Abstract：The damping and self-restoring performance were studied for rational design of shape memory alloyfriction vibration isolator by finite element method. The hysteretic energy dissipation and self-recovery performance of vibration-isolating bearings were investigated based on the descriptions of super elasticity of shape memory alloy with piecewise linear constitutive model. The constitutive relations of the model were embedded into the users' material library of ABAQUS software through UMAT interface. The finite element model of shape memory alloy-friction vibration isolation bearing was established. The results show that the damping capacity increases with the increase of friction coefficient and decreases with the increase of SMA stiffness. The relations between the self-recovery performance and the friction efficient and stiffness are the opposite. When the yield displacement of shape memory alloy increases, the self-recovery ability decreases and the damping capacity does not change.

Keyword：shape memory alloy;vibration isolator;hysteresis performance;self-resilience performance;finite element method;