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Study on Vibrations induced by Parametric Excitations on Strings
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
2007 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesis
Abstract [en]

The present thesis work studies the parametrically excited vibrations on bridge stay cables when the natural frequency of the bridge tower is half of the resonance frequency of the cable. This condition is found at the longest stay cables of the Øresund Bridge. Experimental and numerical analysis is carried out based on a simplified scaled model (1:200) of this bridge, replacing the cables by strings made of steel. When parametrically excited vibrations are studied, certain relations between resonance frequencies of bridge tower and cable lead to high vibration levels. The most critical relation is when the tower frequency is double the cable frequency. The case studied here, where the tower frequency is half of the cable frequency, shows to be less severe.

Place, publisher, year, edition, pages
2007. , 64 p.
Keyword [en]
Vibrations, Parametric Excitations, Strings, Stay Cables, Modal Analysis
National Category
Mechanical Engineering
URN: urn:nbn:se:bth-5398Local ID: diva2:832778
ingmsc.armandoleon@gmail.comAvailable from: 2015-04-22 Created: 2007-06-12 Last updated: 2015-06-30Bibliographically approved

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