Dynamic Stiffness of Rubber Mount at High Frequencies Under Preloads
In order to enhance the calculation accuracy of high-frequency dynamic stiffness for rubber mounts,a method estimating dynamic stiffness of rubber mounts under various preloads at high frequencies is presented.Firstly,the dynamic stiffness and loss angle of rubber specimens under various pre-shear strains are measured.The viscoelastic parameters of rubber in the frequency domain under various pre-strains are identified based on the experimental data.Secondly,a finite element model for estimating the dynamic stiffness of a rubber mount is proposed.Elements in the finite element model are grouped according to the octahedral shear strain under pre-load,with associated viscoelastic parameters input for each group.Based on the proposed method,the dynamic stiffness of a rubber mount is calculated.The dynamic characteristics of the rubber mount under various preloads are measured.Comparisons between calculated and measured dynamic stiffness show that the relative error of calculation to experiment is less than 10％.
dynamic stiffnessviscoelasticityfinite element methodrubber mountspreload
NETL
NSTL
万方数据
