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

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (6) : 132-136.

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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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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.

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high speed fragment / cabin near shipboard / shock loading / theory study

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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