Health monitoring system integrating finite element analysis model updating technology

Abstract

The invention discloses a health monitoring system integrating the finite element analysis model updating technology. The system consists of six parts including an SS (sensor system), a DATS (data acquisition and transmission system), a DPCS (data processing and control system), an SHES (structure health evaluation system), an IMS (inspection maintenance system) and a finite element analysis MUS (model updating system). The finite element analysis MUS consists of two major parts including a finite element analysis model for establishing the initial standard and an updated finite element analysis model. The finite element analysis model updating function can be carried out by the health monitoring system under the condition without traffic closing, and the accurate and reliable finite element model analysis results can be provided.

Description

technical field [0001] The invention belongs to the field of finite element analysis model correction and relates to a health monitoring system integrating finite element analysis model correction technology. Background technique [0002] Finite element modeling and model correction is one of the core technologies of the bridge health monitoring system, and it is also an indispensable prerequisite and foundation for other core technologies of the bridge health monitoring system (including structural dynamic analysis, damage identification, safety assessment and early warning). The finite element analysis model is a numerical simulation of the actual structure, relying on a series of mathematical formulas to "invert" the real behavior of the structure. The established finite element analysis model must be the mathematical and physical representation of the structural prototype, so as to provide comprehensive information for the response of the structure under various working ...

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Problems solved by technology

This method requires that the test must be carried out under the premise of clearly determining the applied load, and the conditions of the applied static load must be strictly controlled. When loading, it not only consumes a lot of manpower and material resources, but also must terminate the normal working state of the structure.

Due to the high cost, time-consuming and labor-intensive method of establishing the baseline finite element analysis model, the baseline finite element analysis model used in the health monitoring system will not be corrected afterwards

In actual situations, with the operation of the structure, the actual bridge structure will experience functional degradation due to damage, aging of structural components, etc., and the initially established benchmark finite element analysis model may not be able to comprehensively and correctly reflect the real structure. state, the error between the analysis data obtained by the health monitoring system and the actual results will gradually increase, and eventually the conclusions drawn by the health monitoring system will not match the actual results. Therefore, it is necessary to revise the finite element analysis model again.

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