切割索爆炸冲击波的试验及数值模拟研究

Test and Numerical Research of Blast Wave of Shaped Charge Cutting Cables

为了控制切割索工作时的附带损伤,对带橡胶护套切割索切割平板工件工况下的背向压力进行了测试,建立该工况下的数值模型并进行了仿真。仿真结果中射流侵彻深度与试验结果一致,而空气冲击波压力低于相应的实测值,分析认为其原因为实测值为传感器迎风面的反射压,仿真结果为空气自由场压力。最后得到了该工况条件下切割索背向压力估算的平面比距离公式。

In order to control the future low lateral damage,the shock wave pressures on the back direction of work-piece from the shaped charge cutting cable,which was protected by rubber sheath,were tested.Numerical simulation was carried out for the cutting test.The results show that the simulated cutting depth is consistent with the test result,while the simulated peak pressures of shock wave are lower than the test ones,the reason for that the tests recorded the reflected pressure on windward of the pressure sensors,and the simulated results were those of free air flow field.An empirical plane scaled distance equations is suggested for the calculations of peak explosion pressure of cutting cable for the specific case.