太空城市构型比较
Comparison of Space City Configurations

本文比较了太空城市的具有代表性的构型，包括刘慈欣圆杆、斯坦福圆环、伯纳尔球体、刘慈欣椭球、奥尼尔圆筒，分析了各种构型的受力特点，计算了在典型材料和尺寸下的应力大小。将太空城市的发展方针归纳为：“由近及远，由易到难，市场推动，效益为先，多方协作，共同发展”，并初步建议了从低轨到高轨，从地月系到日地系的逐步实施计划。同时开展旋转式太空太阳能发电站的工程应用，不但能够获取大量清洁能源，减少温室气体排放，而且也为地球“遮阳”，具有减缓全球气候变暖的作用。
The typical configurations of space city are compared, including Liu Cixin rod, Stanford ring, Bernal sphere, Liu Cixin ellipsoid and O’Neill cylinder. The stress characteristics of each configuration are analyzed, and the stress magnitudes are calculated under typical materials and sizes. The development policy of space city is summarized as follows: “from near to far, from easy to difficult, market driven, benefit first, multi-party cooperation and common development”, and the gradual implementation plan is preliminarily proposed from low orbit to high orbit, from Earth-Moon system to solar-terrestrial system. At the same time, the engineering application of rotary space solar power station can not only obtain a lot of clean energy and reduce greenhouse gas emissions, but also “shade” the earth, which has the effect of slowing down global warming.