Author:
Du Huanhuan,Fan Zikai,He Wei,Yang Zheguang
Abstract
AbstractThis study utilized 3D Large-eddy simulation to investigate the crosswind drag force on a square cylinder subjected to transverse wind fluctuation. Two distinct methods were employed to generate the fluctuation: a prescribed sine function at the inlet boundary and an upwind barrier. The frequency was normalized in the same Strouhal number form. The transverse wind fluctuation with a normalized frequency above 0.05 tends to excite the square cylinder transversely with the same frequency band. The frequency effect also exists on the square cylinder located downwind an obstacle half the square cylinder’s size. However, an obstacle 2.5 times the size of the square cylinder generates a cross-wind fluctuation with the normalized frequency of 0.04, which cannot excite the square cylinder transversely. The frequency effect from the upwind barrier significantly dampens with the distance and disappears at 8–10 times the square cylinder size.
Publisher
Springer Science and Business Media LLC
Reference27 articles.
1. Kim, Y. & Kanda, J. Characteristics of aerodynamic forces and pressures on square plan buildings with height variations. J. Wind Eng. Ind. Aerodyn. 98(8–9), 449–465 (2010).
2. Kareem, A. Cross-wind response of buildings. J. Struct. Div. ASCE 108(4), 869–887 (1982).
3. Kwok, K. C. Cross-wind response of tall buildings. Eng. Struct. 4(4), 256–262 (1982).
4. von Kármán, T. Aerodynamics: Selected topics in the light of their historical development. Cornell University Press, (1954).
5. Larsen, A. Aerodynamics of the tacoma narrows bridge–60 years later. Struct. Eng. Int. 10(4), 243–248 (2000).