Investigation of aerodynamic instability of a thin plate

Irina Lantsova,Irina Afanasyeva,S Jemioło,M Gajewski,A Zbiciak,M Krzemiński,M Mitew-Czajewska

doi:10.1051/matecconf/201711700099

Abstract

This paper is devoted to methods and principles of investigation of aerodynamic instability of structures. Object of interest is a thin plate. This is an important aspect of the design of large-span structures, bridges and other structures sensitive to wind loads. As Russian standards and Eurocode obliges to check the conditions for the occurrence of galloping, divergence and flutter for a certain class of structures. Modern computing facilities allow to calculate aerodynamic coefficients with high accuracy.

Highlights

The relevance of this work is determined by the need to take into account the sensitivity of structures to wind loads that produces aeroelastic vibrations, which can lead to collapse of the structure
Experimental and numerical techniques that allow to assess the possibility of the occurrence of such aerodynamic instability effects as vortex shedding, galloping or divergence need to be improved [1, 2]
The purpose of this study is an identification of the occurrence of such aerodynamic instability effects for the interesting object, such as vortex shedding, galloping or divergence

Summary

Introduction

The relevance of this work is determined by the need to take into account the sensitivity of structures to wind loads that produces aeroelastic vibrations, which can lead to collapse of the structure. This type of structures includes the large-span structures, large-span bridges, thin-walled cooling towers, high-rise buildings, roofs of long-span stadiums and so on. Experimental and numerical techniques that allow to assess the possibility of the occurrence of such aerodynamic instability effects as vortex shedding, galloping or divergence need to be improved [1, 2]. Nowadays the modern numerical methods and computational tools let to perform detailed simulations of the aeroelastic behavior of structures and fluid flow around it, but it is necessary to verify and validate them

Problem statement

Results

Galloping

Vortex shedding

Divergence and Flutter

Conclusions