【作者】 吴曼林；

【导师】 刘玉存；

【作者基本信息】 华北工学院 ， 武器系统与运用工程， 2004， 硕士

【摘要】 冲击波感度是衡量炸药爆轰的难易程度和起爆性能的重要指标，而小隔板试验（SSGT）是研究冲击波感度最普遍的方法。由于小隔板试验要耗费大量的人力、物力，那么通过对小隔板试验进行数值模拟仿真，就能为以后的小隔板试验选择最佳的实验方案，降低实验的费用，缩短研究的周期，甚至取代小隔板试验。本文应用LS-DYNA程序对小隔板试验进行了数值模拟。从国内外标准高能炸药冲击起爆实验中得到的数据来确定受主炸药的点火增长反应模型的参数，对HMX/F2641的90%TMD和 95.5%TMD的两种受试炸药， RDX/F2641的80%TMD、90%TMD、95%TMD的三种受试炸药进行了数值模拟。通过对数值模拟计算的结果与实验的结果对比，说明本文的计算模型较好的反映了小隔板试验的情况。对各种受试炸药的冲击波感度（隔板值）的误差都限定在0.05mm之间，比国内外文献中报道的隔板试验的模拟结果都更为精确。另外还对点火增长模型中的不同参数进行调整，定性地测定参数对冲击波起爆性能的影响。根据国内外对热点起爆的研究，探讨对点火增长模型的改进及其在LS-DYNA程序中的应用，为进一步在数值模拟中研究不同炸药粒度对冲击波感度的影响奠定基础。通过数值模拟计算和分析得出如下主要结论：由数值模拟的结果可以看出，用标准高能炸药冲击起爆实验中得到的数据来确定受主炸药的点火增长反应模型的参数是可行的。本文的计算模型较好的反映了冲击波感度实验（SSGT）的情况。根据实验结果调整相关参数的数值模拟结果，能够有效地再现实验中难于观察的细节过程。对点火增长模型中的不同参数进行调整，发现对冲击波起爆感度的影响，成长项比起爆项的影响大。有关研究方法可应用于起爆、传爆序列的设计和模拟仿真研究，为许多相关课题的研究提供帮助。更多还原

【Abstract】 Shock sensitivity is an important index that can judge the difficult or easy degree of detonation and detonating performance of explosive. Small scale gap test (SSGT) is one of the most general methods that study shock sensitivity. Owing to consumption of so much manpower and material resources in small scale gap test, SSGT is simulated for making it possible to choose the best experimental programme, and reduce the experimental expenses, and shorten the research periods, and even replace SSGT. Small scale gap test is numerically simulated with LS-DYNA in this paper. The data from several standard shock initiation and HE performance experiments at home and abroad were used to determine the parameters required for the Ignition and Growth model of the acceptor explosive. The two test explosives of HMX/F2641 (90%TMD and 95.5%TMD) and the three test explosives of RDX/F2641 (80%TMD、90%TMD and 95%TMD) are numerically simulated. Compared with the experimental results, the results of numerical simulation show that this calculated model is in accord well with the real process of SSGT. The error of shock sensitivity is within 0.05mm, which is more precise than those reported on documentation at home and abroad. In addition, the different parameters in Ignition and Growth model are adjusted in order to qualitatively examine the influence on shock initiation behavior made by the parameters. According to the initiation research at home and abroad, the improvement in Ignition and Growth model and the application of the model in LS-NYNA are discussed, which provides a good basis for further research about the different effects on the shock sensitivity by particle size of different explosive in numerical simulation.Main conclusions could be reached by numerical simulation and analyses as follows:As can be seen from the results of the numerical simulation, it’s possible that the data <WP=6>from several standard shock initiation and HE performance experiments are used to determine the parameters required for the Ignition and Growth model of the acceptor explosive are feasible.This calculated model is in accord well with the real process of shock sensitivity experiments (SSGT). The results of numerical modeling by adjusting the related parameters based on the results of experiments effectively show the details hard to be observed from experiments.By adjusting the parameters of the Ignition and Growth, we can see that the growth terms have a much greater influence on the shock sensitivity than the ignition terms.This research technique in the paper could be used for the design and simulation of detonation initiation and propagation sequence, and also benefit other research related to the similar topic.更多还原