论文信息 - FLUID AND STRUCTURAL DAMPING MEASUREMENT USING AN ARMA TECHNIQUE

FLUID AND STRUCTURAL DAMPING MEASUREMENT USING AN ARMA TECHNIQUE

This paper aims to study experimentally the effective damping (including both structural and fluid damping) of an elastic circular cylinder, fixed at both ends, in a cross airflow. The structural dynamic strain was measured in the lift direction using an fibre-optic Bragg grating sensor. An auto-regressive moving average (ARMA) modelling was used to deduce effective modal damping ratios from the strain data. Comparisons between ARMA technique and conventional methods, log-decrement method and half-power-bandwidth approach (HPB), have also been presented.

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