Abstract： A broadband method to identify the dynamic parameters of viscoelastic bar using resonance measurement by pulse signal is presented. A controllable broadband pulse is generated by the exciter and is used to force the longitudinal vibration of a viscoelastic thin bar. The vibration velocities of the free end of the bar and the exciter are measured respectively by a laser vibrometer. The velocity ratio can be obtained over a wide frequency range. Thus, the storage modulus and the loss factor can be determined at resonant frequencies. Moreover, the testing process is simulated by finite element calculation. The proposed method is demonstrated valid and accurate by comparison with the viscoelastic apparatus test.
侯宏 余虎 孙亮. 基于共振法的粘弹性细棒力学参数宽频测试[J]. 振动与冲击, 2015, 34(9): 107-110.
HOU Hong YU Hu SUN Liang. Determination of dynamic parameters of viscoelastic thin bar using resonance measurement by pulse method. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(9): 107-110.
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