Vibration Simulation Of Intelligent Composite Bridge Pier Bearing System

Earthquake, wind, vehicles and other random loads acting on the bridge, will cause the vibration of the bridge. The safety and normal use of the bridge is disadvantageous to the safety and the normal use of the bridge. Therefore, the designers should take full consideration of the vibration of the bridge when designing the bridge. Vibration control is mainly divided into passive control, active control, semi-active control, hybrid control and intelligent control.Magnetorheological elastomer(MRE) as a variable stiffness and variable damping of smart materials in recent years by the widespread concern, in the field of civil engineering structure vibration, the magnetorheological elastomer vibration isolator as a new type of vibration isolator, can replace the traditional rubber bearing, the traditional is control for intelligent control.In this paper, a simple bridge model of MRE vibration isolation bearing is built as the research object, and the dynamic response of the bridge system is analyzed and calculated, which provides the basis for verifying the rationality of the experimental model. The dynamic simulation model of MRE vibration isolation bearing bridge is established with the CAE pre-processing software ANSA, and the MRE three-dimensional vibration isolation bearing is simulated with the spring element with stiffness and damping. The modal analysis of MRE vibration isolation bearing bridge system is carried out by using LS-DYNA, and the main modes of the bridge system are obtained. LS-DYNA of MRE isolation vibration of bridge bearing system response has been analyzed, including the response to impact load and response to harmonic excitation.Through the bridge system vibration simulation research, this paper compares the MRE under different excitation vibration isolator in different stiffness and damping on the vibration isolation effect of the bridge system, indicating that the use of MRE isolator has good damping effect, which verified the rationality of laboratory built a simple bridge system model.