuracy. : The site does not meet the requirements for each life, on the basis of the above simulation analysis, a specific structure analysis by means of finite element analysis and optimization. Before and after using the finite element analysis to optimize contrast, the The contrast results demonstrate the effectiveness of the optimization program. With the help of the finite element analysis tools to study the structure of the body of a minivan, identify the area of ??structural strength and corresponding optimization scheme to resolve it, and verified by comparison with the actual state of the reasonableness of the analysis. In this paper, the analysis process and analyze the data to get an important reference value in the same car, with a strong practical.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Cab and body > Car body
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