A hull section checking method considering superstructure effectiveness

By simplifying the finite element model to calculate the stress reduction factor kx and the main ship system number kh, the problem of the area reduction factor η being difficult to obtain accurately is solved, thus improving the accuracy and applicability of hull section verification.

CN117454501BActive Publication Date: 2026-08-07RES INST 708 OF CHINA STATE SHIPBUILDING CORP
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Patent Information

Application Number
CN202311287270.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-07
Publication Date
2026-08-07
Estimated Expiration
2043-10-07

AI Technical Summary

Technical Problem

In existing technologies, it is difficult to accurately obtain the area reduction factor η in the calculation of hull profile verification, resulting in inaccurate calculation results. This is especially true for ships with long superstructures, where traditional methods lack mechanical support and have large calculation errors.

Method used

A method for calculating the stress reduction factor kx based on a simplified finite element model is adopted, discarding the area reduction factor η and introducing the main hull stress coefficient kh. The method for calculating the stress reduction factor kx is established through a simplified finite element model, and the stress at each location is calculated in combination with the main hull system coefficient kh, thus improving the verification process.

Benefits of technology

It improves the accuracy of calculation results, simplifies the calculation process, avoids the uncertainty of the area reduction factor η, strengthens the theoretical basis, and is applicable to different ship structural characteristics.

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Abstract

The application relates to a hull section checking method considering the effective degree of superstructure, which adopts a calculation method of stress reduction factor k x based on a simplified finite element model x . By abandoning the difficult-to-calculate and difficult-to-verify parameter: area reduction factor η, a coefficient k h for the stress of the main hull is introduced on the basis of the stress reduction factor k x , the stress at each position of the whole section is calculated according to the stress reduction factor and the coefficient of the main hull, so that the calculation result is more accurate, and on the basis of the stress reduction factor k x considering the effective degree of superstructure, an estimation method based on a simplified finite element model is adopted. In the method, the stress reduction factor k x is not estimated by using various empirical formulas or theoretical formulas derived by ideal models, but a simplified finite element model is established according to the structural characteristics of specific ship types for calculation, so that the result can be more accurate for the structural characteristics of different ship types.
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