Study on reducing vibration characteristics of b-g platform damper using micro-slip model
HE Shang-Wen1; REN Xing-Min1; QIN Wei-Yang1; DENG Wang-Qun2
1.School of Mechanics and Civil. & Architecture, Northwestern Polytechnical University, Xi′an 710072, China;2. China Aviation Dynamical Machinery Research Institute, Zhuzhou 412002, China
Abstract： Elastic shear layer is introduced into friction surface to simulate dry friction contact. Considering that dry friction surface may pass through three phases as fully viscosity, partial slip, and gross slip during the vibration, an improved micro-slip model is presented. By employing this model, hysteresis curve of friction-to-displacement is obtained, the results agree well with practical data. The friction distribution on friction surface is analyzed under various external forces, and the real condition of micro-slip model is revealed. Further more, by using method of equivalent linearization associated with first order harmonic balance method (HBM), influences of multiple parameters on the equivalent stiffness and damping, and characteristics of reducing vibration of the dry friction damper are studied. Conclusions drawn from the analyses of the simulations above will be helpful for design of B-G platform damper.
2012, Vol. 31 
