Analysis of acceleration response characteristics of ship bull underwater bottom explosion
The impact vibration response of the ship hull varies under different underwater explosion conditions.In or-der to obtain the characteristics of the impact vibration response of the ship hull under the action of underwater bottom explo-sion,the pressure and ship hull impact acceleration data measured in underwater explosion tests were compared and ana-lyzed.Then,wavelet analysis method was used to decompose and reconstruct the acceleration response signals of the target ship's bilge and deck,and obtain the peak acceleration and energy distribution of different deck layers at different time fre-quencies.The analysis results show that under the action of non-contact explosion at the bottom of the charge,the impact vi-bration response of the target ship is mainly affected by shock waves and hysteresis flow,and the influence of secondary pressure waves is very small;Transfer of vibration energy from the bottom to the deck to the low-frequency range;95％of the energy in the frequency band above 156 Hz at the bottom of the cabin is dominated by mid to high frequency response;The energy in the 78～20 Hz frequency band on the deck accounts for 77％,with the main response being medium to low fre-quencies.
万方数据
维普
