【摘要】 基于辅助设计软件Hypermesh与有限元计算软件LS-DYNA,对某简单钢结构救生舱体在冲击载荷作用下的动态响应进行数值模拟。舱体单元的最大位移与压力增大时间成存在极小值的负指数衰减规律,并随超压作用时间成存在极大值的指数增长规律,进行数值仿真检测时不能忽略压力载荷时间参数的影响。环向加强筋的厚度从8 mm增大到14 mm时,舱体单元最大位移减小3 mm;轴向加强筋从8 mm增大到14 mm时,舱体单元最大位移仅减小0.9 mm,说明环向加强筋对减小救生舱表面位移、提高救生舱的抗冲击能力起主要作用。更多还原

【Abstract】 Based on Hypermesh and LS-DYNA,the dynamic response of a rescue capsule of simple steel structure under blasting was simulated by numerical method.The maximum displacement on the cabin diminishes exponentially with the pressure rise time,and increases as the overpressure affecting time,the numerical simulation of detection can not ignore the effects of time-parameters.The maximum displacement of cabin unit decreases 3 mm while the thickness of circumferential ribs increass from 8 mm to 14 mm,and it decreases only 0.9 mm as the thickness of axial ribs increases from 8 mm to 14 mm.Circumferential ribs plays an important role on reducing surface displacement and increasing the strength of the cabin.Certain theoretical basis about designing and testing is provided by the results of numerical simulation.更多还原