The quasi-steady analytical approach was used to develop a mathematical model for investigating instability using a rotatable five cylinder cluster with one "movable" cylinder. In this model, the important time retardation factor is taken into account. First, the equations of motion for the "movable" cylinder were written in dimensional form, and then non-dimensionalized and written in the final matrix form. Secondly, the force coefficients and their spacial derivatives with respect to cross-flow and in-flow displacements were measured on the "movable" cylinder. Also, the current direction was measured and the approach velocity was calculated. Finally, using this model and the experimental input data, the critical flow velocity for the onset of fluidelastic instability was calculated using a computer program developed for this purpose. / It is shown that, depending on the current direction, riser clusters may suffer from fluidelastic instability. The theoretical findings are in good agreement with experimental data. (Abstract shortened by UMI.)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.61097 |
| Date | January 1991 |
| Creators | Al-Jabir, A. A. (Abdul-Malik) |
| Contributors | Paidoussis, M. P. (advisor), Price, S. J. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Mechanical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001275448, proquestno: AAIMM74700, Theses scanned by UMI/ProQuest. |
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