论文总字数：23443字

摘 要

ABSTRACT I

第一章·绪论 1

1.1 研究的意义 1

1.2 国内国外研究现状概述 2

1.3 主要研究内容 3

1.3.1 乘用车设计与多刚体模型概述 3

1.3.2 车辆制动稳定性概述 3

第二章·车辆多体模型建模及动态仿真技术概述 4

2.1多体系统动力学在车辆领域的应用基础探讨 4

2.2 多体整车动力学建模 5

2.3 动态仿真理论基础 6

2.4车辆动力学仿真研究软件 6

2.4.1 坐标系统 7

2.4.2 WM软件虚拟环境下物体（刚体）之间的约束组成 8

2.4.3 刚体之间的力元素传递 9

2.4.4动力学仿真控制命令 9

2.5 几何模型基础探讨 9

2.5.1 可变形物体几何模基础探讨 9

2.6动力学模型在WM软件虚拟环境下的建立 10

2.6.1物体（刚体）动力学模型在WM软件虚拟环境下的建立 10

2.6.2 拉压变形体动力学模型在WM软件虚拟环境下的建立 11

2.6.3 弯扭变形体动力学模型在WM软件虚拟环境下的建立 12

第三章·多刚体几何摸型与动力学模型建模及仿真基础 12

3.1 车辆基本参数 13

3.1.1 车辆力学参数 13

3.1.2 车辆发动机参数 14

3.1.3 车辆几何参数 14

3.2 车辆几何模型建模 15

3.2.1 运用建模软件概述 15

3.2.2 车体几何模型建模 16

3.2.3 车轮车轴几何建模 20

3.2.4 整车模型 22

3.3 车轮建模的动态力学分析探讨 23

3.4 动态力学探讨车轮模型物理参数 26

3.5 多刚体动力学车辆模型建模 27

第四章·路面模型建模 31

4.1 刚性半刚性与柔性路面 32

4.2 数字地面模型 32

4.3 变形路面模型 33

第五章·车辆制动稳定性虚拟分析 34

5.1 车辆制动性能概述 34

5.2 经济制动情况下动力学虚拟分析 34

5.2.1 虚拟分析/工况Ⅰ 35

5.2.2 虚拟分析/工况Ⅱ 37

5.2.3 虚拟分析/工况Ⅲ 39

5.3 本章小结 40

全文总结 41

致谢 41

参考文献 42

摘要

汽车是作为交通工具生产的，但汽车的发展不能被理解为一种非常流行的方式，此时，多刚体系统的动力学已经成为运动学分析和动态分析各种复杂体系的多种系统的有力工具。多刚性乘用车模型已经建立，乘用车的条件具有隐含的驾驶性能。汽车制动系统是基本系统和整体车辆安全系统，无论是国际还是国内，它都对制动系统有强制性的监管要求。此外，用户对驾驶性能的要求也越来越高，这是一种制动踏板的感觉，所以不同的原始设备制造商对制动踏板进行了更多的研究，这是当前汽车设计师为优化制动系统设计做好准备的主要目。

制动稳定性是指车辆在制动过程中保持直接行驶或沿预定曲线运动的能力，车辆的制动稳定性包括制动性能稳定性和制动方向稳定性，自汽车诞生以来，车辆制动系统在车辆安全性方面发挥着重要作用。

本文主要将涉及车辆动力学仿真、通过专业的建模软件实现车辆几何模型建模以及车辆多刚体力学模型建模、路面模型的分析概述与建立、车辆制动虚拟分析等内容，后通过对制动时车轮的受力分析、地面制动力、制动力矩等力的分析，探讨车辆制动稳定性的相关因素。

关键词：车辆制动 多刚体建模 虚拟分析

ABSTRACT

The automobile is produced as a means of transportation, but the development of the car has not been able to understand it as a purely popular means. Today, the system dynamics of multi-rigid bodies has become a powerful tool for kinematics analysis and dynamic analysis of various complex multi-body systems. The multi-rigid model of passenger cars is established, and the conditions for the passenger vehicles to have implied driving performance are obtained. The automobile brake system is an important system and safety system of the whole vehicle. Whether it is international or domestic, it has relevant mandatory regulatory requirements for the brake system. In addition, the user has increasingly higher requirements for driving performance. It is the feeling of a brake pedal, so more and more researches on the sense of brake pedal have been made by various OEMs. It is the primary purpose of current automotive designers to do a good job of optimizing the design of automotive brake systems.

Braking stability refers to the ability of a vehicle to maintain straight-line driving during braking or to travel along a predetermined curve. The vehicle brake stability includes the stability of the braking performance and the stability of the braking direction. Since the birth of the car. Vehicle braking systems play a crucial role in the safety of the vehicle.

This article will mainly involve the vehicle dynamics simulation, the use of professional modeling software to achieve vehicle geometry model modeling and vehicle rigid body model modeling, analysis and establishment of the road surface model analysis, vehicle braking virtual analysis and other content, after the system Analysis of the force of the wheel, ground braking force, braking torque, etc., and the related factors of vehicle braking stability.

Key Words: Vehicle braking; Multi-body modelling; Virtual Analysis

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