a00电动轿车车头3d设计及碰撞分析学位论文.doc

本科生毕业设计（论文）  PAGE 73 摘要 随着汽车保有量的增长，道路交通事故己经成为世界性的一大社会难题。每年有大量的人因交通事故死亡，交通事故带来的损失日益剧增，研究汽车的碰撞安全性能，提高其耐撞性成为各国汽车行业研究的重要课题。 本文为了改进某一整车的前碰撞性能，应用计算机仿真技术对该车的前碰吸能部件进行了碰撞仿真改进研究。设计车头3D数模，并根据其各吸能区计算断面结构，由改进前的整车有限元模型碰撞仿真计算结果与改进后的实车碰撞试验结果的对比表明，部件的碰撞仿真设计是确保设计车辆具有良好碰撞性能的一种重要的方法和手段。 关键词：车头模型、断面结构、计算机仿真 Abstract With the increasing of car amount, traffic accident has become a serious problem in the world. Many people annually died in the traffic accident，traffic accident gives the life and property safety of people bring serious of disaster. But now because the loss of accident increase greatly，the study of car crash safety performance attracts the increasing attention of a consequence of car company in the whole world. In order to improve a passenger cars crashworthiness, a computer simulation was done in this paper to study the crash characteristics of the energy absorbing front end of a car .3D digital-analog design front, and areas according to their calculation of the absorption cross section structure .The results showed that the method of the crash simulation was a feasible way to ensure a new designed car having good crash worthiness. Key words: Digital-analog front、Cross section structure、Computer Simulation 目录  TOC \o 1-3 \h \z \u  HYPERLINK \l _Toc296270071 第一章 绪论  PAGEREF _Toc296270071 \h 5  HYPERLINK \l _Toc296270072 1.1. 课题背景  PAGEREF _Toc296270072 \h 5  HYPERLINK \l _Toc296270073 1.2. 研究的目的和意义  PAGEREF _Toc296270073 \h 6  HYPERLINK \l _Toc296270074 1.3. 汽车碰撞法规的现状及发展趋势  PAGEREF _Toc296270074 \h 6  HYPERLINK \l _Toc296270075 1.4. 研究内容  PAGEREF _Toc296270075 \h 7  HYPERLINK \l _Toc296270076 第二章 汽车车头3D数模  PAGEREF _Toc296270076 \h 9  HYPERLINK \l _Toc296270077 2.1 CATIA软件应用介绍  PAGEREF _Toc296270077 \h 9  HYPERLINK \l _Toc296270078 2.2 车头3D数模  PAGEREF _Toc296270078 \h 10  HYPERLINK \l _Toc296270079 第三章 碰撞过程中各吸能区的划分及作用  PAGEREF _Toc296270079 \h 11  HYPERLINK \l _Toc296270080 3.1 车身的概述  PAGEREF _Toc296270080 \h