New Semi-Submersible Model Test with SANY

OffshoreTech LLC and SANY collaboratively carried out model tests on the newly developed Tapered-Column Deep Draft Semi-Submersible (TCDD-Semi) platform concept design in State Key Laboratory of Ocean Engineering at Shanghai Jiaotong University. A series of tests are being conducted to demonstrate the platform's performance in various design environment conditions. The testing facility utilized is the deep water offshore basin, which can simulate ocean waves, currents, and offshore winds.

The test programs include the following in regular waves, white noise waves, and random wave conditions: 

  • dipping test
  • static inclination test
  • decay test
  • load excursion test
  • station keeping test

The TCDD-Semi is a new design concept jointly developed by OTL and SANY for dry-tree service. It features, among other items, longer hull geometry with a gradually varying column cross section and skirt plates fitted on the pontoons. These creative aspects contribute to significantly better heave motion responses in waves, pre-service stability, vortex-induced motions (VIM), etc.