典型舰船水下爆炸冲击环境仿真

Simulation of Shock Environment on Ship Underwater Explosion

利用冲击谱描述方法,对舰船在水下爆炸载荷作用下的冲击环境进行了数值模拟和分析.利用MSCDytran软件计算在爆炸载荷作用下舰船各测点的加速度,用加速度计算得到冲击谱,并总结出爆炸参数和冲击谱的关系.通过分析表明:冲击谱的谱值由船底外板到最上层甲板呈衰减的趋势;各测点加速度谱值随爆炸距离的增加近似呈指数衰减;各测点的加速度谱值随炸药量的增加近似呈抛物线增加.

The shock environment of the ship structure under underwater explosion is simulated by the shock spectrum. The displacements, velocities and accelerations of some testing point are achieved by MSC Dytran. The shock spectrums are achieved by the calculation of accelerations. The relations between the shock parameters and spectrum are concluded. The analyses indicate： the value of shock spectrum decreases from the outer shell of ship to the upper deck; the value of shock spectrum is approximately exponential attenuation with the distance between the explosive and ship; the value of shock spectrum is approximately parabola increased with the increase of quantities of explosive.