薄壁圆管侧向冲击动力响应的仿真分析  

Computer Simulation on Response of Circular Tubes under Lateral Impact

作　　者：秦庆华[1] 路国运[1] 雷建平[1] 张善元[1] 

机构地区：[1]太原理工大学应用力学研究所,山西太原030024

出　　处：《太原理工大学学报》2003年第5期513-516,共4页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目 ( 10 0 72 0 3 6) ;山西省归国留学基金资助项目 ( 2 0 0 0 -2 6)

摘　　要：对两端固支薄壁圆管经受楔形锤体侧向冲击的动力响应进行了实验研究和计算机仿真 ,获得了不同冲击能量下两端固支薄壁圆管的整体变形模态和冲击点附近局部压溃模态的发展过程 ,计算机仿真结果与实验结果的一致性令人满意。实验研究和计算机仿真结果表明 ,局部变形和整体变形的耦合与径厚比 (D/h)和跨径比 (2L/D)等因素有关。当圆管的总体位移 (Wf)达到和圆管的直径同一量阶时 ,伴随圆管轴线伸长而产生的轴力不可忽略 。The dynamic response of fully clamped thin wall circular tubes under lateral impact of wedge using experimental method and computer simulation is presented. The deformed models of thin wall tubes are obtained and the procession of dynamic deformation is given by computer simulation,which were agree well with experimental results. The results of experimental study and computer simulation demonstrate that the coupling degree of local denting and global deformation relates to ratios of diameter ( D ) to thick ( h ) and span (2 L ) to diameter ( D ).The role of membrane force caused by large deformation is more important, the global deformation may be controlled by membrane force after final deflection ( W f) gets diameter value.

关 键 词：薄壁圆管 侧向冲击 局部凹陷 数值模拟 

分 类 号：O374.2[理学—流体力学]