矿用救生舱焊接部位数值模拟处理方法

Numerical Simulation Approach in Welding Parts of Mine-used Rescue Capsule

矿用可移动式救生舱抗爆性能数值分析可为舱体设计和数值检测提供有力的修改依据。救生舱舱体各部件多为焊接连接,其处理方式的不同直接影响计算结果,基于有限元计算软件LS-DYNA,对救生舱单节舱体在冲击载荷作用下的动态响应进行了数值模拟,其焊接部位采用了ruled(壳单元)补接和实体单元点对点对接方式,结果表明:舱体最大位移Smax与ruled单元的厚度存在着负指数衰减规律。通过对比实体单元蒙皮和壳体单元蒙皮的最大变形结果,ruled单元厚度取3～5 mm时,二者结果较为一致。

Numerical simulation analysis on refuge chamber antiknock performance provides the modified basis for the design of the rescue capsule and numerical detection. The various components of rescue capsule are mostly welded connections, and different processing approachs directly affect the calculation results. Based on the finite element software LS - DYNA, the dynamic response of a rescue capsule under blasting are simulated by numerical method, and the welding position uses the ruled （ shell elements） connection and solid elements point -to- point docking mode. The results show that the cabin maximum displacement Smax diminished exponentially with the thickness of ruled elements, through comparing maximum deformation results in solid elements skin and shell element skin, the two results are more consistent when the thickness of ruled elements is 3 - 5 mm.