Multiple TMDs control for metal fatigue suppression of wind turbine support structures

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04361
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Meiji University
• Principal Investigator: Tomizawa Tetusuya 明治大学, 理工学部, 専任准教授 (30774773)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 風力発電 / 風力発電設備支持物 / 制振 / TMD / 実測

Outline of Final Research Achievements

In this study, vibration control techniques were developed to reduce member stresses and the degree of fatigue damage to daily vibrations occurring in wind turbine support structures. The results of this research are as follows.
(1) Acceleration sensors were installed in the tower of an existing wind power generation facility to measure the response acceleration at each point of the tower. (2) From the acquired data, the relationship between the wind speed during daily power generation and the vibration level (acceleration) at each point on the tower caused by the wind pressure was clarified. The vibration characteristics of the wind power generation support structures were analysed, and a time history response analysis model was constructed based on the actual measured values. The model was used to verify the vibration reduction effect of TMDs. These results clarify the possibility of utilising TMD control for wind power generation support structures.

Free Research Field

振動制御

Academic Significance and Societal Importance of the Research Achievements

風力発電は再生可能エネルギーとして，急速に普及してきている一方で，経年劣化に伴うと考えられる故障や事故は増加傾向にあることも事実である。
風力発電設備支持物の事故のひとつに，タワーの倒壊やフランジボルトの破断があるが，その原因のひとつとして金属疲労による劣化が考えられている。風力発電設備は発電するためには風を受けて稼働する必要があり，これに伴いタワーは常に振動している状態にあるため，応力振幅や繰返し数が多い。風力発電設備の存在意義である発電により生じる日常的な振動を低減し，金属疲労による劣化をいかに抑制できるかが風力発電設備の構造安全性ならびに長寿命化に寄与するための重要な課題である。