Numerical Simulation Study on Intensity Threshold of Marine Gearbox Subjected to Underwater Explosion Load

Considering the shock-resistance threshold of equipment on board as the important base for ship shock-resistance design and assessment, a finite element model of marine gearbox was established to get the characteristic of shock-resistance threshold. The shock-resistance threshold was analyzed using endurable stress method. Results indicate that endurable stress method is a direct and effective computational method for getting shock-resistance threshold of marine equipment. The shock-resistance threshold of marine gearbox is related to the peak value of acceleration and pulse width of input load.