SIMULATION RESEARCH ON SHOCK ENVIRONMENT OF UNDERWATER EXPLOSION ON TYPICAL EQUIPMENT IN CABIN

In order to study the shock environment of typical equipment of the cabin structure, the cabin section was modeled by finite element method. The acoustic-structure coupling method was adopted to carry out the underwater explosion simulation research of the cabin under four cases, where the shock factors of the plate-shell were 0.57, 0.65, 0.83 and 1.11 respectively, mainly collecting the impact vertical acceleration. The influence law of different underwater explosion impact intensity on the shock environment of typical equipment in cabin was analyzed. The results show that the greater the shock factor, the greater the peak stress that the cabin will withstand, and the growth rate will gradually tend to be flat; the spectral velocity amplitudes of the same part are not significantly different; the maximum spectral velocity obtained by the measurement appears at the deck equipment, and there is a gradual attenuation trend as the position moves down.