触地核爆炸冲击波效应的数值模拟研究  

Numerical simulation for shock wave effect induced by ground blast

作　　者：王英杰 闫凤国 陈建营 薛海恩 梁基冠 Wang Yingjie;Yan Fengguo;Chen Jianying;Xue Haien;Liang Jiguan(Army Engineering University of PLA,Nanjing 210007,China;Sun Yat-Sen University,Zhuhai 519082,China)

机构地区：[1]陆军工程大学,江苏南京210007 [2]中山大学,广东珠海519082

出　　处：《山西建筑》2022年第1期58-63,69,共7页Shanxi Architecture

基　　金：国家自然科学基金项目(51378498,51578541,51979280)。

摘　　要：围绕触地核爆炸冲击波效应问题进行了数值模拟研究,分析了纯土介质和岩土混合介质中应力波的传播衰减特征及介质的动力响应特性,地下存在的软土层对爆炸冲击波所产生的峰值超压、最大位移、有效塑性应变存在着削减作用,并开展了纯土介质中触地爆的数值模拟,分析了土介质中爆炸应力波的传播过程和对应力波超压峰值、质点最大速度等,数值模拟得到的应力波传播过程和经验研究较为符合,且计算得到的应力比超压峰值和质点最大速度与经验公式拟合较好,验证了所采用的数值模拟方法的合理性和数值模型参数的准确性。The numerical simulation of ground contact explosion is carried out,and the propagation and attenuation characteristics of stress wave and the dynamic response characteristics of medium in pure soil medium and rock-soil mixed medium were analyzed.The results show that the soft soil layer underground can reduce the peak overpressure,maximum displacement and effective plastic strain caused by explosion shock wave.The numerical simulation of nuclear weapon’s ground impact explosion in pure soil medium is carried out,and the propagation process of explosion stress wave in soil medium is analyzed,as well as the peak overpressure of stress wave and the maximum velocity of particle.The stress wave propagation process obtained by numerical simulation is in good agreement with the empirical study,and the calculated stress ratio peak value of overpressure and maximum velocity of particle fit well with the empirical formula,which verifies the rationality of the numerical simulation method and the accuracy of the numerical model parameters.

关 键 词：核武器 触地爆炸 冲击波效应 动力响应 数值模拟 

分 类 号：TJ910.3[兵器科学与技术—武器系统与运用工程]