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Numerical investigation of an unbalanced rotor system with bearing clearance
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-2342-1647
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0001-6016-6342
2003 (English)In: Chaos, Solitons & Fractals, ISSN 0960-0779, E-ISSN 1873-2887, Vol. 18, no 4, p. 653-664Article in journal (Refereed) Published
Abstract [en]

The nonlinear vibrations of a rotor system with bearing clearance are considered. The model consists of an unbalanced shaft with two d.o.f connected to a nonrotating massless housing by linear springs and dashpots. The clearance occurs when the housing (modelled as a ring) has a radius less than the stator. The behaviour of this system has been investigated with the use of time histories, Poincare maps, bifurcation diagrams, Lyapunov exponents, phase portraits, cell mapping and design space. Numerical simulations have achieved these results. The main objective was to find possible causes of failure in machines containing this type of clearance. The existence of subharmonic, quasi-periodic or even possible chaotic motion has been found. It is shown that these motions may give raise to bouncing modes, which results in high bearing forces and hence can be a possible cause of failure

Place, publisher, year, edition, pages
2003. Vol. 18, no 4, p. 653-664
National Category
Other Mechanical Engineering Applied Mechanics
Research subject
Computer Aided Design; Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-10177DOI: 10.1016/S0960-0779(03)00025-0ISI: 000183810200002Scopus ID: 2-s2.0-0037902341Local ID: 8ef35800-6f79-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-10177DiVA, id: diva2:983117
Note
Validerad; 2003; 20060921 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Karlberg, MagnusAidanpää, Jan-Olov

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