Research on Effects of Ship Motion on Interface Fatigue Damage of Solid Rocket Motor

doi:10.3969/j.issn.1000-1093.2012.08.015

Abstract

Abstract: It is very difficult to evaluate SRM (solid rocket motor) damage due to ship motion. In order to solve this problem, a fatigue damage evaluation method of interface between propellant and liner under swing loading was established for some SRMs. The damage property between propellant and liner was acquired by using cyclic loading test with fixed shear stress. The nodes' shear stress spectra of SRM were obtained by means of finite element analysis method. A rain-flowing counting method and Miner's linear cumulative damage theory were applied to evaluate the interface fatigue damage. The test and simulation results show that the shear stress amplitude and logarithmic number of damage accords with exponential equation; the life of SRM under certain shipboard conditions is at least 8.62% shorter than that under storage situation.

Key words: solid mechanics, ship-based missile, solid rocket motor, bonding interface, finite element analysis, fatigue damage

CLC Number:

V435

QU Kai， ZHANG Jie， ZHANG Xu-dong. Research on Effects of Ship Motion on Interface Fatigue Damage of Solid Rocket Motor[J]. Acta Armamentarii, 2012, 33(8): 986-990.

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