基于SPH法的爆炸螺栓冲击特性研究  

Research on impact characteristics of explosive bolts using SPH method

作　　者：初文华 孙龙泉[1] 姚熊亮[1] 田昭丽 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《爆炸与冲击》2013年第3期249-254,共6页Explosion and Shock Waves

基　　金：国家自然科学基金重点项目(50939002);国家自然科学基金项目(50809018;51009035);国家自然科学基金委员会-中国工程物理研究院NSAF联合基金项目(10976008);教育部高等学校博士学科点专项科研基金项目(20102304120025);黑龙江省自然科学基金项目(E201047;A200901)~~

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。In view of the facts that the unlocking process of an explosive bolt is instantaneous,the explosive bolt can undergo a large deformation in this process,and the impedances of the materials in the interface have great variance in the course of the contact explosion,based on the SPH method considering materials strength,the governing equation is transformed to a form which can reduce the influences of particle density and mass on the process of the physical quantity approximation.Then a three-dimensional SPH model for the explosive bolt is built to study the impact characteristics in the unlocking process of the explosive bolt.Besides,the computational results are compared with the ones computed by the LS-DYNA software to verify the accuracy of the model built in the paper.

关 键 词：爆炸力学 解锁 SPH法 爆炸螺栓 材料强度 冲击环境 

分 类 号：O383[理学—流体力学]