Construction and dynamic identification of aeroelastic test models for flexible roofs
Authors:
- Fabio Rizzo,
- Ayan Sadhu,
- Ali Abasi,
- Aleksander Pistol,
- Łukasz Flaga,
- Ilaria Venanzi,
- Filippo Ubertini
Abstract
The aeroelastic wind tunnel testing of fexible roofs made of hyperbolic paraboloid cable nets is a challenging task for designers and researchers, with very limited documented experiences in the literature. The reduced-scale model construction and its dynamic identifcation are the main issues to address when approaching this problem, mainly because of (i) the very small mass of the roof, (ii) the strict aeroelastic criteria to satisfy and (iii) a large number of very closely spaced signifcant natural frequencies. To suggest an approach to follow to investigate the wind—structure interaction for this structural typology, this paper discusses the aeroelastic scaling, the aeroelastic model construction, the dynamic modal identifcation and the FEM predictive numerical modelling of hyperbolic paraboloid roofs (HPRs) with square, rectangular and circular plan shapes and two diferent curvatures. Modal identifcation is especially challenging due to the presence of several closely spaced modes and it is here tackled by diferent methods such as Welch’s method, random decrement technique (RDT), Empirical mode decomposition with a time-varying flter (TVF-EMD) and frequency domain decomposition method (FDD). The satisfying accuracy of the aeroelastic scaling has been verifed by comparing the wind-induced vertical displacements of the prototypes against those of the experimental models. Furthermore, an extensive qualitative investigation of the natural mode shapes has been carried out revealing that test models reproduce most of the prototype modes.
- Record ID
- CUTc5dc9eed392343428f8c59c856be5871
- Publication categories
- ;
- Author
- Journal series
- Archives of Civil and Mechanical Engineering, ISSN 1644-9665, e-ISSN 2083-3318
- Issue year
- 2023
- Vol
- 23
- No
- 1
- Pages
- [1-31]
- Article number
- 16
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 30-31; Bibliografia (liczba pozycji) - 34; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 23, Iss. 1
- Keywords in English
- wind engineering, flexible roofs, aeroelastic, wind tunnel, model tests
- ASJC Classification
- ;
- DOI
- DOI:10.1007/s43452-022-00545-y Opening in a new tab
- URL
- https://link.springer.com/article/10.1007/s43452-022-00545-y Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTc5dc9eed392343428f8c59c856be5871/
- URN
urn:pkr-prod:CUTc5dc9eed392343428f8c59c856be5871
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.