Adaptive suspended liquid mass dual-tuned damper for vibration control of offshore wind turbines

Abstract

The invention discloses an adaptive suspended liquid mass double-tuned damper for vibration control of an offshore fan, which includes at least one group of adaptive hybrid frequency modulation and translational control systems arranged at the maximum amplitude of the controlled vibration type inside the fan tower, an automatic Adapt to the active variable damping torsional vibration control system and control system; the self-adaptive hybrid frequency modulation translational control system includes a primary frequency modulation translational control unit and a secondary frequency modulation translational control unit; the adaptive active variable damping torsional vibration control system includes rotational torsional vibration Control unit and variable damping control unit; the control system is used to collect the real-time vibration state of the fan tower, and control the first-level frequency modulation and translation control unit, the second-level frequency modulation and translation control unit, the rotation torsional vibration control unit and the variable damping control unit. unit is controlled. The invention includes an adaptive hybrid frequency modulation translational control system and an adaptive active variable damping torsional vibration control system, respectively controlling the translational motion and torsional motion of the offshore wind turbine under the coupled action of wind, wave and flow.

Description

technical field [0001] The invention relates to the technical field of marine engineering, and more specifically relates to an adaptive suspended liquid mass double-tuned damper used for vibration control of offshore wind turbines. Background technique [0002] Most of the offshore wind farms currently built use fixed foundations such as large-diameter single piles and suction anchors. After the fixed foundation is completed, the original hydrodynamic field in this area will be changed, causing local scour around the foundation, and the cantilever length of the foundation will increase due to scour. Large, natural vibration frequency decreases, 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 Dangerous, thus affecting the normal operation of the fan. In order to reduce the impa...

AI Technical Summary

Problems solved by technology

It is simple and easy to set up the TLD system in 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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