基于蒙特卡罗射线追踪的航天器空间环境因素暴露通量统一计算方法  

General algorithm for calculating space environmental exposure flux based on Monte-Carlo ray tracing

作　　者：焦子龙 胡松林[2] 姜利祥[1,2] 黄建国 孙继鹏[2] 朱云飞 JIAO Zilong;HU Songlin;JIANG Lixiang;HUANG Jianguo;SUN Jipeng;ZHU Yunfei(Science and Technology on Reliability and Environmental Engineering Laboratory;Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China)

机构地区：[1]可靠性与环境工程技术重点实验室 [2]北京卫星环境工程研究所,北京100094

出　　处：《航天器环境工程》2019年第4期350-356,共7页Spacecraft Environment Engineering

基　　金：中国航天科技集团公司创新研发项目;可靠性与环境工程技术重点实验室基金项目

摘　　要：航天器空间环境效应分析评估的首要条件是获取空间环境因素的暴露通量.文章分析总结了蒙特卡罗方法在原子氧、微流星体、太阳光压、气动力、辐射剂量、材料放气污染等环境因素暴露通量计算中的应用,提出基于蒙特卡罗射线追踪方法实现统一的空间环境因素暴露通量计算,并给出计算流程及初步验证.统一算法的计算结果与理论值(或文献值)符合较好,证明其能够正确计算环境因素暴露通量.The orbital spacecraft is influenced by the space environment,which would cause the performance degradation of the spacecraft or its subsystems,even the mission failure.Therefore it is necessary to analyze and evaluate the space environmental effects,among which the primary concern is to determine the exposure flux of the space environmental factors.In this paper,the Monte-Carlo method is applied in the calculation of the exposure flux of the space environmental factors,such as the atomic oxygen,the micrometeoroid,the solar pressure,the atmospheric drag,the radiation dose,and the outgassing contamination.A general algorithm of calculating the exposure flux based on the Monte-Carlo ray tracing is proposed,and the calculation procedure is described.The new algorithm is verified through test cases.It is shown that the calculation results with the general algorithm are in good agreement with theoretical or reference values.

关 键 词：航天器 空间环境 暴露通量 蒙特卡罗方法 射线追踪 

分 类 号：V520.5[航空宇航科学与技术—人机与环境工程] O242.2[理学—计算数学]