Frequency Domain Modal Parameter Identification Method

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Resource Overview

A frequency domain approach for modal parameter identification that analyzes vibration signals to extract structural natural frequencies, damping ratios, and mode shape coefficients, featuring robust implementation with complete algorithmic procedures

Detailed Documentation

This frequency domain modal parameter identification method enables detailed analysis of vibration signals to determine critical structural characteristics including natural frequencies, damping ratios, and mode shape coefficients. The approach employs advanced signal processing techniques such as Fast Fourier Transform (FFT) for frequency domain conversion and frequency response function (FRF) analysis for modal extraction. The implementation includes complete algorithmic workflows featuring peak picking algorithms for frequency identification, circle-fit methods for damping calculation, and modal scaling procedures for shape coefficient determination. This method demonstrates high effectiveness with fully functional code implementation supporting batch processing and automated parameter optimization.

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