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.
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