On efficient and adaptive modelling of friction damping in bladed disks

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Fältnamn	Indikatorer	Metadata
000		04239nam a2200505 4500
001		oai:DiVA.org:kth-202978
003		SwePub
008		170310s2017 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
020		a 9789177292920q print
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2029782 URI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a vet2 swepub-contenttype
072	7	a dok2 swepub-publicationtype
100	1	a Afzal, Mohammad,d 1987-u KTH,MWL Marcus Wallenberg Laboratoriet4 aut0 (Swepub:kth)u16pzxzu
245	1 0	a On efficient and adaptive modelling of friction damping in bladed disks
264	1	a Stockholm :b KTH Royal Institute of Technology,c 2017
300		a 70 s.
338		a electronic2 rdacarrier
500		a QC 20170310
520		a This work focuses on efficient modelling and adaptive control of friction damping in bladed disks. To efficiently simulate the friction contact, a full-3D time-discrete contact model is reformulated and an analytical expression for the Jacobian matrix is derived that reduces the computation time drastically with respect to the classical finite difference method. The developed numerical solver is applied on bladed disks with shroud contact and the advantage of full-3D contact model compared to a quasi-3D contact model is presented. The developed numerical solver is also applied on bladed disks with strip damper and multiple friction contacts and obtained results are discussed. Furthermore, presence of higher harmonics in the nonlinear contact forces is analyzed and their effect on the excitation of the different nodal diameters of the bladed disk are systematically presented. The main parameters that influence the effectiveness of friction damping in bladed disks are engine excitation order, contact stiffnesses, friction coefficient, relative motion at the friction interface and the normal contact load. Due to variation in these parameters during operation, the obtained friction damping in practice may differ from the optimum value. Therefore, to control the normal load adaptively that will lead to an optimum damping in the system despite these variations, use of magnetostrictive actuator is proposed. The magnetostrictive material that develops an internal strain under the influence of an external magnetic field is employed to increase and decrease the normal contact load. A linearized model of the magnetostrictive actuator is used to characterize the magnetoelastic behavior of the actuator. A nonlinear static contact analysis of the bladed disk reveals that a change of normal load more than 700 N can be achieved using a reasonable size of the actuator. This will give a very good control on friction damping once applied in practice.
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Teknisk mekanik0 (SwePub)203012 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Applied Mechanics0 (SwePub)203012 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Energiteknik0 (SwePub)203042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Energy Engineering0 (SwePub)203042 hsv//eng
653		a High cycle fatigue
653		a Friction contact
653		a Jacobian matrix
653		a Shroud contact
653		a Strip damper
653		a Multiharmonic balance method
653		a Contact stiffness
653		a Cyclic symmetry
653		a Nodal diameter
653		a Magnetostrictive actuator
653		a Magnetic field
653		a Engineering Mechanics
653		a Teknisk mekanik
700	1	a Kari, Leif,c Professoru KTH,MWL Marcus Wallenberg Laboratoriet,Royal Institure of Technology4 ths0 (Swepub:kth)u1et0yya
700	1	a Lopez Arteaga, Ines,c Professoru KTH,MWL Marcus Wallenberg Laboratoriet,Eindhoven University of Technology4 ths0 (Swepub:kth)u1gy0h8d
700	1	a Gola, Muzio M,c Professoru Politecnico di Torino - Turin Technical University4 opn
710	2	a KTHb MWL Marcus Wallenberg Laboratoriet4 org
856	4	u https://kth.diva-portal.org/smash/get/diva2:1080367/FULLTEXT01.pdfx primaryx Raw objecty fulltext
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202978

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Av författaren/redakt...: Afzal, Mohammad, ...; Kari, Leif, Prof ...; Lopez Arteaga, I ...; Gola, Muzio M, P ...

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Teknisk mekanik

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