客车侧翻一步碰撞算法中的接触修正方法研究  

Research on the Contact Modification Method for One-step Algorithm for Bus Rollover Collision

作　　者：王童[1] 那景新[2] 闫亚坤[2] 张苹苹[2] 李婷婷[2] 

机构地区：[1]长安大学 [2]吉林大学汽车仿真与控制国家重点实验室

出　　处：《汽车技术》2015年第6期31-34,49,共5页Automobile Technology

摘　　要：提出一种弹塑性耦合迭代的接触修正方法,将该方法用于客车侧翻一步碰撞算法中,通过对假定的最大变形构形进行碰撞接触判断、弹性回弹计算及塑性能量平衡迭代计算,可获得计算车体结构最终变形所需的初始解变形构形。以某12 m公路客运车辆的典型车身段为研究对象,利用该方法进行了客车侧翻碰撞模拟试验,结果表明,与Ls-dyna等增量法及侧翻试验结果对比,该算法计算效率高,试验次数少,模拟时间是Ls-dyna等增量法的1/10,具有实际应用价值。An elastic-plastic coupling iteration method is proposed, which is used in one-step algorithm for bus rollover collision. By collision contact estimation of the assumed maximum deformation contour, elastic resilience calculation and plastic energy balance iteration calculation, the original solution deformation configuration needed to calculate body structure＇s final deformation can be obtained. The typical bus body section of a 12-meter bus is selected as the research object, and this method is applied in bus rollover collision simulation test, which shows that compared with Ls-dyna and rollover test, the one-step algorithm features high calculation efficiency, less test cycles, and simulation duration is only one tenths of Ls-dyna method, which has practical application value.

关 键 词：客车 侧翻一步碰撞算法 弹塑性耦合迭代 接触修正 

分 类 号：U462.3[机械工程—车辆工程]