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Analysis of intermediate support cable logging systems

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dc.contributor.advisor Good, James W.
dc.contributor.advisor Pyles, Marvin R.
dc.creator Charland, James W.
dc.date.accessioned 2012-04-17T18:57:30Z
dc.date.available 2012-04-17T18:57:30Z
dc.date.copyright 1997-04-21
dc.date.issued 1997-04-21
dc.identifier.uri http://hdl.handle.net/1957/28782
dc.description Graduation date: 1997 en_US
dc.description.abstract The forest products industry often uses intermediate-support cable logging systems to transport logs from the harvest site to a staging area. A method is presented to assist in the analysis and design of these cable systems. The method determines tensions in individual cables, forces on and stresses in the support trees, and the geometry of the system under load. Static equilibrium and cable length compatibility are used to generate a system of simultaneous equations. This system of coupled, non-linear algebraic equations is solved numerically using the Newton-Raphson algorithm. A good, automated initial guess for the unknown quantities, based on the physics of the problem, is provided. A model of an example intermediate support cable logging system is analyzed by the proposed approach and the resulting behavior discussed. The method includes the effects of catenary sag and elastic stretch in the cables, and elastic behavior in the support trees. Friction is ignored in the formulation. The catenary and elastic stretch methodologies for the cables are each demonstrated on a single cable span as well as on a demonstration cable system. The effect of the support tree flexibility and cable mass are found to be significant on the response of the cable logging system. The effects of elastic stretch in the cables is not found to be significant for the cable logging systems considered. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Logging, Skyline -- Evaluation en_US
dc.subject.lcsh Logging, Skyline -- Design en_US
dc.title Analysis of intermediate support cable logging systems en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Civil Engineering en_US
dc.degree.name Master of Science (M.S.) in Marine Resource Management
dc.degree.level Master's en_US
dc.degree.discipline Engineering en_US
dc.degree.discipline Oceanic and Atmospheric Sciences en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us

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