Study On The Structural Optimization Of The Launching Canister Of Storage And Transport Of An Anti-aircraft Rocket

Improving the mobility and flexibility of rocket weapon is the core content of the research of multiple rocket weapon,which is directly related to the fast support index of multiple rocket weapon system.This paper aims to discuss the problem of heavy weight of air defense rocket launcher,and takes LCST(storage,transport and delivery tank)as the research object.By means of topology optimization and multi-objective optimization,the overall optimization design of its structure is carried out,in order to achieve the best performance.The main research contents of this paper are as follows:(1)The gas jet impact characteristics of the storage,transportation and distribution tank during the rocket launching process were obtained by numerical simulation method,and the impact load was calculated to obtain the impact curve of the intake air surface of the storage,transportation and distribution tank during the rocket launching process.(2)A six-wheel pavement excitation model was established based on the filtered white noise method,and the pavement spectral curves under different grade pavements were obtained by Simulink numerical simulation.Then,a Simulink model of 9 degrees of freedom vibration system of air defense rocket launcher was established and the vertical vibration acceleration curves of storage,transport and delivery boxes at different speeds were obtained.(3)Based on the topology optimization theory of variable density method,a new structure of storage,transportation and distribution tank with reasonable material distribution was obtained.Through modal analysis,researchers can obtain the maximum stress value of the storage vessel under various working conditions and its associated deformation image;In addition,researchers can obtain images of the impact force of the container on contact with air and its associated vibration acceleration to better understand the transient dynamic characteristics of the container.The results show that the new structure of the storage and transportation box meets the rigidity requirement and has plenty of room,so it can be further optimized to improve the mobility.(4)To determine the optimization variables of storage,transportation and delivery box structure and its selection range,constraints and objective functions.The optimal response surface model of storage,transportation and delivery tank was established by using the Latin hypercube experimental design method.On this basis,the optimization mathematical model of storage,transportation and distribution boxes is established.The multi-objective genetic algorithm is used to optimize the storage,transportation and distribution boxes,and the Pareto frontier solution set is obtained.Through analysis and selection of appropriate optimization results,the optimal storage and delivery box structure of an air defense rocket is obtained.