摘要：
道路交通事故发生的时间短暂、原因复杂,使得人们难以掌握交通事故发生过程的破坏形式以及减少事故损失的方法.为了形象地模拟道路交通碰撞事故过程,清晰地展现破坏形式和碰撞能量,基于Quest3D虚拟现实平台,运用PhysX物理高阶引擎技术,针对交通事故中常见的两车碰撞开发了汽车碰撞仿真系统.结果表明,通过碰撞方式控制、相关参数控制、制动控制等多功能仿真控制,实现了白天、晚上、雨天、雪天等全天候下弹塑性三维碰撞模拟;渲染汽车碰撞过程中车身的凹陷、撕裂等破坏效果的同时,实现了实时输出碰撞速度、速度、动能、坐标向量、制动距离、角速度、角动量等定量化数据,为汽车碰撞事故的分析与重现提供了有利的仿真工具.%Traffic accidents happened in short time with complex reasons , it is difficult make to grasp the forms of traffic accidents damage and the methods to reduce accident losses .In order to visualize the process of traffic ac-cidents and show the damage mode and collision energy clearly , a car crash simulation system aimed at common crash between two cars in traffic accidents was developed based on Quest 3 D virtual reality platform using the tech-nology of PhysX physics engine .The results show that elastic-plastic crash simulation is achieved under different weather such as daytime , night, rain and snow, etc.with multifunctional simulation controls with type of collision , relevant parameters and braking control , etc.While the effect such as sagging and tearing of car crash is rendered , the quantitative data of collision speed , velocity, kinetic energy, coordinate vector, braking distance, angular ve-locity and angular momentum can be output in real time , which provides a favorable simulation tool for the analysis and reappearance of vehicle collision accidents .
