A design method for a deep-sea pressure-resistant device composite material shell and application thereof
By establishing a prediction formula through nonlinear buckling analysis and response surface regression, the problem of nonlinear buckling load prediction for hybrid fiber layup configurations in deep-sea pressure-resistant devices was solved, achieving the effect of maintaining high buckling load capacity and structural stability while reducing costs.
Patent Information
- Application Number
- CN202610691140.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-19
- Publication Date
- 2026-08-11
AI Technical Summary
Existing technologies lack nonlinear buckling load prediction models for hybrid fiber layup configurations in deep-sea pressure-resistant devices, making it difficult to maintain high buckling capacity while reducing material costs. Furthermore, there is a lack of systematic mechanistic explanations and cost-benefit assessment methods for initial geometric defects and hybrid layup characteristics.
A nonlinear buckling analysis model was adopted, and the nonlinear ultimate bearing load was extracted by the Riks arc length method. A prediction formula was established by combining response surface regression, and the relationship between the proportion of hybrid fibers and cost was quantified. A composite shell structure with high modulus fibers concentrated on the inner and outer surfaces and low modulus fibers in the middle layer was designed. The performance and cost were quantitatively analyzed using RP, RC, and MPR indicators.
It enables precise correction of the linear theoretical buckling load, improves the reliability of load-bearing capacity assessment, reduces material costs, enhances structural stability and damage tolerance, and provides a flexible design decision-making tool.