Analysis Of Parameter Calculation And Optimization In Vibration Isolation System Based On Genetic Algorithm

Research on parameter calculation and parameter optimization of vibration isolation system in towed array sonar is very important in naval engineering. In this paper, vibration isolation system was taken as the object for study. According to the structure characteristics of vibration isolation system, fluid-structure coupling field model of vibration isolation system was constructed by using finite element method. The influence of vibration isolation was calculated. The numerical simulation results were compared with experimental results. In addition,improved Genetic Algorithm (GA) method was used to realize parameter optimization of vibration isolation system.The main contents of this dissertation are given as follows:Firstly, fluid-structure coupling field model of 24m vibration isolation system was constructed by using ANSYS according to its structure characteristics. Based on finite element models, static analysis, modal analysis and harmonic response analysis have been done. The numerical simulation results were compared with experimental results to verify the model correctly. Secondly, material parameters and structural parameters which influence the capability of vibration isolation system were computed. And vibration isolation capability was calculated by considering acoustic module of vibration isolation system. Thirdly, the second development of ANSYS was based on APDL language. Parameter analysis files of vibration isolation system were established by using APDL language. Combined finite element method with adaptive improved pseudo parallel Genetic Algorithm, optimization procedures of adaptive improved pseudo parallel Genetic Algorithm was designed to realize parameter calculation and parameter optimization of vibration isolation system. In addition, vibration isolation system which include acoustic module was also calculated and optimized.Through the numerical modeling calculating research on all the aspects, a series of conclusions on vibration isolation characteristics and parameter optimization of vibration isolation system were obtained and they will be valuable in the practical project. These conclusions can be available for reference to the design of vibration isolation module in towed array sonar.