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There continues to be uncertainty in the aerodynamic excitation mechanisms causing large amplitude vibration of dry inclined cables on cable-stayed bridges. It has been suggested by several authors that effects in the critical Reynolds number range may be a source of excitation. In this paper, measured drag and lift coefficients are presented for a cylinder in the critical Reynolds number range. It is found that the lift is significant and is a consistent function of the angle of attack, despite the cylinder being nominally smooth and circular. Hence the Den Hartog criterion implies that classical galloping would occur for wind speeds in the critical Reynolds number range. Ongoing dynamic experiments on a new forced vibration rig aim to test the validity of quasi-steady theory in this situation.
|Title of host publication||6th European and African Conference on Wind Engineering, EACWE 2013|
|Publisher||International Association for Wind Engineering (IAWE)|
|Publication status||Published - 2013|
|Event||6th European and African Conference on Wind Engineering, EACWE 2013 - Cambridge, United Kingdom|
Duration: 7 Jul 2013 → 13 Jul 2013
|Conference||6th European and African Conference on Wind Engineering, EACWE 2013|
|Period||7/07/13 → 13/07/13|
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AEROELASTIC AND NON-LINEAR STRUCTURAL DYNAMIC INTERACTIONS OF SLENDER STRUCTURES
1/08/06 → 1/08/11