Modal Parameter Identification in Frequency Domain

Modal parameter identification in frequency domain is a technique for extracting experimental structural modal parameters through frequency domain analysis. This approach processes frequency response data from test structures to identify key parameters including natural frequencies, damping ratios, and mode shapes, enabling comprehensive study of structural dynamic characteristics. In practical implementation, this typically involves applying signal processing algorithms to frequency response functions (FRFs) obtained from experimental measurements, often utilizing curve-fitting techniques or spectral analysis methods. Widely applied in engineering fields, this identification method provides engineers with critical insights into structural vibration behavior, serving as fundamental reference for structural design and analysis. Key computational steps may include Fast Fourier Transform (FFT) processing, peak picking algorithms for natural frequency detection, and complex modal analysis for extracting damping characteristics and mode shapes from frequency domain data.