Header

Shop : Details

Shop
Details
978-3-8440-2479-1
49,80 €
ISBN 978-3-8440-2479-1
Softcover
250 pages
375 g
25 x 17,6 cm
English
Thesis
April 2014
Arno Kirch
Alleviation of the Response of Slender Bridges to Wind Action Using Different Types of Controlled Actuators
The theoretical work describes how the dynamic characteristics of slender bridges under wind action can be improved through the use of controlled actuators. First, models for the aerodynamic forces are introduced that are based on linear time-invariant transfer elements. Rational function approximations of the aerodynamic transfer functions allow for force representations with state-space models. Two matrix-based rational function approaches are applied. Their suitability is limited for bridge cross sections. For an evaluation of the approximation quality, several parameter studies are conducted. In the next step, a cable-stayed bridge is introduced as an example of a slender bridge structure. Two different spatial discretisations with element-wise and global shape functions are applied for modelling this bridge. The aeroelastic system as the combination of aerodynamic forces and the bridge structure is described in terms of a state-space model. Stability and transfer behaviour, the most important characteristics of the aeroelastic system, are theoretically investigated. Emphasis is laid on the effect of the rational function approximations on the quality of the results. Reaction wheels, control moment gyroscopes, and aerodynamically effective flaps are employed as actuators. The state-space model of the aeroelastic system is extended in order to incorporate these devices. When the actuator motions are controlled in a closed loop, the system response to disturbances can be attenuated. A particular focus of the work is on finding fundamental limits for the stabilisation of the actuator-extended aeroelastic systems. Furthermore, the performance of the controlled system in a turbulent wind field is compared for the different types of actuators. In the last steps, the effect of state observers is investigated, a disturbance feedforward is analysed, and the feasibility of an integral control is explored.
Schriftenreihe des Instituts für Stahlbau
Edited by Univ.-Prof. Dr. sc. techn. Klaus Thiele, Braunschweig
Volume 1
Available online documents for this title
You need Adobe Reader, to view these files. Here you will find a little help and information for downloading the PDF files.
Please note that the online documents cannot be printed or edited.
Please also see further information at: Help and Information.
 
 DocumentAbstract 
 TypePDF 
 Costsfree 
 ActionDownloadDownload the file 
     
 
 DocumentDocument 
 TypePDF 
 Costs37,35 € 
 ActionDownloadPurchase in obligation and download the file 
     
 
 DocumentTable of contents 
 TypePDF 
 Costsfree 
 ActionDownloadDownload the file 
     
User settings for registered online customers (online documents)
You can change your address details here and access documents you have already ordered.
User
Not logged in
Export of bibliographic data
Shaker Verlag GmbH
Am Langen Graben 15a
52353 Düren
Germany
  +49 2421 99011 9
Mon. - Thurs. 8:00 a.m. to 4:00 p.m.
Fri. 8:00 a.m. to 3:00 p.m.
Contact us. We will be happy to help you.
Captcha
Social Media