Theory and Model Test Research of Cable Lever Mass Damper

PDF(1964 KB)

Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (13) : 17-22.

论文

Theory and Model Test Research of Cable Lever Mass Damper

WANG Bo1,2,3, WANG Zheng-xing1,2

Author information +

History +

Abstract

In order to solve the cable vibration problems for span increase of cable-stayed bridge, lever mass damper (LMD) on cable vibration reduction is put forward. The structure characteristics and mechanism of action of LMD is introduced, cable-LMD system vibration equations are established, the LMD equivalent damping force model and the LMD and cable various modal mass ratio are deduced, and the first 15 modes of the cable logarithmic decay rate are researched through the theoretical calculation and model test. The results show that: due to inertia, stiffness and damping of these three feedback function, at the same time as the adjusting lever amplification effect, and the damping effect of LMD is better than the same installation height of the viscous shearing damper. Because of the better bridge landscape effect, installation and maintenance, LMD provides a reliable solution for the vibration control of stayed cable of a cable-stayed bridge with thousand-meter scale span.