Self-adaptive suspension liquid mass double-tuned damper for offshore wind turbine vibration control

Abstract

The invention discloses a self-adaptive suspension liquid mass double-tuned damper for offshore wind turbine vibration control. The self-adaptive suspension liquid mass double-tuned damper comprises at least one set of self-adaptive hybrid frequency modulation translation control system, a self-adaptive active variable damping torsional vibration control system and a control system which are arranged at the maximum amplitude of a vibration mode controlled in a wind turbine tower, wherein each self-adaptive hybrid frequency modulation translation control system comprises a first-stage frequencymodulation translation control unit and a second-stage frequency modulation translation control unit, the self-adaptive active variable damping torsional vibration control system comprises a rotary torsional vibration control unit and a variable-damping control unit, and the control system is used for collecting the real-time vibration state of the wind turbine tower and controlling the first-stage frequency modulation translation control units, the second-stage frequency modulation translation control units, the rotary torsional vibration control unit and the variable damping control unit. The self-adaptive suspension liquid mass double-tuned damper comprises the self-adaptive hybrid frequency modulation translation control system and the self-adaptive active variable damping torsional vibration control system which are used for controlling translation motion and torsional motion of the offshore wind turbine under the coupling action of wind, waves and flow.

Description

Technical field[0001]The present invention relates to the technical field of ocean engineering, and more specifically, to an adaptive suspension liquid mass double-tuned damper for vibration control of offshore wind turbines.Background technique[0002]At present, the offshore wind farms built mostly use large-diameter single piles, suction anchors and other fixed foundations. After the fixed foundation is completed, the original hydrodynamic field in this area will be changed, causing local scour around the foundation, which will increase the cantilever length of the foundation. Large, the natural vibration frequency is reduced, causing the natural vibration frequency of the fan structure to deviate from the 1P-3P (1P-motor rotation frequency, 3P-fan impeller sweep frequency) frequency band, causing the fan structure to resonate close to the frequency of the exciting force Danger, thereby affecting the normal operation of the fan. In order to reduce the impact of wind turbine vibrati...

AI Technical Summary

Problems solved by technology

It is simple and easy to set up the TLD system on the structure, and the maintenance cost is low, but the tuning frequency of the TLD system is single, and the working state of the device cannot be adjusted in real time according to the actual vibration response of the structure, which may easily cause control failure

[0004] In addition, the current TMD and TLD systems mainly control the translational motion of the structure, but are ineffective in controlling the torsional motion. Offshore wind turbines will experience torsional vibration under the coupled action of wind, waves, and flow. When the torsional angle exceeds the limit specified in the code value, it will affect the normal operation of the fan

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