Experiment and numerical simulation on the damping performance of a new type of tubular friction variable damper
PENG ling-yun1, 2, ZHOU xi-yuan1, 2, Yan Wei-ming1, 2
1. Beijing Key Lab of Earthquake Engineering and Structural Retrofit，Beijing University of Technology, Beijing 100124;2. The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology. Beijing 100124
Abstract：A tubular friction variable damper with variable stiffness characteristics is presented herein. The damper is consisted of a sleeve cylinder and a inner friction ring. The inside diameter of the sleeve cylinder is slightly smaller than the outer diameter of the inner friction ring. When the friction ring is inserted into the sleeve and moves back and forth the assembly stress will arise. The friction variable function is realized cutting slots in the axial direction, breaking the wall in the middle part of the sleeve cycle where the inner ring is initially placed, thus the confined stress of the sleeve cylinder applied on friction ring is approximately zero in initial state of the damper. If the friction ring moves around, the friction damping force will generate accordingly. The study in this paper illustrates that the structure equipped with the variable friction dampers has the characteristics of active variable stiffness: When the structure departs away from the equilibrium position, the damper provides greater friction force as increasing relative displacement between sleeve cylinder and inner ring; in other hand, when the structure back to the equilibrium position the damper provides gradually decreasing friction force. The damping performance test and finite element analysis simulate on the damper shows that the damper can achieve the damping performance of the active variable stiffness control which needs supports from computer and servo feedback device. The proposed damper possesses the merits of simple structure and large output force, which is conducive to its extensive applicability in various structural and mechanical engineering projects, Hence, the application prospect of this damper iswould be expected to be high .
彭凌云;;周锡元;;闫维明;. 管式变摩擦阻尼器的减振性能试验与数值模拟[J]. , 2012, 31(5): 12-16,2.
PENG ling-yun;;ZHOU xi-yuan;;Yan Wei-ming;. Experiment and numerical simulation on the damping performance of a new type of tubular friction variable damper. , 2012, 31(5): 12-16,2.
2012, Vol. 31 
