Semi-Active Control of EIMD-Cable-Stayed Bridge in Wind-Wave-Current Coupled Field
In order to reduce the excessive vibration response of cable-stayed bridges,this paper proposes a semi-active control method based on the the advantages of new electromagnetic inertia mass damper(EIMD).The double tower and double cable plane steel box girder cable-stayed bridge model is taken as an example.Simulation analysis is made to verify the effectiveness of the proposed method with the dynamic response characteristics of the mid span node of the main beam as the control target.The results show that compared to the active control method using linear quadratic regulators,by the semi-active control method,the displacement control vibration rate and the acceleration control vibration rate of the cable-stayed bridge are 77.3%and 64.3%,respectively.The demand of the control system for external energy is reduced,and the damping coefficient is controlled within a reasonable range provided by the new electromagnetic inertial mass damper.Better results are achieved by the control method,which can provide theoretical reference for the system control of cable-stayed bridges in complex environments.
long-span cable-stayed bridgecoupling of wind-wave-currentelectromagnetic inertial mass dampersemi-active control
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