Dynamic Analysis And Reliability Research Of Missile-borne Storage System

In the process of R&D,storage and testing of missile-borne storage systems,vibration and shock are the main dynamic factors leading to device failure.How to find out the cause of the failure and evaluate the reliability of the system after the device fails is a very important research topic.In response to this problem,this article discusses the mechanical structure and hardware circuit from two aspects,combined with the mechanical dynamics theory and reliability knowledge,systematically studied the structural response problem of a certain type of missile-borne storage system and the failure problem in the circuit reliability evaluation.,To provide feasibility reference ideas for the design and reliability evaluation of the subsequent missile-borne storage system.In terms of mechanics,the dynamic response of the system under external loads was studied from the perspective of dynamics,and the shock-absorbing performance of the overall structure and the functional integrity of key parts during fall recovery were verified.In this paper,the finite element simulation method is adopted.First,the modal analysis of the overall structure of the missile-borne storage system is carried out,and the natural mode and frequency of the system are obtained.The preliminary work is done for the next step of the instantaneous modal dynamic analysis;The system has carried out the dynamic response analysis of the instantaneous mode,loaded acceleration loads of different waveforms,different pulse widths and different amplitudes respectively,analyzed the overload acceleration of the circuit components after a series of buffer vibration isolation of the system under a certain external acceleration excitation,and the shock absorption performance of the system protection structure is studied.Finally,the functional integrity of the key parts of the overall structure during fall recovery is verified through the display dynamics analysis.In terms of hardware,by analyzing the circuit composition and test principle of the bomb-borne storage system,the circuit composition of the system is analyzed from the perspective of the underlying components,and the composition block diagram of the system circuit is established.In view of the redundancy and complexity of the module analysis,And to ensure the integrity of the test data,divide reliability prediction units according to component types,analyze and study the main failure modes and failure mechanisms of various components,based on the unit’s circuit system Establish and form typical failure cases,and use fault tree analysis and D-S evidence theory to study the fault problems in system reliability assessment.From the perspective of fault tree theory,establish the fault tree model of its system,and conduct qualitative and quantitative analysis to calculate the failure probability and importance of various components.Experiments have verified the feasibility of using the fault tree to analyze the failure problems in the system reliability assessment;From the perspective of DS evidence theory,the possible causes of system failure are obtained through historical fault data,and BPA is obtained based on Bayesian theory,and then the improved DS evidence theory is used to study the fault problems in system reliability assessment.