Vibroacoustical Damping Diagnostics: Complex Frequency Response Function versus its Magnitude

In this paper new generic approach is proposed for damping diagnostics based on a forced oscillation method with sinusoidal and random white noise excitation. The main contribution of the paper is the development of a novel diagnostic technique. The proposed new approach and the traditional magnitude approach are compared and it is shown that the proposed approach provides an essential effectiveness gain over that of the magnitude approach.