Investigation on Coherence Characteristics of Wind Pressure on Hemispherical domes

Abstract

[[abstract]]Systematic wind tunnel tests were conduct to investigate coherence characteristics of any two fluctuating wind pressures along the meridian on hemispherical domes under smooth and turbulent wind flows. Reynolds number was alternated from 6.6×104 to 1.9×106 for both flows. Contour plots of root-coherence values with respect to frequency and reference location were given to show only little inconsistency due to Reynolds number effect. On the other hand, approaching turbulence, simulated in turbulent flow, showed distinct differences, especially in the windward and dome apex region. A modified form proposed by Hui et al (2009) was applied for the approximation of root-coherences rather than Davenport’s proposed. It was concluded that not only the location of the reference tap but also the distance between two taps, can significantly determine the distribution features of coherences.[[sponsorship]]CSIR-Structural Engineering Research Centre[[conferencetype]]國際[[conferencedate]]20131210~20131214[[booktype]]電子版[[iscallforpapers]]Y[[conferencelocation]]Chennai, Indi