球形和等长径圆柱装药在爆炸近区内 载荷差异的实验研究

球形和等长径圆柱装药在爆炸近区内载荷差异的实验研究

摘要: 为了研究爆炸近区内装药形状对爆炸载荷的影响,运用压杆法测量了爆炸容器内壁的压力。通过实验发现,对于圆柱装药径向方向上的正反射爆炸载荷,等长径圆柱装药的压力峰值、冲量与相同当量下球形装药对应量的比最大超过2。还通过实验验证了数值模拟,并运用数值模拟获得2种装药形状下爆炸载荷的静水压、密度、粒子速度,得到爆炸近区内2种装药形状载荷的差异以及该差异随爆心距离的变化规律。
- 爆炸力学 /
- 爆炸载荷 /
- 压杆法 /
- 装药形状 /
- 爆炸近区
Abstract: Thepressureattheinnerwalloftheexplosionvesselwasmeasuredbyusingthepressure barmethodtoinvestigatetheinfluencesofthechargeshapeontheblastloadinginthefieldnearthe explosivesource.Theexperimentalresultsdisplaythatthemaximumratioofthepeakandimpulseof thereflectedloadingintheradialdirectioninducedbythecylindricalchargewiththelengthequalto itsdiametertothatinducedbyanequivalentsphericalchargeislargerthantwo.Numericalresults, obtainedbythenumericalmodelwhichisvalidatedbytheexperimentalresults,revealthedifferences ofhydrostaticpressure,density,particlevelocityofblastloadingbetweenthetwochargesandthe changesofthedifferencesoverthescaleddistancefromtheblastcenter.
- mechanicsofexplosion /
- blastloading /
- pressurebarmethod /
- chargeshape /
- smallscaled distance