The Analysis Vibration Of Thin-wall Ship Hull With Hatch Opening Under The Load Of Crosswise Component

The thin-walled structure is a very popular structure type. This covers ship,building and bridge, ect. Usually, it is composed of sheet metal, shell, thin-walled. Satisfied the needs of strength, its weight is lighter, strength is greater, the material could be more efficiently used in comparison with the other structure. So the thin-walled structure is widely used in engineering structure.Now Some modern ship, such as containership, is used in the form of the thin-walled and characterized by wide hatch openings. These characteristic results in poor torsional rigidity of the hull girder-afact that has caused serious problems of many ships which can not be neglected, especially the coupled vibration of torsion-bending of the ship hull girder.The alternatives to beam analysis of the hull are finite element analysis. However, the expense involved in the use of these methods considerably restricts their use. So apply the beam theory to analysis the vibration. The analysis procedure is based on the solution of a set of coupled differential equations which describe the behavior of thin-wall beams, and calculate the frequency of the ship hull at last.This paper presents the theory of analyzing horizontal-torsion-coupled dynamic behavior of a ship hull with large hatch opening. Based on this theory and by the transfer matrix method to analysis thin-walled hull' vibration under the effects of shear deformation. The numerical results are compared with the results of Ansys.