Study on Vibration Control of Long Cable with Shape Memory Alloy Damper

摘要

A tension-compression shape memory alloy (SMA) damper is designed in this paper. In order to obtain the characteristic parameters of the SMA damper and the relationship of pre-strain and loading displacement with equivalent stiffness, damping ratio and energy dissipation capacity, an experimental study has been carried out. Then, the Hamilton principle is employed to derive the nonlinear vibration differential equation of SMA-damper-long-cable system, and the accuracy of theoretical derivation is verified by experimental results. Furthermore, the influence of the SMA-damper on the displacement and acceleration of long cable is analyzed under free vibration. Experimental results show that the effect of SMA-damper is distinct, the response of displacement and acceleration of long cable with SMA-damper is reduced effectively, and its vibration dissipation rate can be greatly improved.