Kinetic Energy Shells Simulated Launcher Pitch Frame Structure Design And Finite Element Simulation Analysis

Kinetic energy elastic launch system is a complex institutions,it is often designed by the experience of the designer.Therefore the kinetic elastic launch system will inevitably experience the process of "design-production-experiment ”.However,sometimes it is very wasteful to use the entire launch system for live-fire test when we do experimental data collection for some parts.Therefore,it is very necessary to design a kind of kinetic simulation launchers,and we can test through installing the key components on the simulator so as to get experimental data for the part.When the kinetic energy missile is launched,the whole system will be affected by a variety of load.Based on the study and design of kinetic energy of elastic launch system both at home and abroad,in this paper we regard the launching simulator as the research object,and do special design and optimization to it.The optimized pitch plane not only accord with the requirement of experiment of stiffness and strength,but also on the quality of the preliminary design is down by 19%.According to the requirement of the technical indicators and the design experience,firstly we analysis the connection relationship of the kinetic energy elastic launch system and the stress distribution in the work process,then put it on the launching simulator equivalently to build the three-dimensional model of the analog device;On this basis,according to the size of the load and boundary conditions,we do statics analysis,modal analysis and nonlinear dynamic analysis using the finite element analysis software on the pitch plane.The analysis results show that the preliminary design of the pitch plane is comply with the design requirements.Secondly,we use OptiStruct optimization software,with longitudinal displacement of frame size as constraints,with the smallest turned into the optimization goal,cell density as design variables,to do the topology optimization analysis on the pitch plane,then we obtain the optimal distribution of material density contours,and we do anti-design to the pitch plane using the density contours,so finally we get the optimized pitch.Finally,in order to test the optimized pitch frame if still meet the design requirements,we carry out finite element analysis once again to the optimized pitch.Analysis results show that on the premise of stiffness and strength meet the requirements he optimized pitch,the overall quality was down 19% from the original design,which proves the rationality,feasibility and correctness of the optimization design.The above results also provides design train of thought for analog device of other parts design and structural optimization design.