Study on Refitting of Hydraulic Hatch Cover

Due to the discontinuous structure of hatch cover and multiple loads, deck structural instability is prone to occur in hatch cover position. Taking the modification of hydraulic hatch cover of a buoy tender as an example, this paper focuses on several key technologies involved in the modification of hatch cover, including the adjustment of weight and gravity center of ship in ballast after modification, structure design and strength check of hatch cover. The stress, deformation and buckling strength of hatch cover structure under corresponding load conditions are analyzed by finite element method.