Sensitivity of twin-tower&rsquo;s aerodynamic forces and their correlation to spacing

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (23) : 8-16.

Sensitivity of twin-tower’s aerodynamic forces and their correlation to spacing

SHI Junyang, XIE Jiming

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Abstract

Aerodynamic interference and load correlation between twin-tower are important parameters to describe wind loads and do wind-resistant optimization, and the spacing between twin-tower has important effects on these parameters.Here, using the synchronous pressure integration (SPI) method, wind tunnel tests were performed to determine the function relationship between aerodynamic forces on twin-tower under conditions of different wind directions and spacing.Wind load correlations under different spacings were studied in time domain and frequency one, respectively by means of correlation coefficient and coherence function.Results indicated that in most cases, with decrease in spacing, wind load on each tower, in particular, cross wind fluctuating load tends to decrease; cross wind loads on twin-tower under multiple spacings reveal negative correlation, the negative correlation is more obvious when the twin towers are arranged forward and backward along wind direction; the selection of spacing plays an important role in twin-tower’s wind resistance optimization, and has a guiding significance for the design of conjoined body.

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twin-tower / aerodynamic interference / load correlation / effects of spacing between two towers / wind tunnel tests / synchronous pressure integration (SPI)

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SHI Junyang, XIE Jiming. Sensitivity of twin-tower’s aerodynamic forces and their correlation to spacing[J]. Journal of Vibration and Shock, 2020, 39(23): 8-16

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