基于场分离的水下爆炸流固耦合计算方法

Underwater explosion calculation with a field separation technique

基于谱单元方法对水下爆炸流固耦合机理进行了研究,针对总场模型中入射波在流体网格中传播会产生失真现象的问题,采用场分离技术,通过理论推导建立了水下爆炸流固耦合问题的散射场数值模型。经过编程计算比较得出,散射场数值模型有效解决了入射波在流体网格中传播的失真问题,比总场模型计算精度更高,可较好地应用于水下爆炸流固耦合问题的求解,为水下爆炸瞬态流固耦合的研究提供参考。

The underwater explosion mechanism of fluid-structure interaction was explored based on the spectral element.A field separation technique was proposed to avoid the distortion phenomenon of the total field model produced by the propagation of incident wave in the fluid mesh.And a scattered-field numerical model for underwater explosion fluid-structure coupling problems was established by theoretical derivation.Calculation results by a self-developed code show that the scattered-field numerical model is an effective solution to the incident-wave distortion,it has a higher calculation accuracy than the total field model,and it can be applied to solve fluid-solid coupling problems during underwater explosion.