Study on the aerodynamic energy transfer characteristicsin coupled flutter of plate

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (10) : 55-61.

论文

Study on the aerodynamic energy transfer characteristicsin coupled flutter of plate

Liu Zu-jun1,2 Yang Yong-xin2 Ge Yao-jun2

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Abstract

Flutter coupled motion equations were uncoupled by step-by step analysis method. The flutter energy mechanism analysis framework of structure-fluid was established through consider the damping effects of motion equation. The main aerodynamic energy input characteristics of plate were studied by wind tunnel test. The result showed that coupling aerodynamic derivatives built energy transmission way in two degrees of freedom .Phase difference between the torsional vibration and the vertical vibration was gradually decreased in the flutter, which made coupled aerodynamic derivatives transport energy ability become strong. The energy of system was mainly dissipated by the aerodynamic damping of twist motion .The energy dissipation capacity was closely related with aerodynamic derivative , but had no relationship with the phase difference. The aerodynamic stiffness of twist motion had no contribution to the system energy in a vibration cycle, so it had very small inference on the coupled flutter.

Key words

Flutter energy / The characteristics of aerodynamic energy input and conversion / Incentive-feedback mechanism / step-by-step analysis / plate

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Liu Zu-jun;Yang Yong-xin Ge Yao-jun. Study on the aerodynamic energy transfer characteristicsin coupled flutter of plate[J]. Journal of Vibration and Shock, 2013, 32(10): 55-61