Recognition Method of Pulling Force of Bridge Cable
An identification method, bridge cable technology, applied in the direction of tension measurement, force/torque/work measuring instrument, instrument, etc., can solve the problems of insufficient efficiency and accuracy, misjudgment, long time, etc., and achieve reliable cable force estimation Effect
Active Publication Date: 2019-07-02
JIAXING NAJIE MICROELECTRONICS TECH
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Problems solved by technology
This method is insufficient in terms of efficiency and accuracy, and there will be misjudgments, and there are many problems, especially for bridges with many cables, time is a big problem
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Embodiment 1
[0036] The invention provides a method for identifying the pull force of a bridge cable, such as figure 1 As shown, the identification method includes:
[0037] Step 1, obtaining original signal data, performing linear fitting processing on the original signal data, and performing Fourier transform on the processed data;
[0038] Step 2, select the frequency peak value f after Fourier transform max , calculate the theoretical fundamental frequency combined with the peak frequency f from the design parameters of the structure max Calculate the k-order frequency corresponding to the frequency peak value, and then calculate the actual fundamental frequency value, perform spectrum partitioning according to the vibration mode, and obtain the N-order frequency corresponding to the actual cable;
[0039] Step 3: Perform linear regression processing according to the N-order frequency corresponding to the cable, obtain the slope C (actual fundamental frequency) of the regression line...
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The invention provides a bridge cable pulling force recognition method. The method comprises the steps that original signal data is acquired, linear fitting processing is conducted on the original signal data, and Fourier transformation is conducted on the processed data; the data obtained after Fourier transformation is selected and combined with a vibration mode to conduct frequency spectrum partition, and corresponding order frequencies of a cable are obtained; linear regression processing is conducted according to the corresponding order frequencies of the cable, and a result is determined. After being acquired, the original signal data is processed by a series of data processing methods, and by combining the method of frequency spectrum partition and acquisition of the order frequencies corresponding partitions, the cable force estimation value of the cable pulling force is determined on the basis of the multiple-order frequency after linear regression is conducted. By adopting the multi-order frequency to conduct estimation, the problems caused by the fact that vibration of the order of the cable is not excited or the installation position of a damper is inappropriate are solved, and then the reliable cable force estimation value is obtained.
Description
technical field [0001] The invention belongs to the field of electric equipment, in particular to a method for identifying the pull force of a bridge cable. Background technique [0002] Traditional bridge cable pull force identification mainly relies on the acquisition system to collect raw data, and then perform spectrum analysis on the original data. The fundamental frequency of the bridge cable is obtained by identifying the spectrum map with human eyes, and then the pull force of the bridge cable is calculated through the formula. This method is insufficient in terms of efficiency and accuracy, and there will be misjudgment, and there are many problems, especially for bridges with many cables, time is a big problem. Contents of the invention [0003] In order to solve the shortcomings and deficiencies in the prior art, the present invention provides a method for identifying the pull force of bridge cables for reducing the probability of misjudgment. [0004] In order...
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IPC IPC(8): G01L5/04
CPCG01L5/042
Inventor 沈烨斌周骏董杰周国辉
Owner JIAXING NAJIE MICROELECTRONICS TECH