舱室结构对炸药内爆响应特性的数值模拟研究

Numerical Simulation of Response of Cabin Structure to Explosive Implosion

为研究炸药在舰船舱室内爆炸的毁伤作用效果,利用ANSYS/LS-DYNA数值模拟软件建立带有加强筋结构的典型单舱室模型,采用流固耦合算法模拟舱室内爆下冲击波的传播和舱壁的结构响应,分析不同炸药质量与起爆位置对舱室壁的影响。研究表明:在冲击波作用下,舱壁中心相比角隅处的变形更为严重;舱室角隅处容易引起冲击波的汇聚叠加,汇聚冲击波峰值压力明显大于初始冲击波峰值压力;随着炸药质量增加,舱室变形更加严重;相对炸药装量而言,炸药位置对舱室内冲击波压力和舱壁变形影响不明显。本结果可为弹药毁伤和舰艇防护研究提供参考。

In order to study the damage effect of implosion on the cabin,a typical single cabin model with stiffeners is established by using ANSYS/LS-DYNA numerical simulation software.Using the fluid-structure coupling algorithm,the propagation and structure of blast wave under cabin internal blast are simulated,and the effects of different explosive mass and initiation position on the cabin are analyzed.The research shows that under the action of blast wave,the deformation at the center position of the cabin wall is more serious than that at the corner.The corner of the cabin is apt to cause the convergence superposition of the blast wave,and the peak pressure of the convergence blast wave is obviously greater than that of the initial blast wave.As the mass of the explosive increases,the deformation of the chamber becomes more serious.Compared with the explosive charge,the explosive position has no obvious effect on the blast wave pressure and bulkhead deformation in the cabin,which can provide reference for ship damage and protection.