Analysis and Optimization of Vibration Reduction Structure for Bridge Cable Engineering

Due to the particularity of the bridge environment, the high-voltage cable lines laid on the bridge will not only bear the effects of voltage and current, but also bear the effects of mechanical vibration caused by vehicles, strong winds and other factors during operation. Long term mechanical vibration will lead to fatigue damage of cable structure layer, leading to structural deformation, material performance degradation and even cable line failure. Therefore, vibration reduction should be focused on cable lines laid and operated on bridges. In this paper, the mechanical model of bridge cable is built, and the dynamic characteristics of the test calculation model are used to calculate and analyze the vibration reduction characteristics of the bridge cable line under three working conditions of different support spacing, different support stiffness and damping characteristics, as well as the three working conditions of adding damping structure. The research results provide a technical reference for vibration reduction design and operation maintenance of bridge cable lines.