遭受水下爆炸的舰船缩比模型毁伤评估

Damage Evaluation of a Ship Scaled Model Subjected to Underwater Explosion

对某型舰船缩比模型遭受水下爆炸的弹塑性动力响应进行数值仿真与实爆试验研究,基于总纵强度毁伤和局部塑性变形的表征参数进行毁伤等级评估。结果表明,加速度响应和毁伤等级随冲击因子增大而增大,局部响应与船体振型相关,局部塑性变形毁伤等级最高时总纵强度毁伤等级并不是最高。研究成果可为实船爆炸试验评估提供参考。

The dynamic response of a ship scaled model subjected to underwater explosion is studied using numericalsimulation and realistic explosion tests. Based on the characteristic parameters of longitudinal strength and local plasticdistortion, the grade evaluation of anti-deflection capability of the model is conducted. The results show that the accelerationresponse and damage grade increase with the shock factors, and the local response is related to the vibration mode. When thedamage grade based on the local plastic distortion reaches the highest value, the damage grade based on longitudinal strengthis not necessarily the highest. The result is of significance for evaluation of ship shock tests.