Simplified incremental iteration method for calculating ultimate strength of luxurious cruise ship

A technology of ultimate strength and incremental iteration, which is applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as not satisfying the flat section assumption, achieve short calculation operation time, stable and accurate calculation results, and high efficiency Improved effect

Pending Publication Date: 2020-07-28
ZHEJIANG UNIV OF TECH
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Problems solved by technology

Due to the existence of shear deformation in the bending process of luxury cruise ships, the assumption of plane section is no

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  • Simplified incremental iteration method for calculating ultimate strength of luxurious cruise ship
  • Simplified incremental iteration method for calculating ultimate strength of luxurious cruise ship
  • Simplified incremental iteration method for calculating ultimate strength of luxurious cruise ship

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[0062] The present invention will be further described below in conjunction with the drawings.

[0063] Reference Figure 1 ~ Figure 5 , A simplified incremental iterative method suitable for calculating the ultimate strength of luxury cruise ships. By continuously increasing the curvature of the main hull and superstructure, when the average shear displacement of the transition layer reaches the ultimate shear displacement, the transverse section of the hull girder The bending moment above is regarded as the ultimate bending moment. Based on the Smith method, combined with the characteristics of the force and deformation of the passenger ship in the ultimate state, the deformation diagram of the side longitudinal wall from the stern to the midship in the sagging state is as attached figure 1 (Magnification 60 times), the following assumptions are made: 1) The main hull and superstructure meet the assumption of flat section during the bending process; 2) The horizontal shear stres...

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Abstract

The invention relates to a simplified incremental iteration method suitable for calculating ultimate strength of a luxurious cruise ship. The method comprises: establishing luxury cruise ship cross section calculation model; calculating the shearing rigidity, the ultimate shearing displacement and the total shearing rigidity of each supporting component of the conversion layer, and obtaining the ultimate shearing displacement of the whole conversion layer through comparison; respectively calculating initial neutralization elastic neutralization axis positions of the main hull and the superstructure; adjusting the position of a neutralizing shaft, and calculating longitudinal tension and pressure of the superstructure and the main hull until tension and pressure balance of the superstructure and the main hull is realized; obtaining the total bending moment on the cross section of the whole hull beam and the average shear displacement of the conversion layer; increasing curvatures of themain hull and the superstructure, and calculating corresponding strain and corresponding stress of each unit; and stopping increasing the curvature until the average shear displacement of the conversion layer reaches the limit shear displacement, and outputting the total bending moment. The method has high precision and efficiency.

Description

technical field [0001] The invention belongs to the field of ship structure design and relates to a simplified calculation method for the ultimate strength of luxury cruise ships. Background technique [0002] The superstructure of a luxury cruise ship has a large volume, complex structure, and large openings in the side walls, resulting in small shear stiffness and relatively large shear deformation, which weakens the role of the superstructure in the general longitudinal bending process and reduces the ultimate strength of the hull girder . Due to the existence of shear deformation in the bending process, the luxury cruise ship does not satisfy the assumption of plane section, so the traditional Smith method cannot be directly used to calculate the ultimate strength of the luxury cruise ship. Although the nonlinear finite element calculation of the whole ship can obtain the ultimate strength of the hull girder of the luxury cruise ship, it takes a lot of time and energy. ...

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Application Information

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IPC IPC(8): G06F30/15G06F30/23G06F119/14
Inventor 吴剑国邵智华田恬
Owner ZHEJIANG UNIV OF TECH
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