冲击波荷载下大楼地下室的三维动力分析

Three Dimensional Analysis of Basement under Dynamic Load of Nuclear Blast

大楼地下室的战时功能开发是人防工程平战功能转换技术研究的重要内容，对其进行抗力验算则是这项技术的关键．据此，将直接积分的三维有限无法应用于冲击波荷载下大楼地下室的动力响应的分析，讨论了单元类型、网格密度、时间步长等对计算结果的影响，通过对加团前后的强度进行验算，得出了一些规律性认识和有价值的结论．

In this paper, three dimensional FEM is adopted to analyze the reaction of basement under dynamic load of nuclear blast. After discussing the influence of element type, mesh density and time step on the precision and stability of the calculation, a calculation model of the example basement is constructed to check the strength of it before and after consolidation. Some regular and valuable conclusions are also drawn.