Modal analysis method and apparatus therefor

摘要: A modal analysis method and apparatus for acoustically determining vibration characteristics of a structure uses MISO model. An acoustic excitation signal toward spatially distributed locations associated with the is generated while latter held vibrated, one location being chosen as reference. Complementary sets input pressure-related signals are produced, reference signal. Fourier performed on to provide correlated data in frequency domain including data. Induced output sensed at point corresponding produce complementary signals, which converted through into domain. Structural transfer functions characterizing each set obtained from vibratory derived.