Theoretical And Experimental Research On Metal Rubber Element Anti-Shock Performance

The research on anti-shock of Metal Rubber (MR) component is one of the most important research fields about MR technology. For MR material has many features such as wide-range work temperature, erosion-resistance, strong carrying capacity, radiation endurance, vacuum endurance, large coefficient of energy dissipation, quality stability and structure designable, MR components are widely applied in the field of vibration reduce with damping and shock resistance and also have some super merits under serious circumstance for aviation and space technology. In this paper, the anti-shock property of MR has been displayed and further theory and experiment research has been done on this shock resistance property.Deep research task is also performed on the nonlinear damping cushion system in this thesis. According to the characteristics of MR components, hard stiffness sleeve-like isolator and soft stiffness bell-like isolator were chosen as the plant. The way that response of dry friction damping cushion system is inspected by initial load curves and hysteresis has been raised for the first time. Theoretic analysis and calculation methods of dry fiction damping system under asymmetric and symmetric hysteresis loop as well as theoretic analysis methods of mass pre-deformation in the dry fiction damping system were studied. That how mass, shock acceleration and shock time affect the maximal response displacement and acceleration is researched. By virtue of the loading curve and hysteresis loop of MR components, Matlab program was written for computing maximal response displacement and acceleration.In order to satisfy the analysis and calculation, static experiment was performed on two different isolators with different parameters. Shock experiment on sleeve-like and bell-like isolators was also carried out under different structure parameters, mass, shock acceleration and shock time. The effect of different structure parameters, mass, shock acceleration and shock time was obtained. The error between theoretic calculation and experiment result was analyzed and the design methods of MR isolator are invented by linear model and energy absorption coefficients.