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Non-destructive health detecting method for large structural matter

A non-destructive testing and structural object technology, applied in the direction of measuring devices, special data processing applications, instruments, etc., can solve the problems that the quality of modal parameters cannot be normalized, the non-destructive testing of offshore platform structures is inconvenient, and the diagnosis algorithm is not applicable, etc.

Inactive Publication Date: 2009-12-30
OCEAN UNIV OF CHINA
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Problems solved by technology

This type of technology is only used for known damage areas. Even if the modal parameters under the excitation of environmental loads can be identified, the identified modal parameters cannot be normalized in quality. Therefore, most of the currently developed damage diagnosis algorithms are not applicable.
In addition, these techniques require special test equipment and specialized personnel
Therefore, these methods are inconvenient and expensive for non-destructive testing of offshore platform structures

Method used

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  • Non-destructive health detecting method for large structural matter
  • Non-destructive health detecting method for large structural matter
  • Non-destructive health detecting method for large structural matter

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specific Embodiment

[0044] Specific examples are as follows, and the scope of protection of the present invention is not limited to the following examples.

[0045] 1. Establish the finite element numerical model of the offshore platform:

[0046] ·The embodiment of the present invention simulates and researches that the offshore platform structure is located at a water depth of 97.4m, and the structure is composed of vertical piles, horizontal braces and diagonal brace members, with a total of 207 units, see figure 1 shown. The simulated dynamic response data were generated using commercial finite element software (Ansys Version 7.0, ANSYS Inc., 275 Technology Drive, Canonsburg, PA 15317.). The acceleration sensor that the present invention adopts, its model: American SILICON DESIGNS company produces, Model2220-005. In addition, a data acquisition instrument is used, its model: PL16-DCB8 produced by Germany Imc Integrated Measurement and Control Co., Ltd. In addition, the buildings on the pla...

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Abstract

The nondestructive health detection method for large structure includes the following steps: storage step, identification and location step, damage extent evaluation step and comparison and definition step. Said method can effectively detect the damaged position of said structure and can verify the correctness of the damage-diagnosed result. Said invention also provides the working principle of said detection method.

Description

technical field [0001] The invention relates to the improvement of a health monitoring system for large civil engineering structures, in particular to a health detection method for large structures without damage. It is mainly aimed at complex large-scale civil engineering structures such as offshore platforms, under the excitation of environmental loads, using dynamic testing to perform non-destructive testing methods on structures. The invention proposes a damage diagnosis method suitable for real-time monitoring of large structures such as ocean platforms, which is used to establish a structural health monitoring system, improve the fatigue life of the structure and the survivability under extreme environmental loads, so as to improve the safety and economy of the structure and make workers feel safe. Background technique [0002] As we all know, environmental incentives are not easy to test, so structural damage diagnosis technology based on environmental loads is very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/08G06F17/00
Inventor 李华军杨和振王树青杨永春石湘
Owner OCEAN UNIV OF CHINA
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