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摘要: 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。Abstract: Theunderwaterexplosionmechanismoffluid-structureinteractionwasexploredbasedon thespectralelement.Afieldseparationtechniquewasproposedtoavoidthedistortionphenomenonof thetotalfieldmodelproducedbythepropagationofincidentwaveinthefluidmesh.Andascatteredfieldnumericalmodelforunderwaterexplosionfluid- structurecouplingproblemswasestablishedby theoreticalderivation.Calculationresultsbyaself-developedcodeshowthatthescattered-fieldnumericalmodelisaneffectivesolutiontotheincident- wavedistortion,ithasahighercalculationaccuracythanthetotalfieldmodel, anditcanbeappliedtosolvefluid-solidcouplingproblemsduringunderwaterexplosion.
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Key words:
- mechanicsofexplosion /
- fluid-solidcoupling /
- fieldseparation /
- underwaterexplosion /
- spectralelement
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