Deep water structure health monitoring method and system

CN121954133BActive Publication Date: 2026-05-29TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL
Filing Date
2026-03-31
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing deep-water structural health monitoring methods struggle to achieve stable and high-precision reconstruction of the full-field response under unilateral sparse measurement conditions, especially when sensor placement is limited, resulting in pathological and noise amplification issues.

Method used

A method based on unilateral inverse finite element and geometrically guided hybrid regularization is adopted. By establishing an inverse finite element mapping between unilateral surface strain and nodal displacement, a geometrically guided hybrid regularization operator for membrane and bending states is introduced to construct a global regularization equation and apply boundary constraints to achieve stable and high-precision inversion of displacement, strain and stress across the entire field.

Benefits of technology

Under the condition of sparse sensing data on one side, stable and high-precision reconstruction of the full-field response of deep-water structures was achieved. In particular, it showed excellent reconstruction accuracy in locations with drastic response changes, such as the top of the head and the transition area of ​​the cylindrical shell. It solved the ill-conditioned and noise amplification problems that are easy to occur under the measurement conditions in traditional methods.

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Abstract

The application discloses a deep water structure health monitoring method and system, the method comprises the following steps: establishing a discrete model and constructing a unit strain matrix; collecting unilateral surface strain data and establishing a mapping relationship between unilateral surface theoretical strain and node displacement; constructing a unilateral inverse finite element data fitting term containing a surface strain fitting term and a transverse shear strain penalty term; constructing a geometric guide mixed regularization term composed of a membrane regularization term and a bending regularization term; assembling a global equation to solve the full-field displacement; restoring the full-field strain and stress and outputting the monitoring result. The system comprises a data acquisition module, a preprocessing and inverse reconstruction module, a stabilization solving module and a visualization output module. The application is based on a full-field response sensing scheme of unilateral inverse finite element and geometric guide mixed regularization, can realize stable and high-precision inversion of structure full-field displacement, strain and stress under the condition of only relying on unilateral sparse sensing data, and effectively breaks through the dependence of traditional methods on bilateral sensing arrangement.
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Citation Information

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