Abstract: A multi-medium coupling shock absorber is designed by ingeniously coupling the air, oil, rubber and metallic elastic component to meet the requirement of resisting violent impact and attenuating vibration in the vibration-impact-safety device of electronic-information equipment. The model machine shows strong nonlinear dynamic characteristics in the multi-parameter coupling dynamic test. Based on this, the nonlinear dynamic characteristics model is established by combining the theoretical analysis and the actual structural parameters applied in modeling. The analytic result shows that the multi-medium coupling shock absorber has a good dynamic performance and controllable design-capability. The modeling method is applicable to the research and design of other shock absorbers

Key words: complex modeling, multi-medium coupling shock absorber, nonlinear dynamic characteristics