低地球轨道环境原子氧对航天器表面材料聚酰亚胺作用的数值模拟

在建立数学物理模型的基础上，对氏地球轨道环境和地面实验环境下，有无保护层的聚酰亚胺所受原子氧冲蚀作用进行了进行了成功的数值模拟，获得了具有工程应用价值的数值计算结果，并讨论了数学物理模型中各参数对基蚀曲线形状的影响。从数值模拟结果和美国太空实验结果的比较可以看出，本文数据模拟的结果是正确的。该项工作对航天器的设计具有重要指导意义。

NUMERICAL SIMULATION ON ATOMIC OXYGEN ACTION TO SPACECRAFT SURFACE MATERIAL--POLYIMIDE IN LEO

With the development of astronautics and the wide exploration of space resource,the duration of spacecraft on its orbit becomes longer and longer.The spacecraft is required to have a long lifetime and a high reliability.In low earth orbit(LEO) environment,the most important factor which affects spacecraft lifetime are due to its surface inter with atomic oxygen and solar ultraviolet radiation.For polyimide,which is the main structure material,the role of atomic oxygen is the most important.In this work we apply the basically mathematics and physic model to numerically simulate influence of atomic oxygen on polyimide with or without coated layer both in LEO and ground experiment environments.The results compare very well with the LDEF results.As a result,the present work provides a good guideline to the design of spacecraft.