Active nozzle control and integrated design optimization of a beam subject to fluid-dynamic forces.
1999 (English)In: Journal of Fluids and Structures, ISSN 0889-9746, E-ISSN 1095-8622, Vol. 13, no 2, 269-287 p.Article in journal (Refereed) Published
Active nozzle control is used to improve the stability of a beam subject to forces induced by fluid flow through attached pipes. The control system has a significant effect on the structural stability, making both flutter and divergence type of instabilities possible. The stability analysis is carried out using a state-variable approach based on a finite element formulation of the structural dynamics. The simultaneous design of the control system and the beam shape minimizing structural mass is performed using numerical optimization. The inclusion of the control system in the optimization gives a considerable reduction of the structural mass but results in an optimal design which is very sensitive to imperfections. Using a simple model of the control system uncertainties, a more robust design is obtained by solving a modified optimization problem. Throughout the study, the theoretical findings are verified by experiments.
Place, publisher, year, edition, pages
1999. Vol. 13, no 2, 269-287 p.
IdentifiersURN: urn:nbn:se:kth:diva-12426DOI: 10.1006/jfls.1998.0196ISI: 000079725500006OAI: oai:DiVA.org:kth-12426DiVA: diva2:311339
QC 201004212010-04-212010-04-212011-02-07Bibliographically approved