A novel spectral method for cross-wind vibrations: Application to 27 full-scale chimneys. Issue 171 (December 2017)

• Record Type: Journal Article
• Authors: Lupi, Francesca; Niemann, Hans-Jürgen; Höffer, Rüdiger
• Is Part Of: Journal of wind engineering and industrial aerodynamics. Issue 171(2017)
• Page Start: 353
• Page End: 365
• Publication Date: 2017-12
• Subjects: Vortex shedding -- Circular cylinders -- Full-scale chimneys -- Aerodynamic damping -- Cross-wind vibrations; Wind-pressure -- Periodicals; Buildings -- Aerodynamics -- Periodicals; Pression du vent -- Périodiques; Constructions -- Aérodynamique -- Périodiques; Buildings -- Aerodynamics; Wind-pressure; Periodicals
• DOI: 10.1016/j.jweia.2017.10.014
• Languages: English
• ISSNs: 0167-6105

Abstract

Abstract: The paper presents a collection of full-scale data selected from literature concerning measurements of cross-wind vibrations of chimneys. They belong to the original set of data, from which current codified methodologies - the Spectral Method by Vickery&Basu (1983) and the Effective Correlation Length Method by Ruscheweyh (1986) - were developed. The full-scale samples are critically reviewed; uncertain estimations and observations by eye are discarded. The application of the codified methodologies to the selection of full-scale chimneys reveals several inconsistencies in the prediction of cross-wind oscillations. The paper presents a novel Spectral Method, whose predictions reproduce very well the oscillations measured in full-scale. The method is developed through wind tunnel tests in forced-vibrations. The key is the modification of the aeroelastic damping model in the well-known Vickery Spectral Method. Highlights: Critical review of full-scale chimneys in literature. Evaluation on the performance of two codified methods for vortex excitation. The key contribution is a new model for aerodynamic damping. Damping Modified Spectral Method developed as extension of the Vickery model.