Development of a 17 WM Offshore Wind Turbine with TLP Foundation

OTL worked on a development of 17WM offshore wind turbine with TLP Foundation for CNOOC Research Institute Ltd. OTL’s scope of work included optimizing the TLP configurations, design of the TLP hull structure, structural strength, and fatigue analysis, covering wind and wave loadings. The analysis and design employ detailed FE method for stress and buckling, and time domain rain-flow counting method for fatigue damage calculation.

Client: CNOOC Research Institute Ltd.

Date of Started:05/2025

Wind Turbine: 17MW

SOW: OTL performed following designs and analyses, and submitted associate reports

·        Configuration optimization of Wind Turbine support structures (three-legged TLP sub-structure)

·        Structural design and analyses

o   Structure design of the TLP hull (plating, girders, stiffeners, brackets, and etc.)

o   In-place global and local strength analysis under critical wind, wave, and current loads

o   Supporting structure buckling check

o   In-place time history global fatigue screening with rain-flow counting method

o   In-place time history local fatigue assessment with rain-flow counting method

Development of a 17.5 WM Offshore Wind Turbine with Semi-Submersible Foundation

OTL worked on the development of 17.5WM offshore wind turbine with Semi-Submersible Foundation for CNOOC Research Institute Ltd. OTL’s scope of work included optimizing the Semi-Submersible configurations, design of the critical connection structure between the wind turbine tower and the Semi-Submersible main column, structural strength, and fatigue analysis, covering wind and wave loadings. The analysis and design employ detailed FE method for stress and buckling, and time domain rain-flow counting method for fatigue damage calculation.

Client: CNOOC Research Institute Ltd.

Date of Started:04/2024

Water Depth:  170 m

Wind Turbine: 17.5MW

SOW: OTL performed following designs and analyses, and submitted associate reports

·        Configuration optimization of Wind Turbine support structures (three-columned Semi-Submersible sub-structure)

·        Structural design and analyses

o   Structure design of the critical connection between the wind turbine tower and the floating Semi-Submersible foundation.

o   In-place strength analysis under critical wind, wave, and current loads

o   Supporting structure buckling check

o   In-place time history local fatigue assessment with rain-flow counting method

Development of a 17 WM Offshore Wind Turbine with Fixed Foundation

OTL worked on a development of 17WM offshore wind turbine with fixed foundation for a confidential client. OTL’s scope of work was designing the critical connection structure between the wind turbine and the jacket foundation, including configuration, structural strength, and fatigue analysis, covering both wind and wave loadings and their interaction. The analysis and design employed detailed FE method for stress and buckling, and time domain rain-flow counting method for fatigue damage calculation.

Client: Confidential

Time of Started:03/2023

Wind Turbine: 17 MW

SOW: OTL performed following designs and analyses, and submitted associate reports

·        Configuration of connection structure between the wind turbine and the jacket foundation

·        Structural design and analyses

o   Design of the critical  connection structure between the wind turbine and the jacket foundation

o   In-place strength analysis under critical wind, wave, and current loads

o   Supporting structure buckling check

o   In-place time history fatigue analysis with rain-flow counting method

Bidding of a Large Offshore Floating Wind Platform

Client: Three Gorges Renewables

SOW and Facts: 

OTL has been invited by Hadian Heavy Industries and team up with CIMC Raffles to jointly bid the EPCI scope of works for the first floating wind platform in China by Three Gorges. OTL is assigned the responsibility of the engineering aspects of the floating wind platform by the consortia.

OTL has performed comprehensive bid engineering up to FEED level for key load conditions including the operating conditions and pre-services conditions, covering the hull scantling, mooring system and cable system. OTL has also assisted the consortia with feasible construction, loadout, transportation and installation planning as well as cost estimate, technical communication and clarification with the client, etc.

Location: China

Development of Combined Floating Wind and Fish Farm

Client: Confidential

SOW and Facts: 

OTL has been requested to developed and preliminarily engineered a floating wind platform that can also serve as a fish farm. Based on OTL’s previous experiences on offshore wind support, oil and gas floating platform and fish farm, OTL has configured a 4-column structure that will not only provide sufficient stability and support for the pre-services and operation of the wind turbine with optimized motion and structural performance, but also has a maximized water body that can serve as fish farm.

Location China: