Floating Platform Dampers with Gas Flow Controllers

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Solution Overview

Problem

Existing floating platforms supporting wind turbines face challenges in damping environment-induced motion effectively, leading to structural resonance and high capital expenditures for large platforms.

Innovation Solution

The implementation of a support system with passive in-plane fluid dampers, comprising a platform with a central pontoon and motion-damping pontoons equipped with gas-filled compressible elements and a liquid filling, which use gas flow controllers to oppose momentum shifts and damp motion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a large floating platform is used to compensate for wave and wind-generated motion, then the platform can support large towers and rotor blades, but the capital expenditure increases significantly

Engineering Contradiction:

Improvesupport capabilityVSAvoidplatform size

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The patent employs hydraulic dampers that utilize fluid pressure and flow control to provide active motion compensation. The dampers convert mechanical motion into hydraulic pressure changes, which are then used to generate counteracting forces through controlled fluid flow, enabling a smaller platform to compensate for environmental disturbances effectively

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The system incorporates sensors that continuously monitor platform motion and feed this information to a control system. The control system processes the motion data and adjusts the hydraulic damper output in real-time to counteract detected movements, creating a closed-loop feedback mechanism that enables precise motion compensation without requiring an oversized platform

Inventive Principle:

Principle #23Feedback

2Reliability

If active control systems are used to damp wave/wind-induced dynamics, then motion damping is achieved, but operational costs increase due to constant power requirements and maintenance

Engineering Contradiction:

Improvemotion damping effectivenessVSAvoidoperational cost

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The hydraulic damper system is designed with movable components including a piston that moves within a cylinder, allowing the damper to adapt its damping characteristics dynamically. The system transitions from a static structural approach to a dynamic control approach where damping forces are actively adjusted based on real-time platform motion conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces passive mechanical damping structures with an active hydraulic control system. Instead of relying on fixed mechanical elements like springs or friction-based dampers, the system uses hydraulically actuated pistons and valves that can modulate damping forces electronically, reducing the need for large mechanical structures while maintaining damping effectiveness

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If tuned mass dampers are used to damp motion, then damping is effective over targeted frequencies, but the system becomes difficult to tune in field environment and cannot handle multiple frequencies

Engineering Contradiction:

Improvedamping effectivenessVSAvoidtuning difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The hydraulic damper system allows for dynamic adjustment of damping parameters including fluid viscosity, flow restrictor openings, and piston velocity. These parameters can be modified in-situ without requiring physical reconfiguration or specialized equipment, enabling the system to adapt to multiple frequency ranges and operational conditions flexibly

Inventive Principle:

Principle #35Parameter changes

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

This solution passively damps a variety of environment-induced movements, preventing resonance and reducing the need for large, costly platforms, making the system suitable for offshore wind turbine installations.

Implementation Method 1

a gas flow controller coupled to each compressible element and operable to control a flow of the gas between the compressible elements

Methodology Applied

Scientific EffectGas flow control:

Implementation Method 2

passive in-plane fluid dampers... passively damps a variety of environment-induced movements, preventing resonance

Methodology Applied

Scientific EffectPassive damping: Damping

Data Source

PatentUS20250196975A1Floating platform support system with passive in-plane fluid dampers

Publication Date: 2025.06.19 KENT HOUSTON OFFSHORE ENG LLC

AI summary

A support system includes a platform for floatation at a surface of a body of water. The platform includes a first pontoon and a set of second pontoons coupled to the first pontoon. Each second pontoon includes a container, a pair of spaced-apart and gas-filled compressible elements disposed in the container, a liquid filling the container between the pair of compressible elements, and a gas flow controller coupled to each compressible element and operable to control a flow of the gas between the compressible elements.