000015634 001__ 15634
000015634 005__ 20161115135325.0
000015634 04107 $$aeng
000015634 046__ $$k2013-06-12
000015634 100__ $$aMorsbol, J.
000015634 24500 $$aModelling Tool for Elastic Wave Guide Properties of Flexible Pipes

000015634 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015634 260__ $$bNational Technical University of Athens, 2013
000015634 506__ $$arestricted
000015634 520__ $$2eng$$aWave guide modelling of flexible pipes has a wide range of applications. Risers used in the oil and gas industry, suffering under internal and external flow induced vibrations, hydraulic hoses acting as structural wave guides in power transmission systems, and also diagnosis of cardiovascular diseases in the larger blood vessels are just some of the areas. Depending upon the stiffness properties of the pipe and the frequency range under considerations different modelling techniques can be applied. At sufficiently low frequency relative to the stiffness of the pipe a one-dimensional beam model may be sufficient. At higher frequencies the plane cross-section assumptions of e.g. a Timoshenko beam become too restrictive whereas a two-dimensional shell model of the pipe wall still may be valid. Then, at even higher frequencies, deformations modes across the thickness of the pipe wall need to be taken into considerations and a full-blown three-dimensional elasticity model is then needed. In this work an analytical shell model of the wave guide properties of a flexible pipe is carried out. The flexible pipe is modelled as a thin walled constantly curved cylinder and the dispersion relation between the frequency and wave number associated with the waves along the length of the pipe is determined. The dispersion relation of this model is compared to a corresponding Timoshenko beam model and a wave finite element model modelled with solid elements. This provides a tool for choosing between the modelling techniques described above when modelling flexible pipes.

000015634 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015634 653__ $$a

000015634 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015634 720__ $$aMorsbol, J.$$iSorokin, S.
000015634 8560_ $$ffischerc@itam.cas.cz
000015634 8564_ $$s171465$$uhttps://invenio.itam.cas.cz/record/15634/files/1177.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 28 PERIODICITY EFFECTS AND PERIODICITY-BASED METHODS IN VIBRO-ACOUSTICS AND STRUCTURAL DYNAMICS
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000015634 962__ $$r15525
000015634 980__ $$aPAPER