基于AUTODYN的气泡与固定壁面相互作用数值模拟

Numerical Simulation of Underwater Explosion Bubble Interactions with a Solid Boundary Based on AUTODYN

阐述了AUTODYN软件模拟水下爆炸气泡的原理及过程,通过球对称模型以及重力场中气泡的实验数据与AUTODYN计算结果的对比,验证其在计算气泡脉动时间和压力等方面的计算精度,并以此为基础研究近壁面水下爆炸气泡的动力学特征以及影响因素,包括无量纲距离对气泡形状的影响,固壁面对气泡最大半径、脉动周期和射流时间的影响,以及近固壁面气泡射流速度及压力的变化等,总结相关规律,为气泡的数值模拟研究提供参考。

This paper introduces the principle and procedures of using AUTODYN to numerically simulate gas bubbles produced by underwater explosions. By comparing the experimental data to the simulated resuits concerning the spherically symmetric model and its gravity field, the accuracy of AUTODYN in calculating pulsation time, pressure, and other parameters are validated. Then, the dynamics characteristic of underwater explosion gas bubbles near a solid boundary is analyzed, including various factors that affect bubble shapes, maximum radius, pulsation period and impact time. The variation in velocity and pressure of the bubble jet is also discussed.