Project Outline

This research project aims to develop a proprietary floating substructure design technology that simultaneously satisfies motion performance and structural safety for floating offshore wind systems. 

A hybrid floating substructure composed of concrete-steel composite structures is considered, and integrated load analysis is performed to evaluate structural responses considered, and integrated load analysis is performed to evaluate structural responses and develop structural designs.

Technical Features of the Technology Development

Integrated Load Analysis–Based Design Technology for Floating Offshore Wind Systems

This project applies integrated load analysis (ILA) to the entire floating wind system, including the wind turbine, floating substructure, and mooring system. By considering the coupled effects of wind loads, wave loads current loads, and structural responses, realistic offshore environmental conditions are reflected, enabling accurate load estimation and structural strength assessment. 

This approach ensures the structural integrity and design reliability of the floating substructure.

Structural Design and Analysis of Hybrid Floating substructures

Considering the characteristics of hybrid floating substructures composed of concrete and steel, element-specific design criteria are established. 

Structural configurations and dimensions of major components are optimized through the evaluation of structural loads and stresses, resulting in a floating substructure design that satisfies both structural safety and fabrication economy.

Structural Safety Assessment of the Floating Substructure 

Based on time-domain analysis result, structural strength assessments under Ultimate Limit State (ULS) and Fatigue Limit State (FLS) conditions are conducted. Structural responses and fatigue damage of critical sections are quantitatively evaluated to verify the long-term structural safety of the floating substructure.

Design Optimization and Class Approval Integration

Design optimization of the floating substructure geometry and major components is performed based on analysis results obtained at each design stage.
Design reports and drawings compliant with DNV class requirements are prepared, and Approval in Principle (AIP) is considered to establish a foundation for future demonstration and commercial offshore wind projects.