Research On Topology Optimization Technology For Airborn Electro-optical System

For the requirements of airborne weapon system, airborne electro-optical system asks for higher stabilization precision,smaller volume,lighter weight and higher reliability. How to develop a kind of higher-performance and lighter-weight airborne electro-optical system in a short time, is the key technique in the resarch of airborne electro-optical system. The U-frame is a connecting part between airborne electro-optical system and helicopter. In this paper, the object of this research is U-fram. By using topological optimization method, to achieve more lighter U-fram of airborne electro-optical system is studied.This paper discusses the state and the engineering application domain of topological optimization technique. Furthermore, the tendency of lightweight design of electro-optical platform is analyzed. The topological optimization technique is used to design lighter part and the finite element method is used to analyze the intensity of the part. Finally, the configuration design of the U-frame is achieved, the aim of lighter weight of the key part U-frame is achieved too.Firstly, it discusse the statics analysis of the U-frame in this paper. According to experience,the boundary condictions, such as loads and the topological space of the U-frame are determined. The objective function is to minimize the weight of the U-frame. The constraints are the displacement、stress and the natural frequency. The material distribution of the U-frame is optimized based on Optistruct software. Furthermore, the size of the U-frame is optimized. Its mechanical property is analyzed based on finite-element analysis method. Finally, the optimization result shows that the weight reduces by14.9%. It is valuable for conceptual design of the the U-frame.Topological optimization is a conceptual design method. By using topological optimization method, it obtains material distribution in a given design domain of the the U-frame..Then, the size of the optimized model is optimized. At last, the global optimal solution is achieved. Furthermore, the method and the technological process of lightweight design of parts of airborne electro-optical platform are summarized in this paper. The method and the technological process are based on topological optimization technique. It provides theoretical guidance for structural design of airborne electro-optical platform.