水中爆炸条件下结构毁伤评估方法研究

Study on the damage assessment methods of structures subjected to underwater explosion

水中爆炸会引起水中结构如码头、船坞等产生构件变形、局部破坏乃至整体损毁。为合理确定水中爆炸条件下作用在水中结构上的荷载及其毁伤特性，通过分析比较现有理论及方法，提卅了不同工况下的荷载计算方法、水中结构毁伤等级划分标准，以及简化计算法、数值模拟法等2种毁伤评估方法；通过对某型高桩码头的响应及毁伤情况进行验算，综合给出了给定当量下高桩码头的安全阈值，对比验证了分析方法的适用性和准确性，为进一步研究水中结构的动态响应及毁伤提供了基础。

The underwater structures, such as the wharf and dock ,will be locally deformed, partially or monolithically damaged in underwater explosion. In order to reasonably confirm the dynamic load on underwater structures and the damage characteristics in underwater explosion, the classical theories and methods are analyzed contrastively. The method to determine the underwater explosion loads in different conditions, the damage assessment criterion and methods including the short-cut method and the numerical simulation method of the underwater structure are presen- ted. By trial-computing the dynamic response and damage of a typical type of wharf, the safe loads at a given equiva-lent of TNT are obtained, the applicability and veracity of the damage assessment methods are confirmed. The study results could provide theoretical bases for the further investigation of dynamic response and damage assessment of un-derwater structrures.