Method and device for iteratively optimizing the crashworthiness of a marine structure under multiple load cases

By using a fiber beam-pile-soil coupling model and finite element analysis, the problems of pile-soil coupling effect and material plastic energy absorption during ship collision impact of marine structures were solved. This enabled automatic iterative optimization design of marine structures under multiple working conditions, improving the accuracy and efficiency of the design.

CN122154357APending Publication Date: 2026-06-05ZHEJIANG YUANSUAN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG YUANSUAN TECH CO LTD
Filing Date
2026-05-09
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies cannot accurately reflect the pile-soil coupling effect in simulating ship collision impacts on marine structures, and ignore material properties and plastic energy absorption, resulting in biased prediction of structural damage modes, low efficiency of the design process, and difficulty in quickly finding safe and economical design solutions under multiple working conditions.

Method used

A fiber beam-pile-soil coupling model is adopted. A finite element analysis model containing soil layer information is established through finite element analysis. Static solution is performed by applying the dead load during the operation period. The energy and deformation of multiple impact conditions are calculated. The impact coefficient and member size are adjusted, and the final member diameter and wall thickness are output to achieve automatic iterative optimization.

Benefits of technology

It improves the accuracy and efficiency of marine structure design, can automatically optimize design schemes under multiple working conditions, ensures that the structure meets safety requirements in all possible collision scenarios, and enhances the level of intelligence in design.

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Abstract

The application provides a marine structure anti-collision performance multi-working condition iterative optimization method and device, including: establishing a finite element analysis model containing soil layer information; applying an operating period dead load to the finite element analysis model and performing static force solving to obtain an initial working condition of a ship collision load; obtaining a plurality of impact working conditions, calculating total ship collision energy and deformation control displacement; performing trial calculation on components of the finite element analysis model and setting the components as fiber beam units; calculating structure energy absorption of the plurality of impact working conditions; calculating energy ratios of the plurality of impact working conditions based on the structure energy absorption and the total ship collision energy, adjusting impact coefficients based on the energy ratios; calculating maximum displacements of the plurality of impact working conditions, calculating displacement ratios of the plurality of impact working conditions based on the maximum displacements and the deformation control displacement, adjusting diameters of rod members and wall thicknesses of the rod members based on the displacement ratios; and outputting final diameters of the rod members and wall thicknesses of the rod members. In the method, marine structure sizes can be automatically iteratively optimized, and the working efficiency of designers is improved.
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