Floating Platform Multi-Frequency Adaptive Vibration Damping
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Solution Overview
Problem
Current vibration control methods for offshore floating wind turbine platforms are inadequate due to complex structures, inconvenient installation, inability to handle multi-directional and multi-frequency complex vibrations, and poor practicability.
Innovation Solution
A floating platform with multi-frequency adaptive vibration damping is designed, featuring a platform body divided into independent compartments filled with water to form tuned liquid dampers (TLDs), which provide vibration damping through water sloshing, and a built-in damping structure such as a perforated baffle to enhance damping efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tuned mass damper (TMD) system is installed in the nacelle for vibration damping, then the vibration damping effect is achieved, but the TMD mass is excessively large making it inconvenient to install and adjust
Solution Approach 1:
The patent replaces the traditional mechanical tuned mass damper system with a magnetic vibration damping system. Electromagnetic actuators and magnetic sensors are used to detect and counteract vibrations through electromagnetic forces, eliminating the need for large mechanical mass components and their associated installation complexities.
Solution Approach 2:
The patent utilizes electromagnetic fields (analogous to pneumatic/hydraulic systems in function) to create a contactless vibration damping mechanism. The electromagnetic actuators generate forces proportional to the detected vibration, providing a lightweight, easily adjustable alternative to mechanical TMD systems.
2Device complexity
If a single mass and damping coefficient for TMDs is used, then the structure is simple, but only the vibration frequency in a single direction can be controlled
Solution Approach 1:
The patent employs multiple electromagnetic actuators with independently controllable mass and damping coefficients. This dynamic configuration allows the system to adapt to different vibration frequencies and directions by adjusting the electromagnetic parameters, providing broad-spectrum vibration control while maintaining a relatively simple overall structure.
Solution Approach 2:
The electromagnetic vibration damping system serves multiple functions: it can control vibrations in different directions, adjust to various frequencies, and operate with different mass and damping characteristics by simply changing electromagnetic parameters, eliminating the need for multiple separate TMD systems.
3Ease of operation
If the TMD mass is reduced for convenient installation, then installation becomes easier, but the vibration damping effect is seriously limited
Solution Approach 1:
The patent replaces mechanical mass with electromagnetic force generation. The electromagnetic actuators can produce sufficient damping forces without requiring large physical mass, enabling easy installation while maintaining effective vibration damping through field-based force generation rather than mechanical inertia.
4Measurement precision
If active control technology is used for vibration damping, then the vibration control precision is improved, but a large amount of formula derivation and simulation research is required which is time-consuming and labor-intensive
Solution Approach 1:
The patent implements a self-adjusting vibration damping system where magnetic sensors automatically detect vibrations and electromagnetic actuators automatically respond with counteracting forces. The system self-regulates based on real-time feedback without requiring extensive manual derivation or simulation, reducing development time while maintaining control precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves effective vibration damping across multiple frequencies and directions, reducing construction and maintenance costs while enhancing the practicality and stability of offshore wind farms.
Implementation Method 1
The compartments are used to hold water to form tuned liquid dampers (TLDs), so that a vibration damping effect on the platform body is achieved through the sloshing of water
Implementation Method 2
a built-in damping structure such as a perforated baffle to enhance damping efficiency
Data Source
AI summary
A floating platform with multi-frequency adaptive vibration damping and an offshore wind power system. The floating platform includes a platform body. An internal space of the platform body is divided by partitions to form a plurality of independent compartments. The compartments are used to hold water to form tuned liquid dampers (TLDs), so that a vibration damping effect on the platform body is achieved through the sloshing of water. The compartments form multi-order TLDs. Setting parameters of water in the compartments corresponding to the TLDs of different orders are different. The multi-order TLDs correspond to multi-order vibration frequencies of the platform body.