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Cable stayed bridge health monitoring sensor optimization layout method and system

A technology for health monitoring and layout methods, used in design optimization/simulation, instrumentation, special data processing applications, etc.

Inactive Publication Date: 2016-09-28
SHIJIAZHUANG TIEDAO UNIV +2
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a cable-stayed bridge health monitoring sensor optimization arrangement method and system that can avoid the defects of low iteration or optimization efficiency and has the advantages of high monitoring efficiency and high accuracy.

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  • Cable stayed bridge health monitoring sensor optimization layout method and system
  • Cable stayed bridge health monitoring sensor optimization layout method and system
  • Cable stayed bridge health monitoring sensor optimization layout method and system

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Embodiment Construction

[0053] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] see figure 1 , in one embodiment, the cable-stayed bridge health monitoring sensor optimization arrangement method may include the following steps:

[0055] S100, according to the correlation between the damage factors of all beam segment units of the cable-stayed bridge and the mode shape of the node degrees of freedom, obtain a node degree of freedom damage information index including damage information of all beam segments.

[0056]It can be understood that when optimizing the arrangement of sensors, it is necessary to use parametric tests to test the significance of the parameters, and to study the influence of the damage factors of all beam elements on the vibration mode values ​​of the joint degrees of freedom. The parameter significance test is global and overcomes the defects of sensitivity analysis. Parametric experi...

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Abstract

The invention discloses a cable stayed bridge health monitoring sensor optimization layout method comprising the following steps: obtaining node degree of freedom damage information indexes containing all beam segment damage information according to correlation between damage factors of all beam segment units of the cable stayed bridge and a node degree of freedom vibration mode; ranking the node degree of freedom damage information indexes according to the contained damage information; processing the ranked node degree of freedom damage information indexes according to a sensor optimization layout method based on modal observability, thus obtaining sensor layout positions. The cable stayed bridge health monitoring sensor optimization layout method can prevent low iteration or optimization efficiency, is simple, efficient, and practical. The invention also provides a cable stayed bridge health monitoring sensor optimization layout system.

Description

technical field [0001] The invention relates to the technical field of cable-stayed bridges, in particular to a method and system for optimally arranging health monitoring sensors of cable-stayed bridges. Background technique [0002] The sensor system is an important part of the bridge structure health monitoring system. According to the vibration data collected by the sensor system, the modal parameter identification under environmental excitation is carried out, and the obtained modal parameters (including frequency and mode shape value of the measuring point) are the basis for dynamic damage identification. [0003] The cable-stayed bridge has a large span, a huge size, and complex types. In addition to the site conditions and health monitoring system construction, maintenance costs, and the difficulty of processing massive data, only a limited number of sensors can be deployed. With limited sensors placed on the cable-stayed bridge, whether the modal parameters of the ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 刘杰王海龙张志国曹立辉吕鹏戎密仁
Owner SHIJIAZHUANG TIEDAO UNIV
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