A wind-tunnel study of the interaction between along-wind and cross-wind vibrations of tall, slender structures
When modelling vibrations of tall, slender structures in a wind-tunnel it is usually assumed that, with the dominant response of the structure in the lateral direction, models may be constructed to vibrate in that direction only without much loss of information. This assumption may be open to doubt....
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| Published in | Journal of wind engineering and industrial aerodynamics Vol. 3; no. 4; pp. 315 - 341 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
1978
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| Online Access | Get full text |
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| Summary: | When modelling vibrations of tall, slender structures in a wind-tunnel it is usually assumed that, with the dominant response of the structure in the lateral direction, models may be constructed to vibrate in that direction only without much loss of information. This assumption may be open to doubt.
In certain conditions coupling between the lateral and in-line modes of vibration can take place, and, for a lightly-damped structure, there is a significant energy transfer between the two motions of oscillation. This leads to an apparent increase in structural damping compared to values obtained with one degree of freedom (1 DOF) models which show larger amplitudes of lateral vibration.
This conclusion was reached on the basis of tests made on models placed in a simulated atmospheric boundary layer and mounted on a new gimbal system, designed and constructed to allow movement with either one or two DOF. |
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| ISSN: | 0167-6105 1872-8197 |
| DOI: | 10.1016/0167-6105(78)90036-3 |