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The test vehicle was instrumented to measure acceleration in X,Y,Z directions on the front-end module.Then,the stability of the acceleration signal was verified.The duty cycle was converted from time domain to vibration spectrum, and the validation of the vibration spectrum was examined by a finite element model.Next,the vibration fatigue was analyzed and the optimization for the failure of the front-end module was conducted.Finally the optimized structure was proved by proving ground.This research results could applies to the front-end module design of new platform vehicles,which could effectively avoid the problem of structural cracking.