Novel welding structure health monitoring system and method

Abstract

The invention discloses a novel welding structure health monitoring system and method, and solves the technical problems that the existing structural design is unreasonable, the structural health monitoring durability of a steel structure in the service process is poor, the accuracy is low, and the stress intensity factor of the crack tip of the welding structure cannot be mastered for a long timein real time. The novel welding structure health monitoring system comprises an MFC sensor and a signal acquisition and processing system which are electrically connected with each other, wherein theMFC sensor is adopted to collect strain data around a welding seam of the welding structure and convert the strain data into a voltage signal, and the signal acquisition and processing system is adopted to collect, record and calculate the voltage signal output by the MFC sensor to obtain a crack stress intensity factor; and safety assessment is carried out by combining the crack stress intensityfactor, and the residual life of the welding structure is predicted. The invention further provides the monitoring method which can be widely applied to the technical field of structural health monitoring.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to a novel welding structure health monitoring system and method. Background technique [0002] Structural health monitoring (Structure health monitoring, SHM) is the process of damage identification and characterization for engineering structures. Structural damage refers to the change of material parameters and geometric characteristics of structures under the influence of external loads and other factors. The process of structural health monitoring is to use sensors to periodically sample the structure, analyze the data, and extract characteristic factors sensitive to damage from the data to determine the current health status of the structure. In recent years, with the development of sensor technology, information collection technology and test analysis technology, various welded structure health monitoring systems have been widely used in bridg...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings and deficiencies in the prior art, the present invention provides a system that is easy to use, simple in calculation, correct in method, high in accuracy, strong in durability, can realize real-time and long-term effective monitoring, and makes up for the inability of the prior art. Real-time and long-term grasp of the defects of the stress intensity factor of the crack tip of the welded structure, which can be applied to actual engineering tests, and can be applied to a wide range of new welded structure health monitoring systems and methods

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