基于组合几何与自定义网格的粒子输运模拟方法  

Particle Transport Simulation Method Based on Constructive Solid Geometry and Custom Mesh

作　　者：张玲玉[1,2] 李瑞 李刚[1] 付元光[1,2] 邓力[1] ZHANG Lingyu;LI Rui;LI Gang;FU Yuanguang;DENG Li(Institute of Applied Physics and Computation Mathematics;CAEP Software Center for High Performance Numerical Simulations:Beijing 100088,China)

机构地区：[1]北京应用物理与计算数学研究所,北京100088 [2]中国工程物理研究院高性能数值模拟软件中心,北京100088

出　　处：《现代应用物理》2022年第1期34-40,共7页Modern Applied Physics

基　　金：能源局重大专项资助项目(2019ZX06002033)。

摘　　要：针对传统的组合几何的建模及粒子输运方式不能满足复杂几何复杂输运、大尺度场景长程输运和高精度高分辨率统计计数等问题,基于自主研发的蒙特卡罗粒子输运软件JMCT,开展了基于组合几何与自定义网格的建模方法、粒子输运方法及统计计数方法研究。充分发挥组合几何建模便捷和输运高效、自定义网格建模灵活和计算精度高的优势,并将此方法应用到了线缆系统电磁脉冲光电输运和高能闪光照相直穿照射量模拟中。模拟结果表明,基于组合几何与自定义网格的粒子输运方法的计算结果与参考解相对偏差小于5%,模拟方法可行,结果可信。Traditional modeling and particle transport methods based on the constructive solid geometry cannot meet the requirements of the complex transport in complex geometry,long-range transport in large-scale scene and high-precision statistical counting.By using the self-developed Monte Carlo particle transport software JMCT,the modeling method,the particle transport method,and the statistical counting method based on constructive solid geometry and custom mesh are developed.These methods have been applied to the photon-electron simulation of cable SGEMP response and the exposure simulation of high-energy flash radiography.The numerical results show that the relative deviation between the calculated results and the reference values is less than 5%,and these simulation methods are feasible and the results are reliable.

关 键 词：粒子输运 蒙特卡罗 JMCT 组合几何 自定义网格 

分 类 号：O439[机械工程—光学工程] TL65[理学—光学]