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摘要: 由于爆炸螺栓解锁过程具有瞬时性、变形大等特点,同时接触爆炸过程中交界面处介质阻抗相差 较大,因此基于计及材料强度的SPH 方法,在控制方程的粒子近似过程中将其转化为粒子密度及质量对物理 量近似过程影响较小的形式,建立了爆炸螺栓三维SPH 数值模型,分析了爆炸螺栓解锁过程中的冲击特性。 同时,通过与LS-DYNA软件的计算结果进行对比,验证了本文所建立数值模型的准确性和可靠性。Abstract: Abstract:Inviewofthefactsthattheunlockingprocessofanexplosiveboltisinstantaneous,theexplosiveboltcanundergoalargedeformationinthisprocess, andtheimpedancesofthematerialsin theinterfacehavegreatvarianceinthecourseofthecontactexplosion,basedontheSPH methodconsideringmaterialsstrength, thegoverningequationistransformedtoaformwhichcanreducetheinfluencesofparticledensityandmassontheprocessofthephysicalquantityap roximation.Thena three-dimensionalSPH modelfortheexplosiveboltisbuilttostudytheimpactcharacteristicsinthe unlockingprocessoftheexplosivebolt.Besides,thecomputationalresultsarecomparedwiththe onescomputedbytheLS-DYNAsoftwaretoverifytheaccuracyofthemodelbuiltinthepaper
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Key words:
- mechanicsofexplosion /
- unlockingprocess /
- SPH /
- explosivebolt /
- materialstrength /
- impactenvironment
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