Frequency Domain Modal Parameter Identification Method

This frequency domain modal parameter identification method is a comprehensive approach for detailed vibration signal analysis and processing. The technique extracts critical structural parameters including natural frequencies, damping ratios, and mode shape coefficients through sophisticated spectral analysis algorithms. The implementation typically involves Fast Fourier Transform (FFT) processing for frequency domain conversion, followed by peak-picking algorithms for modal identification and circle-fit or rational fraction polynomial methods for parameter extraction. The method demonstrates high effectiveness with complete program implementation featuring automated modal analysis workflows. Additionally, the approach finds applications in structural health monitoring systems and mechanical fault diagnosis, utilizing vibration signatures for condition assessment. With its robust algorithmic foundation and practical implementation capabilities, this method holds significant application potential across various engineering domains including aerospace, civil infrastructure, and mechanical systems.