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

发布时间：2018-03-20 10:38

本文选题：光滑粒子法　切入点：聚能射流　出处：《振动与冲击》2016年04期 　论文类型：期刊论文

【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。
[Abstract]:In order to solve the problem that the grid distortion caused by the large deformation of the traditional mesh-based numerical method in simulating the linear shaped jet problem, it is difficult to carry out the calculation. The formation of linear shaped charge jet with different charge types and its penetration into metal target were studied numerically by the smooth particle method (SPH) realized by self-programming. The proposed algorithm can provide a new way for the numerical simulation of linear shaped jet. The forming process of linear shaped jet is realized effectively by using SPH method. The velocity of jet head obtained by numerical simulation has less than 10% error compared with the test. Then the mass of charge is established. The linear shaped jet models of different charge types cover with the same mass and charge cross section width are obtained. By numerical simulation, the characteristics of the jet formed by different projectiles and the variation of the opening width and penetration depth with time were obtained. The formation of linear shaped jet and the law of penetration after penetration of different projectiles were studied. It can provide reference for the design of linear shaped jet.
【作者单位】：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;
【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)
【分类号】：O358

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