转动惯量误差对汽车碰撞模型计算结果的影响  

Influence of Rotational Inertia Errors on Simulation Results of Vehicle Collision Model

作　　者：张健[1] 张鑫[2] 高金贵[1] 李江[3] 

机构地区：[1]北华大学汽车与建筑工程学院,吉林吉林132013 [2]人民交通出版社,北京100011 [3]吉林大学交通学院,吉林长春130022

出　　处：《西南交通大学学报》2015年第1期90-96,共7页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(51178001);吉林省教育厅科学技术研究项目(2014)

摘　　要：为了有效控制车辆转动惯量误差对汽车碰撞模型计算结果的影响,应用摄动理论分析了车辆转动惯量误差对模型计算结果的影响规律.应用碰撞前车速曲线平均斜率、车速方向角曲线平均斜率和角速度曲线平均斜率,研究了车辆转动惯量误差对模型计算结果的影响程度.根据影响程度能够确定满足模型计算结果精度要求的车辆转动惯量取值范围.研究结果表明:当限制车辆转动惯量误差在±7.94%范围内时,模型计算结果相对误差≤5%.To control effectively the influence of rotational inertia errors in the vehicle collision model on the simulation results, the influence rules were analyzed by perturbation theory. The influence degrees were investigated using the average slope of the pre-impact vehicle speed curve, the pre-impact vehicle speed angle curve, and the pre-impaet angular velocity curve. According to the influence degrees, rotational inertia ranges that meet the demand of the simulation result accuracy could be determined. The result shows that when the rotational inertia error is controlled within ±7.94% , the relative error of the simulation result is less or equal to 5%.

关 键 词：转动惯量误差 汽车碰撞 误差分析 动量方程 

分 类 号：U491.3[交通运输工程—交通运输规划与管理]