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Windloads and Buildingaerodynamics

Samuelsson, Magnus (2007) VSM820
Structural Mechanics
Civil Engineering (M.Sc.Eng.)
Abstract
Today there exists standards which describes how wind-loads, statical and dynamical, can be treated for different kinds of buildings. In some cases
these standards are to coarse which might result in results that aren’t precise enough. This might be the case when structures interact with the wind and creates resonance phenomenons between the structure and the wind.
Accurate calculations of the airflow around structures and the fluid struc-
ture interaction can be performed with numerical methods such as the finite element method. One program that can be used to perform such calculations is LS-Dyna. In this master thesis a description of how such a model can be created is described. The results from the calculations are then compared to... (More)
Today there exists standards which describes how wind-loads, statical and dynamical, can be treated for different kinds of buildings. In some cases
these standards are to coarse which might result in results that aren’t precise enough. This might be the case when structures interact with the wind and creates resonance phenomenons between the structure and the wind.
Accurate calculations of the airflow around structures and the fluid struc-
ture interaction can be performed with numerical methods such as the finite element method. One program that can be used to perform such calculations is LS-Dyna. In this master thesis a description of how such a model can be created is described. The results from the calculations are then compared to known phenomenons such as vortex shedding. The results from the simulations show that vortex shedding appears at frequencies that gets closer to theoretical values as the element size gets smaller. The simulations also show that the structures in the simulations move, although these movements have not been evaluated.

In this master thesis a larger three dimensional model was created as
well. In this model the airflow around an enclosure for a telescope is studied. The calculations in these simulations were costly and any accurate results were not found. The simulation where performed as a test of a simulation of a large three-dimensional structure with a relatively complex geometry. (Less)
Please use this url to cite or link to this publication:
author
Samuelsson, Magnus
supervisor
organization
course
VSM820
year
type
H3 - Professional qualifications (4 Years - )
subject
report number
TVSM-5135
ISSN
0281-6679
language
English
id
3566783
date added to LUP
2013-08-05 12:04:29
date last changed
2013-10-07 12:19:58
@misc{3566783,
  abstract     = {Today there exists standards which describes how wind-loads, statical and dynamical, can be treated for different kinds of buildings. In some cases
these standards are to coarse which might result in results that aren’t precise enough. This might be the case when structures interact with the wind and creates resonance phenomenons between the structure and the wind.
Accurate calculations of the airflow around structures and the fluid struc-
ture interaction can be performed with numerical methods such as the finite element method. One program that can be used to perform such calculations is LS-Dyna. In this master thesis a description of how such a model can be created is described. The results from the calculations are then compared to known phenomenons such as vortex shedding. The results from the simulations show that vortex shedding appears at frequencies that gets closer to theoretical values as the element size gets smaller. The simulations also show that the structures in the simulations move, although these movements have not been evaluated.

In this master thesis a larger three dimensional model was created as
well. In this model the airflow around an enclosure for a telescope is studied. The calculations in these simulations were costly and any accurate results were not found. The simulation where performed as a test of a simulation of a large three-dimensional structure with a relatively complex geometry.},
  author       = {Samuelsson, Magnus},
  issn         = {0281-6679},
  language     = {eng},
  note         = {Student Paper},
  title        = {Windloads and Buildingaerodynamics},
  year         = {2007},
}