爆炸冲击波在不同介质中传播衰减规律的数值模拟

Numerical simulation for spread decay of blasting shock wave in different media

采用ANSYS/LS-DYNA软件对冲击波在水、土、混凝土中的衰减规律进行了模拟研究,由计算得到的压力和能量的曲线,通过分析表明波阻抗对冲击波的初始峰值大小有很大的影响;土中冲击波的持续时间最长,混凝土中冲击波衰减较快;验证了冲击波速和波强度有关,波的强度越大,波速越高;能量的大小和介质的可压缩性有关,土中能量最大,水中能量最小。

The attenuation law ofblasting shock wave in water,soil and concrete were numerically simulated by ap-plying ANSYS/LS-DYNA.The results showed that the magnitude of wave impedance has greater effects on the initial peak of shock wave;the shock wave in soillasts the longest time and decays more slowly;the relationship between the speed and the intensity of shock wave was approved,the greater the intensity,the higher the speed;the media compressibility has greater effects on the energy of shock wave,the energy of shock wave in soil is maximum,but minimum in water.