高速破片在防雷舱结构中引起的冲击荷载的理论研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (6) : 132-136.

论文

高速破片在防雷舱结构中引起的冲击荷载的理论研究

唐廷1,2 朱锡2 侯海量2 陈长海2

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Theory Study of Shock loading Induced by High Speed Fragment in Cabin near Shipboard

TANG Ting1,2， ZHU Xi1， HOU Hai-liang1，CHEN Chang-hai

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摘要

运用一维平面波理论，研究大型高速破片在防雷舱结构中引起的冲击荷载，得到了初始冲击荷载的理论公式。与有限元计算结果进行比较，证明了理论公式的正确性。运用理论计算公式分析了破片参数对冲击荷载的影响，结果表明：破片速度与冲击荷载峰值成正比，速度越快，峰值越大；速度越慢，峰值越小。而破片速度对冲击荷载的衰减没有影响，即不同速度的破片在水中引起的冲击荷载具有相同的衰减规律。不同厚度破片引起的冲击荷载的具有相同的峰值，但有不同的作用时间。破片的越厚，荷载作用时间越长；破片越薄，荷载作用时间越短。最后基于理论分析确定了几何衰减的函数形式，采用数值试验数据进行回归分析，得到了冲击波的几何衰减系数。

Abstract

Appling one dimension plane wave theory, shock loading induced by high speed large fragment in cabin near shipboard is studied, a theory formula of initial shock loading is attained. After comparing with the result of FEM, the theory formula is proved right. The influence of parameters of fragment to shock loading was analyzed through theory formula, the results shows that the velocity of fragment is in direct ratio with peak value of shock loading. The more rapidly fragment moves, the bigger the peak value; the more slowly fragment moves, the smaller the peak value. And the velocity of fragment has no influence upon decay of shock loading, namely, the shock loading of fragments with different velocity decay accord with rule. The shock loading induced by fragment with different thickness have same peak value, but different duration. The thicker the fragment, the longer duration; the thinner the fragment, the shorter duration. At last, based on theory analysis, the form of geometrical attenuation is established. After the regression analysis about the datum of numerical test, the parameter of geometrical attenuation of shock wave was got.

导出引用

唐廷;朱锡侯海量陈长海. 高速破片在防雷舱结构中引起的冲击荷载的理论研究[J]. 振动与冲击, 2013, 32(6): 132-136

TANG Ting;ZHU Xi;HOU Hai-liang;CHEN Chang-hai. Theory Study of Shock loading Induced by High Speed Fragment in Cabin near Shipboard[J]. Journal of Vibration and Shock, 2013, 32(6): 132-136