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dc.contributor.authorReda, A.
dc.contributor.authorForbes, Gareth
dc.contributor.editorDavid J. Mee and Ian D. M, Hillock
dc.identifier.citationReda, Ahmed M. and Forbes, Gareth L. 2011. The Effect of Distribution for a Moving Force, in Mee, D.J. and Hillock, I.D.M. (ed), Proceedings of Acoustics 2011, Nov 2 2011, pp. 1-9. Gold Coast, QLD: The Australian Acoustical Society.

Many types of slender or thin walled structures experience forces which traverse across them. For example: vehicles passing over a bridge, overhead crane operations and liquid "slug" movement in spanning pipelines. This moving force can initiate a large dynamic stress within the structure and is often important for assessing structural fatigue. For many of these force/structure scenarios, modelling of the force as a concentrated point force would be an adequate simplifying approximation. In some cases, however, it may not be appropriate to simplify the distributed force into a single point force. For instance, slug lengths in pipelines can be significant in relation to span lengths. There is currently no guidance in the literature regarding the distribution effect of the force on the response of a structure under a moving force. This paper investigates the dynamic response of an elastic, simply supported beam under the influence of a moving distributed force, with varying distribution to span length ratios. In addition, it examines the speed of the traversing force, which is also highly influential on the dynamic response of the beam. This investigation is undertaken using an explicit transient dynamic finite element formulation of a simply supported beam. Guidelines are provided to discriminate between those scenarios when it is appropriate to simplify a distributed moving force as a concentrated force, and those when it must be modelled as the original distributed force.

dc.publisherAustralian Acoustical Society
dc.subjectMoving force
dc.subjectpipeline slug flow
dc.titleThe Effect of Distribution for a Moving Force
dc.typeConference Paper
dcterms.source.titleProceedings of Acoustics 2011
dcterms.source.seriesProceedings of Acoustics 2011
dcterms.source.isbn978 0 9757855 8 4
dcterms.source.conferenceAcoustics 2011 (Breaking new ground)
dcterms.source.conference-start-dateNov 2 2011
dcterms.source.conferencelocationGold Coast, Queensland, Australia
dcterms.source.placeQueensland, Australia
curtin.departmentDepartment of Mechanical Engineering
curtin.accessStatusOpen access

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