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Title: An Investigation of Passive and Semi-Active Tuned Mass Dampers for a Tension Leg Platform Floating Offshore Wind Turbine in ULS Conditions

Abstract

Offshore Wind Turbines (OWTs) are subjected to complex external loadings caused by combined wind and wave sources. The application of structural damping control techniques to OWTs using Tuned Mass Dampers (TMDs) has shown to be effective in reducing the integrated system loads and accelerations. In this work, the impact of passive and semi-active (S-A) TMD’s applied to both fixed-bottom (monopile) and floating (tension leg platform) OWTs are evaluated under the Fatigue Limit State (FLS) and Ultimate Limit State (ULS). Different S-A control logics like ON/OFF state damping based on the ground hook (GH) control policy are implemented, and the frequency response of each algorithm is investigated. It is shown that the performance of each algorithm varies according to the load conditions such as FLS (normal operation) and ULS (idling state). Fully-coupled time domain simulations are conducted through the developed simulation tool for structural control integrated into the high-fidelity wind turbine design code, FASTv8. Compared to the passive TMD, it is shown that a S-A TMD results in higher load reductions, as well as, smaller strokes under both FLS and ULS conditions. In FLS analysis, the S-A TMD using Displacement Based Ground Hook (DB-GH) control is capable of reducing the fore-aftmore » and side-to-side damage equivalent loads for the monopile substructure by approximately 12 % and 64 %, respectively. The ultimate loads at the tower base for the floating substructure (TLP) are also reduced by 9% with S-A TMD followed by Inverse Velocity Based Ground Hook control (IVB-GH). The dynamic characteristics and practical feasibility of a magnetorheological (MR) damper (for S-A control) are also evaluated.« less

Authors:
 [1];  [1];  [2];  [3];  [1]
  1. Univ. of Massachusetts, Amherst, MA (United States)
  2. GLOSTEN, Seattle, WA (United States)
  3. GE Renewable Energy, Richmond, VA (United States)
Publication Date:
Research Org.:
Alstom Renewable US LLC, Englewood, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4WE)
OSTI Identifier:
1461949
Grant/Contract Number:  
EE0005494
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Wind Energy Journal
Additional Journal Information:
Journal Name: Wind Energy Journal
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 42 ENGINEERING; Offshore Wind Turbines; structural damping control techniques; Tuned Mass Dampers; TMDs, passive; semi-active; fixed-bottom; monopile; floating; tension leg platform; Fatigue Limit State; FLS; Ultimate Limit State; ULS

Citation Formats

Park, Semyung, Lackner, Matthew A., Cross-Whiter, John, Tsouroukdissian, A. Rodriguez, and La Cava, William. An Investigation of Passive and Semi-Active Tuned Mass Dampers for a Tension Leg Platform Floating Offshore Wind Turbine in ULS Conditions. United States: N. p., 2016. Web. doi:10.1115/OMAE2016-54332.
Park, Semyung, Lackner, Matthew A., Cross-Whiter, John, Tsouroukdissian, A. Rodriguez, & La Cava, William. An Investigation of Passive and Semi-Active Tuned Mass Dampers for a Tension Leg Platform Floating Offshore Wind Turbine in ULS Conditions. United States. doi:10.1115/OMAE2016-54332.
Park, Semyung, Lackner, Matthew A., Cross-Whiter, John, Tsouroukdissian, A. Rodriguez, and La Cava, William. Sun . "An Investigation of Passive and Semi-Active Tuned Mass Dampers for a Tension Leg Platform Floating Offshore Wind Turbine in ULS Conditions". United States. doi:10.1115/OMAE2016-54332. https://www.osti.gov/servlets/purl/1461949.
@article{osti_1461949,
title = {An Investigation of Passive and Semi-Active Tuned Mass Dampers for a Tension Leg Platform Floating Offshore Wind Turbine in ULS Conditions},
author = {Park, Semyung and Lackner, Matthew A. and Cross-Whiter, John and Tsouroukdissian, A. Rodriguez and La Cava, William},
abstractNote = {Offshore Wind Turbines (OWTs) are subjected to complex external loadings caused by combined wind and wave sources. The application of structural damping control techniques to OWTs using Tuned Mass Dampers (TMDs) has shown to be effective in reducing the integrated system loads and accelerations. In this work, the impact of passive and semi-active (S-A) TMD’s applied to both fixed-bottom (monopile) and floating (tension leg platform) OWTs are evaluated under the Fatigue Limit State (FLS) and Ultimate Limit State (ULS). Different S-A control logics like ON/OFF state damping based on the ground hook (GH) control policy are implemented, and the frequency response of each algorithm is investigated. It is shown that the performance of each algorithm varies according to the load conditions such as FLS (normal operation) and ULS (idling state). Fully-coupled time domain simulations are conducted through the developed simulation tool for structural control integrated into the high-fidelity wind turbine design code, FASTv8. Compared to the passive TMD, it is shown that a S-A TMD results in higher load reductions, as well as, smaller strokes under both FLS and ULS conditions. In FLS analysis, the S-A TMD using Displacement Based Ground Hook (DB-GH) control is capable of reducing the fore-aft and side-to-side damage equivalent loads for the monopile substructure by approximately 12 % and 64 %, respectively. The ultimate loads at the tower base for the floating substructure (TLP) are also reduced by 9% with S-A TMD followed by Inverse Velocity Based Ground Hook control (IVB-GH). The dynamic characteristics and practical feasibility of a magnetorheological (MR) damper (for S-A control) are also evaluated.},
doi = {10.1115/OMAE2016-54332},
journal = {Wind Energy Journal},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {6}
}

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