关键词: 裂纹止裂, 脉冲放电, 热应力场, 温度场, 采煤机 截割传动系统 滚筒调速 缓冲减振

Abstract: The couple of current, temperature and stress are studied in metal thin plate with crack at the moment while pulse current is switched on. In analysis, the finite methods are used. The analysis process is composed of the thermal-electrical coupled and thermal-mechanical coupled. The evolutive process of current-temperature-stress is simulated in numerical analysis, the thermal stress around crack is solved at the moment while the pulse current is switched on. The temperature field and stress field results of numerical simulation correspond to the results of theoretical analysis.

Key words: Crack arresting, Pulse current discharge, Temperature field, Thermal stress field, Shearer Cutting transmission system Roller speed regulation Buffering and damping