水下爆炸冲击波反射压力计算方法的改进  

Improvement on the Calculation Method for Reflected Pressure of Shock Wave in Underwater Explosion

作　　者：严泽臣 岳松林 邱艳宇 王建平 赵跃堂 施杰 李旭 YAN Zechen;YUE Songlin;QIU Yanyu;WANG Jianping;ZHAO Yuetang;SHI Jie;LI Xu(State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact,Army Engineering University of PLA,Nanjing 210007,Jiangsu,China;Unit 91053 of PLA,Beijing 100070,China;College of National Defense Engineering,Army Engineering University of PLA,Nanjing 210007,Jiangsu,China)

机构地区：[1]陆军工程大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007 [2]91053部队,北京100070 [3]陆军工程大学国防工程学院,江苏南京210007

出　　处：《兵工学报》2024年第4期1196-1207,共12页Acta Armamentarii

基　　金：国家自然科学基金项目(12202494);国家重点研发计划项目(2021YFC3100700)。

摘　　要：重力坝是一类常见大型混凝土水工建筑。为探寻适用于其近区水下爆炸冲击波反射压力的计算方法,利用冲击波阵面上的质量、动量和能量3个守恒基本关系式,以及凝聚介质状态方程,严格推导出物理内涵明晰的刚性壁面水下爆炸冲击波反射压力计算方法。通过连续介质中冲击波速与粒子速度之间的关系,给出其中水的状态参数k的确定方法,揭示状态参数k随入射冲击波压力呈双指数衰减规律,发现入射压力在725 MPa以上时,k值的变化对冲击波反射压力计算结果有着重大影响。通过与Cole[12]、Henrych[14]和罗泽立等[15]提出的计算方法及数值仿真进行对比验证分析,结果表明:新提出的计算方法具有适用范围更广、计算精度更高的特点,且首次从理论上揭示水下爆炸冲击波反射压力系数范围为2.00~4.49。Gravity dam is a kind of common large concrete hydraulic construction.In order to explore a calculation method for the reflected pressure of shock wave applicable to the near area of hydraulic structure,a method for calculating the reflected pressure of shock wave of the underwater explosion on the rigid wall with clear physical connotation is derived strictly by using the three conservation basic relations of mass,momentum and energy on the shock wave front and the equation of state of condensed medium.Based on the relationship between shock wave velocity and particle velocity in continuous medium,the determination method of the state parameter k of water is given,and the law of state parameter k decaying exponentially with incident shock wave pressure is revealed.It is found that the change of k value has a significant impact on the calculation result of reflected pressure of shock wave when the incident pressure is above 725 MPa.By comparing with the calculation methods proposed by Cole[12],Henrych[14],and Luo,et al[15],and the numerical simulation,the results show that the proposed calculation method has a wider application scope and higher calculation accuracy,and it also reveals theoretically for the first time that the reflection pressure coefficient of underwater explosion shock wave ranges from 2.00 to 4.49.

关 键 词：水下爆炸 反射压力 刚性壁面 Hugoniot关系式 数值模拟 

分 类 号：O382.1[理学—流体力学]