Experimental Wind Pressure Distribution on Large-Span Three-Centered Cylindrical Reticulated Shell

The wind pressure characteristics of the surface of a large-span three-centered cylindrical reticulated shell are investigated using a rigid model in a atmospheric boundary layer wind tunnel and synchronized pressure measuring tests. The mean and fluctuating wind pressure distribution characteristics with typical wind directions, the power spectrum and the coherence of the fluctuating wind pressure between different measuring points are experimentally analyzed. The results show that the wind direction has a significant impact on the wind pressure distribution on the reticulated shell surface. In general, the windward of the reticulated shell is the positive pressure area; a negative pressure zone is formed on the top of shell under the impact of characteristic turbulence, such as the separation and reattachment of the air flow, and also the vortex shedding; at the edge of the shell, the wind pressure is obviously influenced by the column and conical vortexes, and violently changes. Furthermore, single peaks are also observed in the fluctuating wind power spectrum in most areas of the windward. It is similar to the typical longitudinal wind turbulence spectrum and can be deduced that the incoming wind turbulence is the major contribution to the along-wind pressure. In addition, the attenuation difference of the coherence is changed with the wind directions, and the coherence of the measuring points along the wind direction is stronger than those along the cross-wind direction. © 2019, Editorial Department of JVMD. All right reserved.