作　　者： ; ;

机构地区： 中南大学交通运输工程学院高速列车研究中心

出　　处： 《中国铁道科学》 2003年第2期103-108,共6页

摘　　要： 在M D White和N Jones等人的研究基础上,充分考虑柱壳被挤压变形时塑性铰吸能,将其求解过程中的离散单元的数目由18个增至19个,进而使吸能和平均压塌力控制方程更接近试验实际情况。给出柱壳被挤压时平均压塌力的理论计算算例,并用LS DYNA软件对建立的帽型、点焊薄壁柱壳轴向挤压过程力学模型进行了数值模拟。计算结果显示,该结构撞击变形过程相对稳定,与修正的吸能和平均压塌力控制方程计算结果很接近;与M D White和N Jones等人的试验结果进行对比分析,证实帽型、点焊薄壁柱壳具有良好的能量吸收性能。 Based on M.D.White′s and N.Jones′ study results, the analysis process of the paper increases the number of mashed finite elements from 18 to 19 while taking into ful consideration of the absorption energy as it was crushed and deformed. It modifies the absorbing energy and mean collapse force governing equation to make the calculation more close to the test situation. Moreover it gives the theory calculation example of the mean collapse force when hat spot welded shell was crushed, establishes the mechanics model of hat spot welded shell and implements numerical simulation under LSDYNA software environment. The result shows that the bumping and deforming process are comparatively steady and the numerical result is very similar to the theory calculation result. Finally it compares and analyses the numerical result against the experiment result achieved by M.D.White and N.Jones and confirms that hat and spot welded shell has excellent energy absorbing capability.

关 键 词： 高速列车 车体 帽型点焊薄壁柱壳 吸能性能 理论计算 轴向挤压 数值模拟 铁路车辆

领　　域： [机械工程] [交通运输工程] [交通运输工程] [机械工程] [交通运输工程] [交通运输工程]