Strength Assessment Of Floating Power Flow Catamaran

The exploitation of ocean energy is increasingly urgent.The tidal current energy,because of its high energy density,high predictability,little influence to the environment etc.has appealed tons of attention of researchers.The development of tidal energy needs the appropriate carrier.Catamaran carrieras a kind of high performance with large deck area,has the advantages of good stability,good wavekeeping etc.In recent years has been in the ocean energy development has been more widely used.Though Catamaran carrieris increasingly widely used,but its yield strength and fatigue strength is not strong enough.At present the main research object of the classification societies of the world is a large ship or offshore platform,with a clear way to calculate wave load acting on the catamaran carrierand check the strength of it,but these specifications do not apply to dual body vectors so it is necessary to study the catamaran its yield strength and fatigue strength.In this paper,the catamaran carrieras a carrier of a certain power generation is investigated.Firstly,building finite element model with the FEM software MSC/patran,after that the catamaran carrieris performed using Sesam software to analyze the hydrodynamic performance to calculate the stress and deformation of each zone of the ship structure under the combined action of the maximum wave load and the hydraulic turbine load and so on;secondly calculating and analysing the stress and strain of the vessel to determine the structure of the vector in high stress area with the CCS "swath guide",the yield strength of the vector was checked,and detaily discussing the influence of carrier hull deformation on the yield strength of the ship hull deformation in the CSQS specification range;finally,according to the calculation results of the high stress region,Considering the effect of hydraulic turbine loading,with deterministic methods and reliability methods based on spectral analysis to cumulative damage criterion on the fatigue strength of the vector was evaluated.