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Boundary condition handling approaches for the model reduction of a vehicle frame

机译：车架模型简化的边界条件处理方法

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摘要

In order to apply model reduction technique to improve the computational efficiency for the large-scale FEM model of a vehicle, this paper presents the handling approaches for three widely-used boundary conditions, namely fixed boundary condition (FBC), prescribed motion (PSM) and coupling (COUP), respectively. It is found that iterated improved reduction system (IIRS) reduction method tends to generate better reduction approximation. Guyan method is not sensitive to the sequence of reduction and constraint under FBC, and can thus provide flexibility in handling different boundary conditions for the same system. As for PSM, 'constraint first' is recommended no matter which reduction method is used, and then separate reduction models can be coupled to form a new model with relative small dofs. By selecting appropriate master dofs for model reduction, the coupled model based on reduced models could produce same results as the original full one.
机译：为了应用模型约简技术来提高车辆大型有限元模型的计算效率，本文提出了三种广泛使用的边界条件的处理方法，即固定边界条件（FBC），规定运动（PSM）和耦合（COUP）。发现迭代改进的还原系统（IIRS）还原方法趋于生成更好的还原近似值。 Guyan方法对FBC下的还原和约束序列不敏感，因此可以为处理同一系统的不同边界条件提供灵活性。对于PSM，无论使用哪种缩减方法，都建议“约束第一”，然后可以将单独的缩减模型耦合以形成具有相对较小自由度的新模型。通过选择适当的主自由度以进行模型简化，基于简化模型的耦合模型可以产生与原始完整模型相同的结果。

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  • 来源
    《Mechanical systems and signal processing》 |2016年第6期|123-137|共15页
  • 作者

    Qingxi Xie; Nong Zhang; Bangji Zhang; Jinchen Ji;

  • 作者单位

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China,DFCV Technical Center, Dongfeng Commercial Vehicle Company, Wuhan, China;

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China,Faculty of Engineering, University of Technology, Sydney, Australia;

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China;

    Faculty of Engineering, University of Technology, Sydney, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Model reduction; Vehicle vibration; Boundary condition; Coupling;

    机译：模型简化;车辆振动;边界条件;耦合;

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