Analysis And Optimization Of Dynamic Response Characteristics Of Launcher

The launcher can be affected by various kinds of impact during storage,transportation and missile launching.The local and dynamic amplification effects can be caused by the above shocks passing through the structure,which can affect the launching performance of the missile launching system,and will damage the missile launching system and even lose its operational capability.Therefore,it is very important to establish an effective launching device model and to study the dynamic response characteristics of the launcher.The background of this kind of problem is in the development process of complex structure equipment,in order to obtain a good running state,there is a clear requirement for the dynamic response of the structure’s natural frequency and deformation displacement.Based on this background,this paper focuses on the parametric modeling method of the launcher represented by the launch tube,and analyzes its dynamic response characteristics;on this basis,it combines the response model approximation method and the intelligent optimization algorithm to the launch.The vibration characteristics optimization method of the device has been studied in depth.In this paper,the response surface method based on experimental design and genetic algorithm are used to optimize the dynamic response characteristics of the structure.By changing the relevant structural parameters of the transmitting device,the multi-order natural frequency of the transmitting device meets the set range or is as close as possible to the expected value.This type of problem can be attributed to the dynamic optimization problem of the structure satisfying the multi-order natural frequency requirements in the dynamic sense of the structure.Firstly,the paper describes the development of structural dynamic response at home and abroad,and studies the optimization of structural dynamic response characteristics.It also briefly introduces basic theoretical knowledge related to structural dynamics theory,calculation methods,and vibration equations.Then,based on the modeling of the dynamic response characteristics of the launch system,the related research and descriptions of the equivalent modeling method were carried out respectively for the launching device,the equivalent elastic body and the damping structure.Without considering the specific construction of the unit and the details of the calculation of the state variables,this paper uses the response surface method to approximate the sensitivity of the launcher’s structural parameters.The computational workload is small and versatility is strong.For the problem of structural dynamics optimization under multi-order frequency constraints,the genetic algorithm is combined with the response surface method to establish the relationship between the variables of the relevant structural parameters and the natural frequency of the launcher,determine the optimal model,and iterate to multi-order natural frequencies to meet the requirements.Finally,a certain optimization effect is obtained,The natural frequencies of the main components such as the launch tube and the projectile were changed,the vibration characteristics of the launch device were improved,and the launch status of the launch device was stabilized,the combat effectiveness was improved,and the dynamic response of the genetic algorithm based on the dynamic response surface was verified.The feasibility and efficiency of the feature optimization problem have certain reference significance for the application of the optimization algorithm in the optimization of the actual engineering structure.