dc.contributor.author	Farmer, Anthony Lee	en
dc.contributor.committeechair	Plaut, Raymond H.	en
dc.contributor.committeemember	Rojiani, Kamal B.	en
dc.contributor.committeemember	Holzer, Siegfried M.	en
dc.contributor.department	Civil Engineering	en
dc.date.accessioned	2014-03-14T20:48:31Z	en
dc.date.adate	1999-11-30	en
dc.date.available	2014-03-14T20:48:31Z	en
dc.date.issued	1999-11-18	en
dc.date.rdate	2000-11-30	en
dc.date.sdate	1999-11-29	en
dc.description.abstract	A two-dimensional, nonlinear dynamic analysis is conducted on a moored breakwater configuration to investigate snap loads in mooring lines. Breakwaters are structures used to attenuate or eliminate waves and protect shorelines, harbors, and other natural and man-made marine structures from wave damage. The breakwater in this investigation is modeled both as a point mass and as a rigid body. Both models are subjected to free undamped motions and forced undamped wave motion. Energy is dissipated through the use of a coefficient of restitution applied when a mooring line becomes taut (i.e., reaches its natural length). The mooring line is modeled as an inextensible cable with no axial or bending resistance when slack. Snap loading arises when a mooring line transitions suddenly from a slack condition to a taut condition. The analysis was conducted on a breakwater configured upside down and hanging by two mooring lines. The length of the mooring lines, coefficient of restitution, size and shape of the breakwater, initial position of the breakwater, amplitude of wave forcing, ratio of vertical to horizontal forcing, and frequency of forcing were all varied in the analysis. The results show that the rotations of the rigid body and the wave forcing have a significant role in the analysis, indicating that a rigid-body model for a moored breakwater under wave forcing is the more accurate model.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-112999-093701	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-112999-093701/	en
dc.identifier.uri	http://hdl.handle.net/10919/35854	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	References.pdf	en
dc.relation.haspart	Introduction.pdf	en
dc.relation.haspart	Chapter7.pdf	en
dc.relation.haspart	Chapter6.pdf	en
dc.relation.haspart	Chapter5.pdf	en
dc.relation.haspart	Chapter4.pdf	en
dc.relation.haspart	Chapter3.pdf	en
dc.relation.haspart	Chapter2.pdf	en
dc.relation.haspart	Chapter1.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	nonlinear dynamics	en
dc.subject	vibration	en
dc.subject	snap loading	en
dc.subject	breakwater	en
dc.subject	mooring lines	en
dc.title	Investigation Into Snap Loading of Cables Used in Moored Breakwaters	en
dc.type	Thesis	en
thesis.degree.discipline	Civil Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Investigation Into Snap Loading of Cables Used in Moored Breakwaters

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