| Title |
An Analysis of the Contribution Pattern of Vortex-Induced Load Components to Across-Wind Response |
| DOI |
https://doi.org/10.5659/JAIK.2020.36.7.147 |
| Keywords |
Across-wind Vibration; Vortex-induced Load; Inverse Problem; Kalman Filtering; Wind Tunnel Test; Load Decomposition |
| Abstract |
As the vortices around the structure are transferred to the dynamic wind load, across-wind vibration is induced, and the magnitude of the
vibration is larger than the along-wind vibration when the height of the structure is increased. In this study, in order to quantitatively
evaluate across-wind response, the vortex-induced load components are classified according to their own original source, and the effect of
each component on the vibration is analyzed. The load is identified from the response of the structure by inverse problem, and these load
components are obtained by Kalman filtering based on the state equation realized from the distribution characteristics of loads spectrum in
the frequency domain. The proposed load decomposition process for vortex-induced load components is verified by performing an aero-elastic
model test for the circular cylinder model in the atmospheric boundary layer wind tunnel, and the pattern in which each load component
contributes to the across-wind response is analyzed, and finally the original source of the loads as well as the unique behavior of across-wind
response can be precisely understood. |