作为空间相机的一个关键部件，机身结构对保证相机正常工作至关重要。按照光学设计和卫星的要求，完成了机身结构的设计工作，选择高体份硅铝合金材料生产机身，选择焊接方式成型机身。通过有限元分析，计算了机身的静态和动态力学性能，证明了机身结构设计的合理性。计算了焊接应力的大小，证明焊接应力不会影响到机身结构的稳定性。最后，对机身结构进行了力学和热学试验，验证了机身的力学性能和稳定性。结果证明，高分辨率空间光学相机的机身结构可以使用高体份硅铝合金以焊接方式制造。

As a key part of a space camera, the camera body structure is very important to the normal operation of the camera. According to the requirements in the aspects of optical design and satellite, the body structure of a space camera isdesigned. The body structure is made of silicon-aluminum alloy and its configuration is completed by welding. Through finite element analysis, the static and dynamic mechanical properties of the camera body are calculated and the reasonability of the body structure is verified. The welding stress is calculated and the calculation result shows that the welding stress can not affect the stability of the body structure. Finally, the mechanical and thermal experiments are made on the body structure. Its mechanical properties and stability are verified. The results show that the body structure of the high-resolution space optical camera can be made of silicon-aluminum alloy by welding.