中文摘要：

空间碎片在太空中的累积越来越多，它们主要聚集在离地球表面2000km高度以下空间区域内。空间碎片引起的空间“污染”越来越威胁到在轨工作飞行器的安全。这里主要对600km、700km和800km轨道高度，倾角分别为30°、60°和98°的低轨道空间区域的空间碎片分布进行了仿真计算。可以为在轨飞行器安全运行及未来飞行器在空间布局决策提供一定参考。

英文摘要：

More and more space debris are accumulated in the near-earth space, mostly with altitudes less than 2000 km. Such debris have polluted the near-earth space, and increasingly threaten routine operations of spacecrafts. Certain simulations of the distributions of space debris are presented for cases of orbits of altitudes 600km,700km, and 800km, and with inclinations 30° ,60° ,and 98°. The results may help keeping spacecrafts safe and supporting decision-making of future deployments of spacecrafts.