Concept Design And Hydrodynamic Calculation For Assembled Frame Of Very Large Floating Structure

Very Large Floating Structure technology(VLFS) has been investigated for years by developed countries to expand deep-sea exploration as a potential engineering technology. China has done some research on this subject also but need delve into futher as concerning the incidents in the East and South China seas.Based on the state-of-art about VLFS worldwide, the frame-type unit which ia easy to assembly VLFS is put forward in the present work when considering the dual-use demands and employing the advanced. UHPC(Ultra High Performance Concrete)—steel composite technology, The conceptual design for frame-type floating body component is figured out according to the Det norske Veritas criterion, The corresponding hydrodynamic response is calculated and its life expectancy is predicted.The hydrodynamic response, the static stability and dynamic response of mooring tension response are analyzed, for the component, and compared with the Mobil Offshore Base(MOB) put forward by European and American developed countries, using the finite element AQWA software.The calculated results show that when under the once-in-a-century sea state condition, the Sway, Surge, Roll, or Pitch of frame type floating body monomer is rather low about 15%,27%,5%,30% than that of MOB body monomer, an when under the once-in-a-year sea state condition, index mentioned before is rather low about 45%,53%,9.8%,17% than that of MOB, frame type floating body put forward has a much better hydrodynamic response and a more less iterations for recover static balance than MOB doesThe frame type floating body has a better stability since its mooring lineal tension response is 25% less than that of MOB in time domain and frequency domain. And it is satisfied for the coefficient greater than 1.67. in the requirements of API RP 2SK specification.