水下爆炸的AUTODYN模拟分析研究
首发时间:2010-11-29
摘要:利用AUTODYN仿真程序对TNT水下爆炸的峰值压力进行模拟,分析了状态方程和网格密度不同对数值模拟的影响,得到了良好精度且计算速度较快的数值模拟方法。仿真结果表明,在进行小药量水下爆炸远场分析时,采用SHOCK状态方程得到的多项式状态误差小;合适的网格对远场计算影响较大,但网格过大对精度提高不明显。通过与试验数据的对比,验证了该方法的可靠性。
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Simulation analysis of the Simulation of underwater explosion based on AUTODYN
Abstract:The underwater explosion models of the TNT charges were simulated by AUTODYN software, the peak pressures of the explosions were obtained and analyzed. This paper analyzed the influences of the state equation and the grid density towards the simulation results, and the numerical simulation method with faster computation speed and numerical simulation modified precision was deduced accordingly. Taking the small amount of powder's far-field underwater explosion as the study, the result showed several referable conditions: (1) the smaller state residual if the Shock polynomial equation was adopted. (2) Proper grid density affects the computation precision much, yet if the grid density is too high, this effect would be weakened. Through the comparison with experimental data, the reliability of the method was verified.
Keywords: Underwater Explosion State Equation Mesh Peak Pressure Far-field Analysis
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