Spatial dynamics of tuned and mistuned bladed disks with cylindrical and wedge-shaped friction dampers

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dc.identifier.uri Panning, Lars Sextro, Walter Popp, Karl 2019-08-15T11:35:02Z 2019-08-15T11:35:02Z 2003
dc.identifier.citation Panning, Lars; Sextro, Walter; Popp, Karl: Spatial dynamics of tuned and mistuned bladed disks with cylindrical and wedge-shaped friction dampers. In: International Journal of Rotating Machinery 9 (2003), Nr. 3, S. 219-228. DOI:
dc.description.abstract One of the main tasks in the design of turbomachines like turbines, compressors, and fans is to increase the reliability and efficiency of the arrangement. Failures due to blade cracks are still a problem and have to be minimized with respect to costs and safety aspects. To reduce the maximum stresses, the blades can be coupled via friction damping devices such as underplatform dampers that are pressed onto the blade platforms by centrifugal forces. In this work, a method will be presented to optimize two different types of underplatform dampers in bladed disk applications with respect to a maximum damping effect. In practice, underplatform dampers with various geometric properties—cylindrical and wedge-shaped—are commonly used and lead to different contact conditions. A discretization of the contact areas between the blade platforms and the dampers is applied to be able to investigate nearly arbitrary contact geometries and spatial blade vibrations. The functionality of the two mentioned damper types has been studied in detail under different working conditions of the assembly. The advantages and disadvantages of both damper types are pointed out and strategies are presented to improve the damper design. In this context, the influence of mistuning effects is discussed in terms of statistical mistuning of the blades’ natural frequencies due to manufacturing tolerances as well as systematical mistuning due to a deliberate slight variation of the blade masses or geometries. eng
dc.language.iso eng
dc.publisher London : Hindawi Limited
dc.relation.ispartofseries International Journal of Rotating Machinery 9 (2003), Nr. 3
dc.rights CC BY 3.0 Unported
dc.subject Physics eng
dc.subject Control engineering eng
dc.subject Damper eng
dc.subject Vibration eng
dc.subject Cylinder eng
dc.subject Mistuning eng
dc.subject Centrifugal force eng
dc.subject Discretization eng
dc.subject Classical mechanics eng
dc.subject Wedge (mechanical device) eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Spatial dynamics of tuned and mistuned bladed disks with cylindrical and wedge-shaped friction dampers eng
dc.type Article
dc.type Text
dc.relation.issn 1023-621X
dc.bibliographicCitation.issue 3
dc.bibliographicCitation.volume 9
dc.bibliographicCitation.firstPage 219
dc.bibliographicCitation.lastPage 228
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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