Evaluation of Force Coefficients on a Lattice Structure by Experimental Wind Tunnel Tests
摘要
Antenna masts are particularly vulnerable to dynamic wind forces, and the inclusion of ancillaries has been shown to substantially influence the loads acting on the mast. This study outlines an experimental investigation aimed at evaluating the drag, lift, and moment coefficients of a functional antenna mast. Wind tunnel experiments were carried out on a scaled 3D mast model under both smooth and turbulent airflow conditions, with five distinct ancillary configurations modeled after commonly observed patterns. Aerodynamic coefficients were derived for angles of attack spanning 0° to 360°. Measurements of drag, lift, and moment forces were taken using two six-axis force sensors attached to the model’s ends, while downstream three-dimensional velocity data were captured using a Cobra probe mounted on a rigid vertical mast. The results provide a detailed analysis of the force coefficients, emphasizing the impact of both linear and discrete ancillaries on the aerodynamic behavior of the mast.