A Nonlinear Stiffness Design Method for Rubber Components Based on Equal Frequency Damping
Based on the nonlinear stiffness curve,a stiffness design method characterizing equal frequency vibration reduction was proposed for a saddle-shaped rubber component with various load conditions but the same vibration isolation requirement.A set of hyper-elastic principal curves charac-terizing the maximum strain history effect of rubber and constitutive parameters of hyper-elastic and Mullins effect were constructed virtually.By using ABAQUS software,the stiffness characteristic curve of the saddle rubber components was calculated,and the stiffness curves of the loading were fit-ted with equal frequency respectively,and the vibration isolation effect was verified by experiments.The results showed that,in the loading stage,the vibration isolation effect was almost identical,the maximum difference of equal frequency was 4.3％,the difference of vibration isolation effect was 9.1％,which indicated that the loading stage had a good equal frequency vibration reduction ability,which provided a new idea for the design of nonlinear rubber vibration reduction elements.
saddle type rubber componentequal frequency vibration reductionnonlinear stiffness
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