Vibration-based structural damage monitoring system for nuclear power station

A technology of structural damage and monitoring system, which is applied in the direction of machine/structural component testing, measuring devices, instruments, etc., and can solve problems such as incomplete reflection of damage and difficulty in manual detection

Inactive Publication Date: 2018-05-01
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For structures such as steel containment vessels, first of all, manual inspection is relatively difficult, and even if the strain gauges are preset, it cannot fully reflect all damage conditions of the structure during service

Method used

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Embodiment Construction

[0016] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 As shown, a vibration-based nuclear power plant structural damage monitoring system provided by an embodiment of the present invention includes:

[0018] Online monitoring part 1, which includes an external excitation device, a data acquisition device and a structural digital model;

[0019] Real-time analysis part 2, which includes data processing, statistical analysis, system identification, model correction and simulation calculation;

[0020] Damage diagnosis part 3, which includes a device for early warning, positioning and evaluation of structural damage parts using mode shape curvature and modal strain energy as damage identification indicators;

[0021] State evaluation part 4, which includes a de...

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Abstract

The invention provides a vibration-based structural damage monitoring system for a nuclear power station. The system comprises an online monitoring part, a real-time analysis part, a damage diagnosingpart, a state evaluating part and a maintenance deciding part which are sequentially connected. According to the vibration-based structural damage monitoring system for the nuclear power station, thetimed or regular monitoring tasks can be realized, only 1-2 controllers are required, and relevant people does not need to stay in a radiation workshop; the controllers can command the online monitoring part and control an exciting device and a data collection device to work; and the collected data can be automatically analyzed and processed by the system, and the damage can be positioned and evaluated by virtue of a selected signal processing method.

Description

technical field [0001] The invention relates to a damage monitoring system for a nuclear power plant or a structure, in particular to a vibration-based regular in-service monitoring of a nuclear power plant and a detection method under special circumstances. Background technique [0002] There are many production-related workshops in nuclear power plants, among which the earthquake-resistant Class I and II workshops have the highest importance and safety requirements. Seismic-resistant Category I workshops either contain radioactive substances or prevent leakage of radioactive materials, or play a role in ensuring that nuclear power plants are safe during accidents. It plays an important role in the normal operation of various safety measures for mitigating accidents, and is divided into different shielding areas according to the radiation intensity. [0003] According to the requirements of the current nuclear safety regulations, the nuclear power plant should be inspected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/00
Inventor 王波叶苏疏于晓梅
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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