A Comparative Study of Wind Tunnel Tests and Design Codes in Evaluation of Along-Wind Effects on Towers

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Mode</td><td class="align_center" colspan="3">Natural frequency (Hz)</td><td class="align_center" rowspan="2">Measured damping ratio (%)</td></tr><tr class="thead"><td class="align_center">Measured</td><td class="align_center">ANSYS</td><td class="align_center">MIDAS</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">0.242</td><td class="align_center">0.253</td><td class="align_center">0.248</td><td class="align_center">1.0</td></tr><tr><td class="align_left">2</td><td class="align_center">1.648</td><td class="align_center">1.636</td><td class="align_center">1.642</td><td class="align_center">1.7</td></tr><tr><td class="align_left">3</td><td class="align_center">4.395</td><td class="align_center">3.919</td><td class="align_center">4.239</td><td class="align_center">—</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Modal properties of the Busan tower.</div>

Shock and Vibration

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Table 1

Table 1: A Comparative Study of Wind Tunnel Tests and Design Codes in Evaluation of Along-Wind Effects on Towers 