【摘要】 基于射线追踪原理提出了微流星体撞击通量的计算方法。针对定向运动的平板进行了计算并与文献值进行了比较,最大误差1. 5%,符合较好。针对IADC防护手册中给出的立方体、球体、简化空间站等构型算例和三平板遮挡算例进行了计算,并与MDPANTO的结果进行了对比,总通量误差分别为3%、 2%、 3. 5%和4%,符合较好。通量分布结果符合物理规律,但立方体构型对地朝向的计算结果误差达16%,需进一步研究。利用该方法对某复杂构型大型航天器微流星体撞击通量进行了计算,计算结果符合物理规律。更多还原

【Abstract】 The computation method for the impact flux of a micrometeoroid based on the ray tracing algorithm is proposed. For the test case of an oriented moving plate, the results are compared with the reference values, and the relative errors are less than 1. 5%. For the test cases of a cube, a sphere, a simplified space station and the parallel plates, presented in the Protection Manual of IADC, the results are compared with those of MDPANTO, and the relative errors of the total flux are less than 3%, 2%, 3. 5% and 4% respectively. The flux distribution is agreed with the physical laws, but the relative error for the Earth direction of the test case of the cube is 16%, which needs for further research. By using the proposed methods, the impact flux of a micrometeoroid for a large-scale spacecraft with complex geometry is computed, and the result is agreed with the physical laws.更多还原