讨论在考虑强度约束和动力学约束的情况下,全电推进卫星的方圆主承力过渡结构的轻量化设计.利用三维拓扑优化技术对方圆过渡结构进行优化设计,确定方圆过渡结构的传力路径,并据此进行创新构型设计.对创新构型进行强度及动力学分析,验证其在强度性能、动力学性能上的优越性. This paper discusses the light-weight design of all-electric propulsion satellite under the circumstance of considering the strength constraint and the dynamic constraint, and optimizes the design of the square-shaped transitional structure using the three-dimensional topology optimization technology to determine the force transmission path of the square-shaped transitional structure Based on this, the innovative configuration design was carried out, the strength and dynamics of the innovative configuration were analyzed, and its superiority in strength and dynamic performance was verified.