Publication detail

Galloping štíhlých válcových konstrukčních prvků s vlivem námrazy

NEVAŘIL, A.

Original Title

Galloping štíhlých válcových konstrukčních prvků s vlivem námrazy

English Title

Galloping of sledner line-like cynindrical structures under icing conditions.

Type

conference paper

Language

Czech

Original Abstract

In the presented article is outlined analysis of galloping of slender cylindrical structural elements. Transverse oscillations of the cross-section known as a galloping are referenced and a quasi-static approach of its theoretic solution is adopted. Basic assumptions for arise of these vibration produced instabilities are named according to the European Standard ENV 1991. It is shown that the instable oscillations develop in case of a fulfilled Glawert - Den Hartog criterion. The description of the numerical model assembled in the ANSYS/Flotran computer code is given. Some of the numerically obtained data, e.g. the flow trace, are presented. Aerodynamic instability of a galloping-like type can be analyzed using quasi-static approach.

English abstract

In the presented srticle is outlined analysis of galloping of slender cylindrical structural elements. Transverse oscillations of the cross-section known as a galloping are referenced and a quasi-static approach of its theoretic solution is adopted. Basic assumptions for arise of these vibration produced instabilities are named according to the European Standard ENV 1991. It is shown that the instable oscillations develop in case of a fulfilled Glawert - Den Hartog criterion. The description of the numerical model assembled in the ANSYS/Flotran computer code is given. Some of the numerically obtained data, e.g. the flow trace, are presented. Aerodynamic instability of a galloping-like type can be analyzed using quasi-static approach.

Key words in English

Galloping, analysis, structural elements, ANSYS

Authors

NEVAŘIL, A.

RIV year

2006

Released

19. 10. 2006

Location

Bratislava, SR

ISBN

80-227-2479-3

Book

New trends in statics and dynamics of buildings

Pages from

215

Pages to

218

Pages count

4

BibTex

@inproceedings{BUT24764,
  author="Aleš {Nevařil}",
  title="Galloping štíhlých válcových konstrukčních prvků s vlivem námrazy",
  booktitle="New trends in statics and dynamics of buildings",
  year="2006",
  pages="215--218",
  address="Bratislava, SR",
  isbn="80-227-2479-3"
}