Simulation Research On Anti-impact Mechanical Performance Of Spring-metal Rubber Cushioning Unit

Metal rubber is compressed from metal wire through a special winding and molding process.It has the characteristics of rubber and metal material.Widely used in aerospace,national defense science and technology and other fields.The damping unit made of metal rubber and spring combination has high stiffness and load-bearing capacity,and can withstand high impact loads.In this paper,we study metal rubber as a damping element,combined with rectangular cross-section spiral compression spring as an elastic element to produce a springmetal rubber buffer unit,and conduct static mechanical performance tests and simulation analysis of impact resistance characteristics.The main research work is as follows:Static tests were conducted on the spring-metal-rubber buffer unit to study the effects of loading speed,compression,relative density and other factors on the load carrying capacity and energy dissipation of the spring-metal-rubber buffer,and to obtain the non-linear stiffness,energy dissipation and energy dissipation coefficient with its change law.The COMBI165 unit in ANSYS/LS-DYNA was used to simulate the spring-metal-rubber buffer unit and to identify its parameters.Based on the impact response theory of the linear system,the theoretical calculated values of the acceleration of the impact response of the spring-metal rubber cushion unit are solved by combining the nonlinear characteristics of the spring-metal rubber cushion unit,and the simulated values of the spring-metal rubber cushion unit with a relative density of0.30 are analyzed for errors with the theoretical calculated values to verify the reliability of the simulation model.Finally,the impact simulation of the simulation model using ANSYS/LS-DYNA was conducted to investigate the effect of excitation signal,relative density,and load mass on the impact-resistant mechanical properties of the spring-metal-rubber cushion unit.