A plate type variable friction damper is proposed in order to make the damping devices have complex damping characteristics. Based on static equilibrium conditions, the theoretical formulas of damper hysteretic model according to its geometric and physical parameters were derived. And the damper hysteretic curve was simulated using nonlinear finite element analysis. Some periodic static test on hysteretic behavior of the damper was conducted. The key parameters affecting the hysteresis performance based on the above methods were investigated. The results showed that hysteresis curves of the damper are symmetrical triangle about the origin and locate in first and third quadrants, Hysteresis curve of theoretical formulas and numerical simulation agreed very well with the experimental results, the key factors affecting the damper hysteretic performance are spring stiffness, two friction coefficients and one angle. It showed that the damper hysteresis curve has obviously complex damping characteristics, the results of theoretical formulas and numerical simulation of the hysteretic model can be used as a preliminary method to design this damper.
Key words
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complex damping；variable friction damper；theoretical formula；performance test；numerical simulation
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