A Penetrating Rocket Fuze Reliability Analysis And Performance Study Of The Cushioning Material

Control system of the fuze using in the penetration-rocket is designed and researched in the thesis. The reliability of the fuze and the methods of reducing the load on the fuze during the process of penetration are studied.First, the development and the importance of the reliability engineering have been studied. As the fuze is success or failure of product, the reliability study is a very important task in the design phase.Second, according to the function of the fuze, the working block diagram of the whole fuze is drawn. The designs of the control, fire and security solution circuits are designed and analyzed. And the theory and the working process of the mechanical part of the fuze, a clock mechanism with runaway escapement, are analyzed.And then, based the analysis, the fault tree with the failure of the penetration fuze as the top event is constructed using the method in the national military standard. The analysis of this failure tree is conducted, and all the reasons causing the failure are found. Finally, the methods which are used to improve the reliability of the penetration fuze are proposed.Depending on the work environment, quality levels and other specific parameters of the electronic components, the reliability of the penetration fuse is predicted using the component counting method and component stress analysis method. The failure rate and the reliability are calculated. The two methods used for improving the fuze's reliability are compared. And the method of increasing the redundancy fuze circuit is the first method chosen to improve the reliability. And then, the reliability of the security system in the fuze is calculated, too.Finally, using the finite element simulation software LS-DYNA, the process of the penetration is simulated, and the loads of the fuze in different buffer environments are obtained. The buffering principle and performance of PTFE and foam Aluminum gaskets are analyzed, and the buffering properties of the PTFE gaskets are tested using Maxi Te hammer.