基于系统约束的重型汽车动力学建模及分析

摘要/Abstract

摘要： 针对传统方法建立汽车整车动力学模型中存在的过程复杂、约束难以确定等问题，以重型汽车整车为对象，应用Udwadia-Kalaba理论提出了一种基于系统约束的离散化模型，并进行了动力学分析。该模型考虑了汽车在正常行驶过程中路面对4个轮胎的真实激励情况，重点研究了整车z向的动态特性。通过MATLAB仿真得到空载和D级路面激励情况下的振动特性，并将该模型与传统方法建立的模型进行比较，验证了模型的正确性，同时分析了车身关键位置及驾驶员位置动态特性曲线。

关键词: 重型汽车, 系统约束, 离散化动力学系统, Udwadia-Kalaba理论, 动力学分析

Abstract: Aiming at difficulties of building vehicle model, a discrete dynamics model of heavy-duty truck was proposed based on system constraints, and dynamics analyses were made based on the model. Basic theory of the model was from Udwadia and Kalaba's multi-body dynamics system. The situations that four tires' loads generated by road were different during normal operations considered. The dynamics characteristics of z direction of the vehicle were mainly researched . Though simulations by MATLAB, the graphs of each particles under conditions of unload and load beyond level D were obtained. Compared with the graphs which was generated by Lagrange model, the correctness of the dynamics model was proved, and the simulation graphs of dynamic characteristics of key particles and the driver were analyzed.

Key words: heavy-duty truck, system constraint, discrete dynamics system, Udwadia and Kalaba theory, dynamics analysis

中图分类号:

U461.1

黄康, 段松林, 甄圣超, 徐锐, 薛永昌. 基于系统约束的重型汽车动力学建模及分析[J]. 中国机械工程.

HUANG Kang, DUAN Songlin, ZHEN Shengchao, XU Rui, XUE Yongchang. Modeling and Analyses of Heavy-duty Truck Dynamics Based on System Constraints[J]. China Mechanical Engineering.

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