Method for acquiring stress time-domain values of evaluation points by utilizing operating data of bridge crane

Abstract

The invention relates to a method for acquiring stress time-domain values of evaluation points by utilizing operating data of a bridge crane. The method mainly solves the technical problems of small sample space of acquired data, limited quantity of acquired evaluation point positions and the like existing in conventional bridge cranes. The invention adopts the technical scheme that the method for acquiring the stress time-domain values of the evaluation points by utilizing the operating data of the bridge crane comprises the following steps of: 1) using a data logger to acquire real-time operating data of a crane such as elevating capacity and the like; 2) preprocessing the data; 3) establishing a calculation model of a bridge crane structure; 4) calculating the internal force of a cross-section at certain time; 5) calculating the stress of an evaluation point at certain moment; 6) adding a correction value to or subtracting the correction value from an stress value obtained at certain moment to obtain a corrected stress value; 7) repeating the process to obtain internal forces and corrected stress data which correspond to a plurality of estimation points; and 8) arranging structural internal forces and stress data which are obtained by the calculation and correspond to multiple moments into stress spectrum data.

Description

technical field [0001] The invention relates to a method for obtaining stress time-domain values ​​of evaluation points by using bridge crane operation data, which belongs to a method for obtaining stress time-domain data of structural evaluation points through rapid calculation using batch operation data of bridge cranes. Background technique [0002] With the continuous advancement of science and technology and the improvement of the safety performance requirements of bridge cranes, the requirements for their safe operation are also getting higher and higher. For this reason, people have done a lot of work from various aspects, such as strengthening the use management of bridge cranes. , Add various limit devices for the safe operation of bridge cranes, etc. But it is not enough to do this, because the main component of the bridge crane - the metal structure has fatigue problems, even if other aspects are in place, the problem of the equipment structure itself will be a gr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical difficulties existing in the existing bridge cranes such as the small space for collecting data samples and the limited number of collected evaluation points, and to provide a utilization bridge with complete collected data samples and a large number of collected evaluation points. The method of obtaining the stress time domain value of the assessment point from the operation data of the crane

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