Research on the effect of large passenger ship opening on hull girder bearing capacity and deflection
Large-span open beams of large passenger ships are susceptible to plastic hinge failure mode at the opening edges under axial and transverse loads,leading to a reduction in the overall structural load carrying capacity,which needs to be analyzed accordingly for the open beam structure.A series of numerical simulations as well as practical tests were carried out on the large-span open-ended beams,the factors affecting the shape of the openings.The analysis results show that the nonlinear finite element numerical simulation results of the nodal structure are consistent with the test results,and the in-crease in the size of the openings leads to a stronger localized plastic hinge damage phenomenon,and under the combined ef-fect of axial and pendant loads,the axial loads have a smaller effect on the ultimate load carrying capacity of the structure,but affect the structure to enter into the plastic phase earlier.At the same time,the deflection of the open hole beam and the relationship between the shape of the open hole and the external load are analyzed,and the corresponding numerical simula-tion analysis is carried out for the influence parameters of the open hole beam,which will provide a reference for the large-span open hole structure of large passenger ships.
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