水下爆炸载荷的静态等效方法

水下爆炸对水中结构物的作用一是直接压力,另一个是使结构物产生速度和加速度,而且,不仅仅是结构物产生速度和加速度,其附加质量(也称附连水质量)也产生相应的加速度,即:爆炸要同时改变结构物和附加质量的动能与动量。水下爆炸作用下结构物的响应研究极其复杂,计算量极大。如果能采用静态等效的方法分析结构的响应,不但使结构分析过程得到简化,更重要的是为结构设计提供一个等效载荷值和施加方法。根据能量原理、动量原理和达朗贝尔原理,给出了水下爆炸载荷静态等效研究的分析方法和计算方法,并通过算例对该算法进行了验证。结果表明:提出的静态等效方法可行。

A static equivalence studies on underwater explosion load

Underwater explosion exerts two effects on underground structure;one is the direct-pressure;the other is giving the underground structure both velocity and acceleration in such a way that both the structure itself and the added mass(added mass of entrained water) is given acceleration,namely the fact that underwater explosion causes a change in the kinetic energy and the momentum in both the structure and the added mass.It follows that the research into the response of structure acted on by underwater explosion poses a very complicated task involving considerable calculation.The analysis of the response of structure using an equivalent static analysis method could not only simplifies the structure analysis,but also produces an equivalent load value and application measure for structure design.This paper features methods designed for the analysis and calculation of equivalent static load of underwater explosion,based on the principle of energy and momentum as well as d’Alembert principle.The results verify the feasibility of this method.