Aeroelastic friction nonlinear vibration of composite panels under strong noise

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (13) : 216-221.

ZHANG Junxian1, QU Yegao1, XIE Fangtao1, GUO Qiwei2, ZHANG Chongfeng3

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Abstract

Here, based on von Karman’s nonlinear strain theory, Reddy’s third-order shear sawtooth theory and the quasi-steady first-order piston theory, the aeroelastic nonlinear dynamic finite element numerical computation model for a composite panel with friction boundary under strong noise load was established. Gauss band-limited white noise and the macro stick-slip friction model were used to describe noise load and non-smooth friction characteristics of the laminated panel boundary, respectively. Nonlinear vibration responses of the panel subjected to the combined action of acoustic load and aerodynamic load were solved by using the time-domain direct integration Newmark-β method and Newton-Raphson iterative method. Effects of acoustic load and friction boundary on panel flutter characteristics were studied. The results showed that sliding motion on friction boundary can dissipate vibration energy of the laminated panel and suppress its vibration response; under the action of strong noise and aerodynamic load, vibration of the panel can reveal limit-cycle vibration dominated by aerodynamic load and random vibration approximately obeying normal distribution dominated by strong noise load.

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composite laminated panel / noise load / panel flutter / friction boundary

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ZHANG Junxian1, QU Yegao1, XIE Fangtao1, GUO Qiwei2, ZHANG Chongfeng3. Aeroelastic friction nonlinear vibration of composite panels under strong noise[J]. Journal of Vibration and Shock, 2021, 40(13): 216-221

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