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水下爆炸的AUTODYN模拟分析研究

发表时间:2011-08-15  浏览量:1292  下载量:629
全部作者: 孙学武
作者单位: 中国人民解放军73911部队;南京理工大学机械工程学院
摘 要: 利用AUTODYN仿真程序对TNT水下爆炸的峰值压力进行模拟,分析状态方程和网格密度不同对数值模拟的影响,并得到了精度良好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。
关 键 词: 海洋计算;水下爆炸;状态方程;网格划分;峰值压力;远场分析
Title: Simulation analysis of underwater explosion based on AUTODYN
Author: SUN Xuewu
Organization: Troops of 73911, Chinese People�s Liberation Army; School of Mechanical Engineering, Nanjing University of Science & Technology
Abstract: The underwater explosion models of the TNT charges were simulated by AUTODYN software, the peak pressures of the explosions were obtained and analyzed. The influences of the state equation and the grid density towards the simulation results were analyzed, 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: the smaller state residual if the SHOCK polynomial equation is adopted; 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.
Key words: marine technology; underwater explosion; state equation; mesh; peak pressure; far�field analysis
发表期数: 2011年8月第15期
引用格式: 孙学武. 水下爆炸的AUTODYN模拟分析研究[J]. 中国科技论文在线精品论文,2011,4(15):1430-1435.
 
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