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Modeling and simulation of flexible frames for proper modeling of heavy truck dynamics.

机译：柔性框架的建模和仿真，用于重型卡车动力学的正确建模。

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摘要

The goal of the proposed research is to determine the range of validity of rigid body models of trucks depending on the severity of road inputs, and the mass and location of the payload. A "half car" model of a Class VI truck was constructed using the bond graph modeling representation, for which power flow among elements has been employed to determine whether or not frame flexibility affects vehicle motion, or can be neglected. Bond graph based proper modeling and partitioning methods were used to systematically and quantitatively determine whether or not frame flexibility effects were negligible. A proposed algorithm based on Design of Experiments and response surface analysis showed promise in more efficiently searching the design space to generate the range of parameters with fewer simulation runs than were required with a "brute force" method. The feasibility of the power-based partitioning method and response surface algorithm were demonstrated with a simple free-free beam case study.;Flexible frame modal parameters were calculated from theory, and with a finite clement model, for inclusion in half-car (pitch plane) bond graph models. Application of the partitioning algorithm to a nonlinear half-car model with vertical and longitudinal dynamics resulted in a range of payloads and road roughness for which a rigid model may be assumed valid. The metric for assessing suitability of a rigid model, which was called "relative activity", was correlated with accuracy of a rigid model. Rigid models within the range of validity performed well. The results of this thesis support the use of energy-based partitioning to automate the reduction of truck models. Unnecessary complexity can be avoided while predictive ability is maintained, with less reliance on intuition and assumption.
机译：拟议研究的目的是根据道路输入的严重程度以及有效载荷的质量和位置来确定卡车刚体模型的有效性范围。使用绑定图模型表示法构建了VI类卡车的“半车”模型，为此，采用了元件之间的功率流来确定车架柔韧性是否会影响车辆运动，或者可以忽略不计。使用基于键图的适当建模和分区方法来系统地和定量地确定框架柔韧性效果是否可以忽略。基于“实验设计”和“响应面分析”的拟议算法显示出有望以比“强力”方法更少的模拟运行更有效地搜索设计空间以生成参数范围的希望。通过简单的自由梁案例研究证明了基于功率的划分方法和响应面算法的可行性。;从理论上计算了柔性框架模态参数，并使用有限元模型将其包括在半车厢（俯仰角）中平面）键图模型。将划分算法应用于具有垂直和纵向动力学的非线性半车模型会导致一定范围的有效载荷和路面不平整，对于这些范围，刚性模型可以被认为是有效的。评估刚性模型适用性的度量标准称为“相对活动”，与刚性模型的准确性相关。有效性范围内的刚性模型表现良好。本文的结果支持使用基于能量的分区来自动减少卡车模型。在保持预测能力的同时，可以避免不必要的复杂性，从而减少对直觉和假设的依赖。

著录项

  • 作者

    Khan, M. Tanveer Rahman.;

  • 作者单位

    Memorial University of Newfoundland (Canada).;

  • 授予单位 Memorial University of Newfoundland (Canada).;
  • 学科 Engineering Automotive.
  • 学位 M.Eng.
  • 年度 2009
  • 页码 139 p.
  • 总页数 139
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 普通生物学;
  • 关键词

  • 入库时间 2022-08-17 11:38:19

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