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通过LS-DYNA对地下爆炸试验模型检测救生舱强度的实验进行模拟,在TNT当量法的基础上用TNT代替瓦斯空气混合气体,得出救生舱壳体在井下瓦斯爆炸时的受力情况;救生舱壳体正面的压力从底部往顶部递减,中心向两侧递减,压力在0.441 0~0.532 6 MPa,持续时间为242.5 ms,在经历最大的压力峰值后,还会有几个小的压力峰值;救生舱壳体背部的力从底部往顶部递减,中心向两侧递减,压力在0.2027~0.3144 MPa;救生舱壳体顶上和侧面的压力随着离正面的距离增大而逐渐减小,但减小的幅度很小,压力在0.27 MPa。
The experiment of underground explosion test model to test the strength of rescue cabin was simulated by LS-DYNA. The TNT was used to replace the mixed gas of gas and air based on the TNT equivalent method to get the stress of the life-saving tank shell when it was in mine gas explosion. The pressure on the front of the shell decreases from the bottom to the top, and the center decreases to both sides. The pressure is 0.441 0 ~ 0.532 6 MPa and the duration is 242.5 ms. After experiencing the maximum pressure peak, there will be several small pressure peaks ; The force on the back of the life-saving tank shell decreases from the bottom to the top, and the center decreases toward the sides with a pressure of 0.2027 ~ 0.3144 MPa; the pressure on the top and the side of the shell of the life-saving tank decreases with increasing distance from the front, However, the reduction is very small, the pressure at 0.27 MPa.