Cable vibration control with a TMD-MR damper system

摘要

An apparatus and method to enhance the overall performance of vibration dampers by adjusting the damping and stiffness in the damper for flexible members (e.g., stay cables, cable-stayed bridges, suspension bridges, power lines, and signal posts) experiencing excessive fluctuating vibration in any direction is disclosed. In a preferred embodiment, the apparatus comprises a second structural member, first structural member, springs, and one or more magnetorheological (MR) damper. The second structural member anchors the flexible member and transfers vibration energy to the variable damper(s) and first structural member. The springs provide elastic stiffness for the damper. The MR damper(s) allows for the controllably adjustable, absorption and dissipation of vibration energy in the flexible member by adjusting the damping and stiffening in the damper to a level such that the vibration frequency of the first structural member is about the same as that of the flexible member.