Polygonal Floating Offshore Structure for Deep-Water Load Stability
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Solution Overview
Problem
Offshore wind power generation systems face challenges in deep water due to structural limitations and increased costs, as fixed structures become impractical and floating systems need to address varying environmental loads and water depth.
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
1Ease of operation
If fixed structures are used for offshore wind power generation, then installation is straightforward in shallow water, but the structure size becomes too large and fatigue failure risk increases in deep water
Solution Approach 1:
The structure is divided into multiple independent columns (first column, second column, third column) connected by braces, forming a modular platform. This segmentation allows each column to independently handle environmental loads, reducing the fatigue failure risk of individual components while maintaining overall structural integrity in deep water installations
2Productivity
If fixed structures are used for large-scale wind power generation, then power generation capacity increases, but manufacturing and installation costs increase astronomically
Solution Approach 1:
The wind farm is divided into multiple floating platforms, each with its own columns and pontoons. This modular approach enables standardized manufacturing of smaller, more cost-effective units that can be assembled and deployed incrementally, reducing overall manufacturing and installation costs while achieving large-scale power generation capacity
Solution Approach 2:
The structure transitions from fixed to floating, allowing dynamic movement with waves and currents. This reduces the need for overly robust (and expensive) fixed foundations, enabling cost-effective deployment in deep water locations suitable for large-scale wind farms
3Adaptability or versatility
If floating structures are used for deep water installation, then water depth limitation is removed, but structural integrity under environmental loads becomes challenging
Solution Approach 1:
Multiple columns are merged into a single floating platform structure through brace connections, creating a unified system that distributes environmental loads across all columns. This combined structure maintains integrity under wave, wind, and current loads while adapting to various water depths
Solution Approach 2:
The structure combines different materials (steel columns, concrete pontoons, composite braces) to optimize strength-to-weight ratio and corrosion resistance, ensuring structural integrity in the harsh offshore environment while maintaining buoyancy and flexibility for deep water deployment
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 structure enables stable and efficient power generation in deep water by maintaining structural integrity and reducing installation 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 connected to the respective pontoons
Data Source
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.