【作者】 张毅；

【导师】 成建联；

【作者基本信息】 长安大学 ， 机械工程（专业学位）， 2019， 硕士

【摘要】 本文以被动安全碰撞试验为基础,在深入了解滑台模拟试验方法和乘员约束系统评价方法的前提下,从碰撞安全法规、碰撞试验现状以及企业安全性能开发需求上出发,基于MADYMO软件建立部分车型驾乘人员约束系统模型,并在此模型上附加动态俯仰的条件进行动态响应,并进行实际工况的动态俯仰滑台模拟试验,结合动力学、影像学和多刚体原理的计算机模拟对试验进行分析,以此得出滑台动态俯仰对于假人伤害影响的结果。本文的主要内容有以下几个方面:1)介绍汽车安全碰撞试验的研究方法,理解常规的滑台模拟试验方法,掌握各国标准和法规对乘员保护的评价规则,了解假人结构和试验中的伤害指标。2)利用高速摄像追踪软件以及压阻式加速度传感器、角度和角速度传感器等采集部分代表车型的实车碰撞动态俯仰运动数据,以及假人各部位力、力矩、位移和加速度等数据,并建立数据库,对数据进行分析处理。3)以多刚体和有限元为基础,运用MADYMO软件,建立相对应车型的约束系统仿真模型,并对模型进行实车俯仰运动状态一致的模拟,得出假人伤害数据。4)以现有的滑台模拟试验设备建立近似的静态俯仰角度进行试验模拟,同时,制定对标试验大纲,设计试验方案,采用带俯仰功能滑台系统设备进行试验,采集相应车型的俯仰试验数据。5)对标实车试验结果、仿真结果、滑台模拟试验结果,分析动态俯仰对假人颈部伤害指标Nij(Neck Injury Criterion)伤害的影响结果。更多还原

【Abstract】 This article is on the basis of passive safety crash test,with in-depth understanding of the sled platform simulation test method and the evaluation method of occupant restraint system,starting from the crash safety regulations,the status of crash test and the requirements of enterprise safety performance development.This paper establishes a model of occupant restraint system for some vehicle models based on MADYMO software,and adds dynamic pitch conditions to the model to carry out dynamic analysis.And it will combine with the computer simulation of dynamics,imaging and multi-rigid body principle to analyze the test,so as to get the results of the impact of dynamic pitching of the platform on the dummy damage.The main contents of this paper are as follows:1)Introduce the research methods of vehicle crash test,understand the conventional sled simulation test method,master the evaluation rules of national standards and regulations for occupant protection,and understand the dummy structure and injury index.2)Using high-speed camera tracking software and piezoresistive accelerometers,angle and angular velocity sensors,to collect dynamic pitching motion data of some representative vehicle models in our company,as well as force and moment,displacement and acceleration data of each part of dummy,establish a database to analyze the processed data.3)Based on the principle of multi-rigid body and finite element method,and skillfully using MADYMO software,the simulation model of the restraint system of the corresponding vehicle type is established.The simulation of the pitching motion state of the model is consistent with that of the real vehicle,and the dummy damage value data are obtained.4)Establish the approximate static pitch angle to simulate the test with the existing sled simulation test equipment of our company.At the same time,the benchmarking test outline and the test scheme are formulated and designed.Collaborating with JinHeng Company,the only domestic sled system equipped with pitch function,the pitch test data of the corresponding vehicle type are collected.5)In order to analyze the effect of dynamic pitch on the injury of dummies,the results of the vehicle tests,simulation and sled simulation tests are benchmarked.更多还原