The effect of the TMD on the vibration of an offshore wind turbine considering three soil-pile-interaction models

Abstract

In this paper we propose the use of the power series method and the Newmark-Beta algorithm to study the mitigation by the tuned mass damper (TMD) of an offshore wind turbine(OWT). The monopile of the OWT is taken as slender beam buried in a homogeneous soil while the tower is considered as tapered slender beam. Mathematically, both monopile and tower are modeled as elastic Euler-Bernoulli beams, with a point mass at the tower top representing the rotor nacelle assembly (RNA). First of all, the power series method is utilized to calculate the first natural frequencies of AF and CS models. The obtained results are compared with the first natural frequency of DS model obtained from FEM-Abaqus with good satisfaction. Next, the obtained mode shapes are used to establish the system of ordinary differential equations (ODE) governing the dynamic of OWT subjected to a TMD. Afterwards, the Newmark-Beta algorithm is employed to solve the ODE. Accuracy of the introduced approach is verified by setting a comparison between our results with those obtained using FEM-Abaqus. Finally, the influence of several parameters on the performance of TMD is shown in some plots.

A Rayleigh-Ritz Solution for High Order Natural Frequencies and Eigenmodes of Monopile Supported Offshore Wind Turbines Considering Tapered Towers and Soil Pile Interactions

“…The mudline stiffnesses are determined such that the same mudline displacement ρ and rotation θ are obtained as with the P-y model. [21].…”

Vibration Control of Steel Wind Turbine Tower Using a Novel Tuned Mass Damper Refitted via Inner Platform

“…Te TMD can be divided into two categories according the structural form, including the support TMD installed in nacelle of steel wind turbine [17] and pendulum TMD suspended inside the tower [18]. As for the support TMD, Bin Zhao et al investigated the vibration control performance of a support TMD for steel WTT under wind-wave excitations, and the shaking table test results showed that TMD can efectively weaken the dynamic responses of steel WTT under the wind-wave loads [19].…”