Construction method and system of rock damage constitutive model and simulation analysis method and system of rock damage

By constructing a constitutive model of seawater corrosion rock damage under cyclic loads, the problem of lack of research on rock damage under cyclic loads in the existing technology is solved, and an accurate description of the fatigue mechanics of rocks and an optimized design of offshore wind power engineering structure is achieved.

CN119760814APending Publication Date: 2025-04-04POWERCHINA HUADONG ENG CORP LTD
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Patent Information

Application Number
CN202410734533.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-06-07
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The lack of research on rock damage to seawater corrosion under cyclic loads in the prior art, resulting in deterioration of the mechanical properties of rock foundations and damage to structural dynamic characteristics in offshore wind power engineering.

Method used

By constructing a constitutive model of seawater-corroded rock damage under cyclic loads, combining continuous damage mechanics and irreversible plastic strain method, the damage variable relationship and constitutive relationship are established to simulate the coupling effect of cyclic load and seawater corrosion.

Benefits of technology

The accurate description of the mechanical properties of rock fatigue under the combined action of cyclic load and seawater corrosion is achieved, and the safe construction and long-term stability evaluation of offshore wind power engineering structures are optimized.

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Abstract

The invention discloses a construction method and system of a rock damage constitutive model and a simulation analysis method and system of rock damage. The construction method comprises the following steps: soaking a target rock mass sample in a target liquid environment for a cyclic load test; according to continuous damage mechanics, a corresponding constitutive relation is established, and the constitutive relation is the relation of stress data, elastic modulus data, strain data and coupling damage; establishing a damage variable relationship, wherein the damage variable relationship is used for indicating a relationship between fatigue damage caused based on cyclic loading and mesoscopic damage caused based on target liquid environment corrosion and corresponding coupling damage; and taking irreversible plastic strain as an internal variable, and establishing a fatigue damage constitutive model of the target liquid environment corroded rock mass under the cyclic load effect based on the damage variable relationship and the constitutive relationship. According to the invention, the seawater corrosion-fatigue coupling damage variable is introduced, so that the deterioration characteristics of the fatigue mechanical property of the rock under the seawater corrosion and cyclic load coupling effect can be explored.
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