کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
291991 | 509792 | 2006 | 13 صفحه PDF | دانلود رایگان |

It is useful to study the ambient non-stationary response of a cable-supported bridge to monitor the “aeroelastic status” of the structure. In the absence of effective non-stationary analyzing tools, it is suitable to have signal processing techniques to pre-examine the measured ambient responses for the time scale at which the aeroelastic system varies to know if the recording can be treated as a quasi-stationary process or must be treated as non-stationary one. Among the factors contributing to the non-stationarity, the effect of signature turbulence is studied in this paper by joint time–frequency analysis on wind tunnel experiments with a partially streamlined box girder sectional model. Hilbert transform combined with empirical mode decomposition method is used. Instantaneous frequency domain properties of the aeroelastic vibration are obtained. Time-dependant features of the interactive system are partially revealed.
Journal: Journal of Sound and Vibration - Volume 291, Issues 1–2, 21 March 2006, Pages 202–214