Hanging Structure Optimization Design Of Aircraft Engine

In recent years, the plane is toward large-scale development, the structure is more complex, bear the load also more and more big. At the same time, because of various reasons, possible damage is becoming more and more big. Due to the economy requirement, in aircraft structure design, aircraft weight loss has become important issue. Using new composite materials is one of the main means of aircraft weight loss, another is reasonable structural design.Hanging device fixed the aircraft engine on the plane, and transfer the engine thrust, engine weight and under overload, absorb the engine vibration and isolate engine fire area, its structural form, strength, weight and safety is one of the important factors affect the performance of the flight. Based on a certain type of engine under civilian aircraft wing hang device as the research object, using the finite element analysis software ANSYS to analyze it, the main content is as follows:1. Through the analysis of hanging structure, the finite element model is established. Calculated and typical working conditions hanging under the load, constraint condition is determined.2. The typical working conditions of hanging structure strength analysis, obtained the displacement and stress nephogram, and compared with the actual stress distribution, and analyze the results, the optimal space can be determined.3. According to the result of strength analysis, select hang liang before and the thickness of the bottom beam in order to optimize the design variables, using ANSYS to lightweight design of hanging, guarantee the strength and stiffness in the design requirements within the scope of the condition, reduce the hanging weight.4. After the optimization of hanging structure modal analysis, extracting the natural frequency and vibration model, and compared with external excitation frequency, to make sure that will not resonate with engines and wings, validate the rationality of optimization.