Finite Element Damping Simulation of Viscous Damper for Simply Supported Beam Vibration Mitigation

Abstract

Abstract Aiming at the issue of vibration mitigation of viscous damper, the FE simulation of the velocity dependent damper is studied. Based on the analysis of composition and mechanical performance of the damper, the key equation and parameters are identified and analyzed firstly. Thus according to the software regulations, two different element types COMBIN14 and COMBIN37 are selected to verify their damping characteristics. Adopting the commonly used simply supported beam as investigation object, the FE model is established and compared. Results show that COMBIN14 can only simulate the behavior of linear damper, while COMBIN37 has the capacity of simulating nonlinear damper. The related force-velocity equation and parameters can be achieved indirectly by modifying the element settings. And the damping effect with the change of different parameters is discussed. The results show that the attenuation effect of vibration has a positive correlation with damping coefficient C and a negative correlation with exponent α in a certain range.