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摘要本文基于AUTODYN对水下爆炸进行模拟研究。首先对水下爆炸的发展和国内外的研究进展进行了综述，接着对本文中要用的部分相关理论和公式进行了论述。在文章主要研究部分，首先探究了观测点对模拟冲击波峰值压力的影响，收获了一个意外的发现，针对本文的研究，在一定药量范围内模拟结果与经验公式值符合得很好，而观测点的影响由于论据过少无法确定；另外一个探究因素是网格密度对模拟冲击波峰值压力的影响，发现随着网格密度的减小，冲击波曲线峰值压力就越接近经验公式值，说明在本次模拟中网格密度大不利于模拟出准确的冲击波峰值压力；最后研究了水的状态方程对模拟结果的影响，发现shock状态方程比多项式方程有很大的优势，模拟结果更加接近于经验公式值。本文通过自编vb程序，实现使用经验公式计算出炸药在水下爆炸时的冲击波冲量、峰值压力、气泡脉动周期和气泡最大半径等值。并且实现接入到AUTODYN进行运行。33900
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关键词 水下爆炸，数值模拟，冲击波压力峰值，网格密度，经验公式，状态方程
毕业论文设计说明书外文摘要
Title EXPLOSIVE explosion simulation system design
Abstract
Uderwater explosion simulation are studied in this paper based on AUTODYN.First, the development of underwater explosions at home and abroad and the research progress were reviewed, and then discussed the part of the theory of the paper and which equations have been used. The main part of the paper,first the effect of the simulation of shock wave peak pressure which observation points bring about had been disccused, an unexpected discovery had been harvest, for this paper, within a certain range of TNT,got a good result on comparing simulation results with empirical values, but the effect of the observation points can not be determined because of lack evidence; The other factor had been disccused is that the effect of shock wave peak pressure which element density bring about ,had found that with the decreasing of the element density, the closer shock wave curve peak pressure approached empirical value. Description heavy element density is not conducive to simulate shock wave curve peak pressure accurately in this simulation.In the end disccused the effect of the simulation results which water EOS bring about, It found that the SHOCK EOS has a great advantage over polynomial EOS.the simulation results arecloser to the empirical value. Through self-programming of vb, using empirical formula to calculate the shock wave impulse explosive underwater explosion, the peak pressure of the bubble and the bubble pulsation cycle maximum radius equivalents. And to achieve access to the run-AUTODYN
Keywords Uderwater explosion ,numerical simulation, shock wave peak pressure, element density, empirical formula, EOS
目 录
1引言 1
1.1 研究意义 1
1.2 水下爆炸概况 1
1.2.1 水下近场爆炸 1
1.2.2 深水爆炸 1
1.3 水下爆炸数值研究概况 2
第一章 水下爆炸相关理论 3
1.1水下爆炸基本现象及特点 3
1.2冲击波及其理论 3
1.2.1水下爆炸冲击波经验公式 4
1.2.2水下爆炸能量输出结构 6
1.2.3冲击波冲量公式 6
1.2.4冲击波能量密度公式 7
1.2.5冲击波能 7
1.2.6空化现象 8
1.3气泡脉动 13
1.3.1气泡现象 13
1.3.2 气泡相关理论和经验公式 14
第二章 数值模拟软件AUTODYN 20