The Dynamic Analysis Of Locking Mechanism Of Gas Release In Rocket Launcher

When the rocket launch,the locking and release performance of the locking mechanism is not only related to the shooting accuracy and intensity,but also related to the safety of launcher and personnel.In this paper,it took a locking mechanism of gas release in rocket as the research objective,and used the dynamic finite element method to analyze the locking and release process of this locking mechanism,with focusing on the kinematics characteristic,stress,stiffness,strength etc.of the parts and components during the process.The main structure of this paper is as follows:The first chapter mainly introduced the background and significance of this study,as well as the domestic and foreign research status.The second chapter mainly introduced the composition and working mode of the locking mechanism of gas release,and put forward that there were two kinds of conditions in the locking and release process.According to the characteristics of these two cases,the focus of attention and analysis were given,which laid the foundation for the study.In the third chapter,it firstly introduced the basic principle and theory of the finite element method with anexample of the two-dimensional triangular elements with three nodes.And then,a finite element analysis model was established by finite element software ABAQUS,starting from the point of view,combined with the structural characteristics of the locking mechanism and work characteristics of the analysis case.It focused on the determination of material parameters,boundary conditions setting and the rationality of the mesh.In the fourth chapter,the dynamic analysis of the normal release process was done,and the movement mode of the various components of this locking mechanism was obtained.The simulation results showed that the normal release processcould be completed successfully with the existing structure.But there would be several collisions between locking hook and rocket after release,and it could change the motion characteristics of locking hook by changing the structure of the locking hook and the torsion spring stiffness coefficient..The fifth chapter focused on the stress state and the rigid strength of the key components such as the locking groove,the safety ring,the base and the locking hook in the forced release process.The simulation results showed that the forced release process could be completed successfully and safely with the existing structure.During this process,it achieved the forced release mainly through the plastic deformation of the safety ring.The thickness and toughness of ring played a key role during this process.In addition,the base and the locking hook would appear certain deformation too,but their stiffness could meet the design requirements.Through the study,the paper revealed the mechanical force and deformation and dynamic response of various components in typical condition in the processes of normal release and forced release.The safety and feasibility of the gas release locking mechanism is demonstrated,and it provided an important reference for the structural design of the locking mechanism of the rocket weapon.