Abstract

Info

Title:: Study on Parameter Optimization of MTMD Applied to Ocean Platform Structure

Author(s):: SHI Yan; SU Rui; TAO Xue; ZHANG Ji-gang; School of Civil Engineering, Fujian University of Technology

Keywords:: offshore platform; vibration control; earthquake; MTMD; parameter optimization

Abstract:: In the light of the problems that tuned mass damper (TMD) only had the effect on a frequency control, and TMD’s mass and volume were large, that was not suitable for application to the offshore platform structure in complex environment.Therefore, authors made full research on the TMD applied in offshore platform, and put forward the use of multiple tuned mass dampers (MTMD) in the offshore platform structure to control the vibration, and analyzed the vibration control effect of the MTMD on the offshore platform structure. The JZ20-2 offshore platform was used as the study object, and several different TMDs were connected in parallel to the offshore platform structure. By inputting three different seismic waves, the displacement and acceleration responses of the offshore platform system with different MTMD were observed. The basic characteristics of MTMD system were studied. The results show that the quality of TMD has a great influence on the offshore platform. On the premise of a known quality factor, damping coefficient of MTMD and the number of TMD have important effects on vibration control of structures, and these parameters exist an optimization problem.