Optimization Design Of Conical Shell Structure Based On Topology Optimization Method

In the process of satellite launching, the vibration load and impact load generated by the launch vehicle engine can be passed to the satellite through the conical shell adapter at the connecting point of the satellite and the rocket,therefore,it is urgent to improve the mechanical properties of the working environment of the satellite. With the improvement of the requirement of the whole spacecraft vibration isolation ability in the aerospace field, study on reducing star arrow adapter weight, increasing the satellite payload, has become an important research direction in the field of the whole satellite vibration.In this paper, the topological optimization of the cone shell type star and arrow adapter is studied in this paper, the structure optimization design of conical shell adapter is carried out from the angle of light weight of structure and improvement of the environment of satellite mechanics, the main research work is as follows:1. The basic contents of topology optimization are introduced and the mathematical modeling of single objective and multi objective optimization is deduced. The application of compromise principle in multi objective optimization is discussed. The single objective optimization process based on the quality requirement is established,combined with the main operating conditions of the conical shell structure,a single objective optimization design for four cases is carried out, The mechanical properties of conical shell structure model were compared and analyzed before and after optimization.2. The conical shell structure is optimized under the condition of static load multi condition and Multi objective-multi condition. By the compromise principle, the multiple objectives are transformed into a comprehensive objective to optimize the design, the optimization results of different weight coefficients were given to different targets. From the multi objective optimization results,we can see that the final optimization result is the compromise of each sub goal to the comprehensive goal, for multi objective optimization, the existence of the sub objective function is monotone, the final optimization results may be a large deviation from the ideal results of some sub goals.3. Using the original structure and optimized structure as experimental examples completed statics and dynamics comparative experiments. Static testing system was designed to measure deflection. Natural frequencies were measured by hammering method;Comparison analysis between numerical examples and experiment results indicates that numerical calculation is efficient. Which also verified the topology optimization optimization cone shell structure design is correct.