基于SPH方法对不同药型罩线性聚能射流形成及后效侵彻过程的模拟  

Simulation of formation and subsequent penetration process of linear shaped charge jets with different liners based on SPH method

作　　者：杨刚[1] 傅奕轲 郑建民[1] 胡德安[1] 

机构地区：[1]湖南大学机械与运载工程学院特种装备先进技术与仿真教育部重点实验室,长沙410082

出　　处：《振动与冲击》2016年第4期56-61,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11102065);高等学校博士学科点专项科研基金新教师类(20110161120038)

摘　　要：为了解决传统基于网格的数值方法在模拟线性聚能射流问题时因大变形而导致网格畸变使计算难以进行的问题,通过自编程实现的光滑粒子法(SPH)对不同药型罩线性聚能装药射流形成及其侵彻金属靶板的过程开展了数值模拟研究,所实现的算法可以为线性聚能射流数值模拟研究提供新途径。所开展的研究首先基于已有的线性聚能射流试验模型进行模拟分析,采用SPH方法有效实现了线性聚能射流的形成过程,数值模拟获得的射流头部速度与试验比对误差在10%以内。然后建立了装药质量、药型罩质量和装药横截面宽度相同的前提下不同药型罩线性聚能射流模型,数值模拟获得不同药型罩形成的射流特征以及侵彻金属靶板的开口宽度和侵彻深度随时间的变化规律。研究得到的不同药型罩线性聚能射流形成及后效侵彻规律可为线性聚能射流的设计提供参考。In order to solve the distorted mesh problem caused by large deformation in simulation of linear shaped charge jets with the traditional mesh-based method,the self made code of SPH method was applied to simulate the formation process of linear shaped charge jets and their subsequent penetration process in metal plates. The SPH method implemented here was taken as an alternative method for numerical study of linear shaped charge jets. Firstly,the numerical model of linear shaped charge jets based on tests was constructed and simulated with SPH method. The formation process of linear shaped charge jets was simulated successfully with SPH method. Comparing numerical results with experiment data,it was shown that the error of jet head velocity is less than 10%. Then,the models of linear shaped charge jets with different liners but the same charge mass,liner mass and width of charge cross section were built.Through numerical simulation,the forming characteristics of linear shaped charge jets,and the time histories of cutting width and penetrated depth of target metal plates were obtained. The laws of formation and subsequent penetration process of linear shaped charge jets with different liners obtained here provided a reference for designing linear shaped charge jets.

关 键 词：光滑粒子法 聚能射流 侵彻 数值模拟 

分 类 号：O383[理学—流体力学]