Polygonal Floating Offshore Structure for Deep-Water Stability
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Solution Overview
Problem
Offshore wind power generation structures face challenges in deep water due to increased size requirements, fatigue failure risks, and high installation costs, limiting their deployment beyond shallow waters.
Innovation Solution
A floating offshore structure with a polygonal shape formed by columns and pontoons, where pontoons have a greater cross-sectional area parallel to sea level, and are connected by braces and dampers, allowing for installation regardless of water depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If fixed type structures are used in deep water, then installation stability is improved, but structure size becomes too large and fatigue failure risk increases
Solution Approach 1:
The patent transitions from static fixed structures to dynamic floating structures that move with environmental loads. The floating structure includes a floating body with mooring lines that allow controlled movement, converting the rigid fixed structure into a flexible system that adapts to wave and current forces, thereby maintaining stability without excessive size in deep water.
Solution Approach 2:
The patent changes the fundamental installation parameter from fixed seabed anchoring to floating on water surface. This parameter change allows the structure to operate in deep water without the size constraints that plague fixed structures, as the floating body derives support from buoyancy rather than requiring massive foundation elements anchored to the seabed.
2Strength
If fixed type structures are used, then structural deformation response to environmental load is improved, but manufacturing and installation cost increases astronomically
Solution Approach 1:
The floating structure uses dynamic response to environmental loads through mooring lines and floating body movement, rather than rigid structural deformation. This reduces the need for expensive, oversized structural components while maintaining adequate strength to withstand storms and waves, thereby reducing manufacturing and installation costs.
3Adaptability or versatility
If floating type structures are used, then adaptability to deep water is improved, but structural stability deteriorates
Solution Approach 1:
The patent uses buoyancy as a counteracting force to gravity, creating a stable floating equilibrium. The floating body's displaced water weight counterbalances the structure's weight, providing inherent stability in deep water without requiring fixed seabed anchoring. This buoyant counterweight mechanism enables deep water adaptability while maintaining structural stability.
Solution Approach 2:
The mooring lines are pre-configured with appropriate tension and length to provide preliminary stabilization before environmental loads act on the structure. This preliminary action ensures the floating structure maintains proper positioning and stability when deployed in deep water, preventing excessive drift or rotation.
4Ease of operation
If pontoons are installed inside polygonal shape formed by columns, then ease of operation is improved, but structural complexity increases
Solution Approach 1:
The patent implements a nested configuration where pontoons are positioned inside the polygonal framework formed by vertical columns. This nesting arrangement integrates multiple structural functions into a compact geometry, where the inner pontoons provide buoyancy and the outer columns provide structural support, creating an operationally efficient design without excessive complexity.
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
Enables stable installation and operation of offshore power generation systems in varying water depths without structural deformation or increased costs, leveraging buoyancy and mooring forces.
Implementation Method 1
the floating type floats on the surface of the water and is subjected to self-weight, buoyancy, environmental load and mooring force
Implementation Method 2
a plurality of dampers, each of the plurality of dampers being connected to each of the pontoons
Data Source
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AI summary
A floating offshore structure of the present disclosure includes: a plurality of columns; and a plurality of pontoons installed at lower ends of the columns, respectively, wherein a polygonal shape is formed by an imaginary line connecting the columns, the pontoons are installed inside the polygonal shape, a cross-sectional area in a direction parallel to sea level of the pontoons is greater than or equal to the cross-sectional area in the direction parallel to the sea level of the columns, and the pontoons may have a shape protruding outward at the lower ends of the columns.