Broadband dynamic parameters measurement by longitudinal vibration testing using pulse wave
نویسندگان
چکیده
Paper presents a method to measure the dynamic parameters of viscoelastic material bar by the longitudinal vibration testing in a wide frequency range. In the measurement, one end of the bar is driven by a transducer using a pulse wave and the other end is allowed to move freely. The vibration velocity of the free end of the bar is measured by a laser Doppler vibrometer. The dynamic parameters are calculated from the vibration velocity ratio between the long bar and the short bar over a wide frequency range since the driven signal of the pulse wave is a broadband signal.
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