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Method for optimized arrangement of strain sensor

A technology of strain sensor and layout method, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as lack of systematic solutions, and achieve the effect of optimizing layout and improving health monitoring and evaluation systems

Inactive Publication Date: 2013-09-04
SOUTHEAST UNIV
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Problems solved by technology

At present, the arrangement of strain sensors is mostly obtained according to experience or simple simulation analysis, and systematic solutions are still lacking.

Method used

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  • Method for optimized arrangement of strain sensor
  • Method for optimized arrangement of strain sensor
  • Method for optimized arrangement of strain sensor

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Embodiment Construction

[0021] Attached below Figures 1 to 10 The present invention is described further.

[0022] Such as figure 1 As shown, a strain sensor optimal layout method of the present invention is a hierarchical layout strategy by means of multi-scale finite element technology, which specifically includes the following steps:

[0023] 1. Establish a simplified model of the bridge, analyze and determine the key section, which is the monitoring section where strain sensors need to be arranged;

[0024] 2. Establish a structural multi-scale finite element model for the beam section containing the key section, and obtain the unfavorable position of the force on this section, which is the position where the strain sensor needs to be arranged;

[0025] 3. Establish a mesoscopic model of the local details of the key components on the monitoring section for hot spot stress analysis, and determine the location of the local details.

[0026] The multi-scale finite element refers to the establish...

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Abstract

The invention discloses a method for optimized arrangement of a strain sensor. The method comprises the following steps of building a simplified bridge model, confirming a monitoring cross section needing to be provided with the strain sensor, building a structural multi-scale finite element model on a bridge section including the monitoring cross section, obtaining the position which is located on the monitoring cross section, is stressed adversely and needs to be provided with the strain sensor, building a mesoscopic model of a local detail of a critical element on the monitoring cross section, carrying out hot spot stress analysis, and confirming the spot distribution position of the local detail. By the help of a multi-scale finite element modeling strategy, the method provides an optimized scheme of the strain sensor in a health monitoring system of a bridge, especially a long-span bridge by different levels, can obtain the comprehensive information of structural critical positions with few strain sensors, and is both safe and economical.

Description

technical field [0001] The invention relates to bridge health monitoring, in particular to a method for optimally arranging strain sensors used in a long-span bridge health testing system. Background technique [0002] After nearly 20 years of development, health monitoring systems have been widely used to monitor the status of large and complex civil engineering structures such as bridges. Long-term on-line monitoring is realized through sensors, and the health monitoring system can obtain the real response of the civil engineering structure under operating conditions. Safety during operation. [0003] The effective operation of the structural health monitoring system is inseparable from the sensor layout system, and the sensor layout (type, location and quantity) plays a decisive role in the monitoring results. Therefore, the optimal arrangement of sensors becomes the key to the health monitoring system. At present, the arrangement of strain sensors is mostly obtained a...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 吴佰建孙正华李兆霞王康
Owner SOUTHEAST UNIV
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