8Bert C W. Material Damping: An Introductory Review of Mathematical Models, Measures and Exprimental Techniques[ J ]. Journal of Sound and Vibration, 1973, 29:129 -153.
9Bishop R E D, Gladwell G M L. An Investigation into the Theory of Resonance Testing[ J]. Phil Trans, 1963, 225: 225, 241 -280.
10Kolsterman A L. On the Experimental Determination and Use of Modal Representations of Dynamic Characteristics [ D ]. Cincinnati: University of Cincinnati, 1971.