基于近场动力学的爆炸抛撒研究  

Study on the explosive spreading process based on peridynamics

作　　者：石玥 张光鹏 齐健 李文超 李保伟 Shi Yue;Zhang Guangpeng;Qi Jian;Li Wenchao;Li Baowei(School of Aerospace Engineering,North University of China,Shanxi Taiyuan,030051,China)

机构地区：[1]中北大学机电工程学院,山西太原030051

出　　处：《机械设计与制造工程》2023年第4期87-92,共6页Machine Design and Manufacturing Engineering

基　　金：国家自然科学基金(面上)资助项目(51775518)。

摘　　要：有限元方法在处理复杂裂纹问题时存在固有缺陷,基于非局部理论的近场动力学弥补了这一短板。为了将近场动力学方法应用于爆炸抛撒研究,针对固体燃料爆炸抛撒问题,采用近场动力学键理论,在合理假设的基础上提出了基于近场动力学的二维爆炸抛撒模型。进一步基于MATLAB平台开发了数值计算程序,并验证了程序在预测抛撒药云雾分布方面的有效性。最后研究了圆形、方形中心装药结构对爆炸抛撒结果的影响。仿真结果表明:程序所得16 ms内云雾分布形状及2 ms内云雾扩散速率较为准确;不同装药结构会影响云雾扩散速度及云雾分布形状;圆形装药更有利于抛撒药的分散。The finite element method has inherent flaws in dealing with complex crack problems in explosive dispersal,and peridynamics based on non-local theory compensates for this shortcoming.In order to apply the peridynamics method to the study of explosive dispersal,a two-dimensional explosive dispersion model based on peridynamics is proposed using the peridynamics bond theory and reasonable assumptions.Furthermore,a corresponding numerical calculation program is developed based on the MATLAB platform,and its effectiveness in predicting the distribution of pesticide clouds is verified.Finally,the influence of circular and square center charge structures on the explosive dispersion results is studied.The simulation results show that the distribution shape of cloud and mist within 16 ms and the diffusion rate of cloud and mist within 2 ms obtained by the program are relatively accurate.Different charge structures will affect the diffusion speed and distribution shape of clouds and mist.A circular charge is more conducive to the dispersion of dispersal.

关 键 词：近场动力学 爆炸抛撒 云雾分布 非局部理论 中心装药结构 

分 类 号：O389[理学—流体力学]