Method for testing safety of in-service steel bearing structural member

Abstract

The invention relates to a method for testing safety of an in-service steel bearing structural member. The method comprises the following steps of 1, acquiring of signals; 2, noise filtering of the signals; 3, processing of data: obtaining the data processing parameter delta(x) according to a cumulative amplitude function of the signal; 4, when delta(x) is greater than 0, starting safety evaluation, and determining the area of the tested structural member in a safety R-map map of the steel bearing structural member according to the delta(x); 5, according to the area, taking the corresponding measures to decrease the damage risk. The method has the advantages that the calculation method of the delta(x) reflects the information of sound transmitting source, the occurrence frequency and serious degree of the damage are considered according to the area determining step of the delta(x), and the safety and critical safety of the steel bearing structural member are considered; the method canbe used for treating the sound transmitting signal mixed with multiple damage states, and the defect of independent analysis on the sound transmitting data under different stress conditions is overcome.

Description

technical field [0001] The invention relates to the technical field of structural health monitoring, in particular to a method for testing the safety of in-service steel load-bearing structural parts. Background technique [0002] 16Mn steel (16 manganese steel) is a low-alloy steel developed in combination with my country's resource conditions. It has good comprehensive mechanical properties, excellent weldability, cold and hot workability, and corrosion resistance. It has been used as a key load-bearing structural part. It is widely used in large mechanical equipment such as bridges and hoisting and transporting machinery. After a certain period of service of these load-bearing structural parts, some failure accidents often occur, and damage is the main reason for their failure. Therefore, it is necessary to effectively identify the damage state and test the 16Mn steel bearings in a timely and correct manner. The damage degree of mechanical and structural parts provides a ...

AI Technical Summary

Problems solved by technology

However, most of the current research focuses on the separate analysis of the acoustic emission data under different stress conditions (such as tension, alternating load, etc.), which cannot well reflect the actual load conditions of the load-bearing structural parts.

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