轨道车辆新型组合结构吸能装置耐碰撞性分析  

Crashworthiness analysis of new composite structure energy-absorbing devices in railway vehicle

作　　者：刘艳文[1] 肖守讷[1] 张志新[1] 阳光武[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《计算机辅助工程》2012年第5期6-10,共5页Computer Aided Engineering

基　　金：中央高校基本科研业务费专项基金(SWJTU09CX046);"十一五"国家科技支撑计划(2009BAG12A04-A11)

摘　　要：为保证列车碰撞时车体次要部位或附加装置尽可能多地吸收撞击能量,减少财产损失和人员伤亡,提出组合结构吸能装置的设计思想.根据耐撞性车体吸能装置设计原理,设计出不同截面形状管的组合结构吸能装置.利用ANSYS/LS-DYNA对其分别进行动态仿真,研究其吸能特性,并取其最优方案与试验结果进行对比,从而验证仿真模型的正确性.通过对原始设计方案外箱板的截面形状和吸能管的端部结构加以改进,设计出两种新型的组合结构吸能装置.仿真分析结果表明,结构的截面形状对整个装置的吸能特性有较大影响,改变结构的截面形状可以有效调节碰撞界面力峰值和均值载荷,改进后的吸能装置耐撞性综合指标更优。To ensure that the secondary positions or additional devices can absorb crash energy as far as possible and reduce the property damages and casualties, the design idea of composite structure energy- absorbing devices is proposed. The composite structure energy-absorbing devices with different cross- section shape pipe are designed based on the design principles of energy-absorbing devices of crashworthiness vehicle. The dynamic simulations are performed on the devices to study the energy- absorbing characteristics by using ANSYS/LS-DYNA. The optimum case is compared with the test result and the correctness of the simulation models is proved. Two new composite structure energy-absorbing devices are designed by improvement on original design case at cross-section shape of the outer boxboard and the structure of the energy-absorbing pipe end. The simulation analysis results show that the cross- section shape has greater influence on the energy-absorbing characteristics of the whole structure, the peak interface force and average load can be effectively adjusted by changing the cross-section shape of the structure, and the comprehensive crashworthiness indices of the improved energy-absorbing devices are superior.

关 键 词：轨道车辆 耐碰撞性 组合结构 吸能装置 非线性有限元 仿真 ANSYS LS-DYNA 

分 类 号：U270.1[机械工程—车辆工程] TB115.2[交通运输工程—载运工具运用工程]