Energy research of three-adjacent structures connected by Kelvin-type dampers based on power flow

Abstract

The control effect of a three-adjacent structural system connected by Kelvin-type dampers and its energy transfer and distribution under uncertain and deterministic excitations are investigated in this study. A simplified model of multi-degree-of-freedom mechanics is used for establishing structural equations; the power flow equations of this structural system are derived based on the power flow theory. The influence law of a structural parameter changes on the input power flow when the damper that is not connected is investigated; the damper parameters are optimized using the NSGA-II (Non-dominated Sorting Genetic Algorithm-Ⅱ) algorithm after connecting the dampers, and the damping control effect is evaluated. Next, the variation law of the input power flow of the structure and damper is analyzed with the structure and damper parameters as study variables. These results indicate that an increase in structural stiffness has a positive excitation effect on the seismic performance improvement of the structure; the influence of the structural damping ratio on the input power flow is sufficiently small. The influence of change in damper parameters on the input power flow is closely related to the structural parameter setting. The three-adjacent damping structure system connected to optimal parameter dampers exhibits a good damping performance when the structural parameters are determined.