Computational aspects of simulating wind induced ovalling vibrations in silo groups

JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS

卷:246

Article

Hillewaere, J.¹  Degroote, J.²  Lombaert, G.¹  Vierendeels, J.²  Degrande, G.¹ 

[1] Katholieke Univ Leuven, Dept Civil Engn, B-3001 Louvain, Belgium

[2] Univ Ghent, Dept Flow Heat & Combust Mech, B-9000 Ghent, Belgium

关键词: Wind induced vibrations;    Oval ling;    Accuracy;    Grid refinement;    Time step refinement;   

DOI  :  10.1016/j.cam.2012.06.033

来源: Elsevier

【 摘 要 】

During a storm in October 2002, wind induced ovalling vibrations were observed on several empty silos of a closely spaced group of eight by five thin-walled silos in the port of Antwerp (Belgium). To determine realistic dynamic wind loads and hence clarify the cause of the wind induced ovalling vibrations in the silo group, 2D URANS simulations are performed for seven angles of incidence between 0 degrees and 90 degrees. The emphasis in this paper is on the extensive verification and validation of the simulations to ascertain the accuracy of the numerical results. Subsequent analysis of the fluctuating wind pressures on the silo surfaces shows that ovalling oscillations of the eigenmodes with three and four circumferential wavelengths will be induced at the lee side of the silo group, corresponding to the lowest structural eigenfrequencies of the silos and the pattern of the visually detected vibrations during the 2002 storm. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free