A Decoupled Algorithm for Cable Parameter Identification by Frequency-Ratio-Offset

In this paper, the authors propose a parameter identification algorithm for bridge cables, based on frequency-ratio-offset (FRO). By introducing specific time and space scaling factors, the dynamic equation is non-dimensionalized and expressed in a very concise form, independent of all distributed cable parameters. The frequency equation has therefore just 2 variables, which can be easily solved to obtain the universal dimensionless frequency-length curve under specific boundary conditions. The authors construct a decoupled identification algorithm based on these curves, using the FRO to compare the dimensionless beam to its real-life version. Using a pair of measured frequencies, the algorithm enables simultaneous determination of any 2 of the 3 cable parameters. Laboratory tests and real-life applications show the algorithm’s accuracy and effectiveness. On the basis of statistical analysis of dozens of predicted and measured frequencies, the authors suggest a guideline for frequency selection, and discuss the effect of measurement error on the identification results. The proposed algorithm could be an effective tool for efficient identification of multiple parameters in a wide range of bridge cables.

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  • English

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  • Accession Number: 01895918
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 12 2023 9:36AM