Forced response analysis of a transonic turbine using a free interface component mode synthesis method
2015 (English)In: 11th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2015, European Conference on Turbomachinery (ETC) , 2015Conference paper (Refereed)
Assessing forced response is crucial during the design phase of turbomachines. Since the analyses are computationally expensive and time-consuming when using full models, Reduced Order Models (ROM) are utilized to decrease the number of Degrees Of Freedom (DOF) and consequently analysis time and cost. The ROM used in the current analysis belongs to the component mode synthesis (CMS) method with a free-interface approach known as Craig-Chang. A transonic high pressure turbine is investigated featuring large ranges of disk and blade dominated modes depending in the Nodal Diameter (ND). The free-interface approach will be assessed in the disk and blade dominated regions with a detailed study of the frequencies and mode shapes. In addition, a forced response analysis within the blade dominated region is evaluated in the paper. Moreover, a study of the amount of modes required in the basis for the reduced order transformation matrix is presented.
Place, publisher, year, edition, pages
European Conference on Turbomachinery (ETC) , 2015.
Degrees of freedom (mechanics), Fluid dynamics, Linear transformations, Modal analysis, Structural analysis, Thermodynamics, Transonic aerodynamics, Turbines, Turbomachine blades, Turbomachinery, Component mode synthesis, Current analysis, Forced response analysis, Free-interface component mode synthesis, Number of degrees of freedom, Reduced order models, Transonic high pressure turbine, Transonic turbine, Turbine components
IdentifiersURN: urn:nbn:se:kth:diva-194737ScopusID: 2-s2.0-84983109414OAI: oai:DiVA.org:kth-194737DiVA: diva2:1047443
11th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2015, 23 March 2015 through 27 March 2015
QC 201611172016-11-172016-10-312016-11-17Bibliographically approved