| An Observational Array for High-Resolution, Year-Round Measurements of Volume, Freshwater, and Ice Flux Variability in Davis Strait: Cruise Report for R/V Knorr 179-05, 22 September-4 October 2004 |
NOV 2004 |
59 pages |
| Authors:
Craig M. Lee; Brian Petrie; Jason I. Gobat; Victor Soukhovtsev; James Abriel; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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 | As part of the Freshwater Initiative sponsored by the National Science Foundation Office of Polar Programs, a team of scientists from the Applied Physics Laboratory of the university of Washington and the Bedford Institute of Oceanography are investigating freshwater exchange through Davis Strait. This 300-km-wide strait sits between Baffin Island and the west coast of Greenland and acts as the gateway for waters passing between the Canadian Arctic Archipelago and ... |
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| Generalized-alpha Time Integration Solutions for Hanging Chain Dynamics |
JUN 2002 |
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| Authors:
Jason I. Gobat; Mark A. Grosenbaugh; Michael S. Triantofyllou; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF PHYSICAL OCEANOGRAPHY
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 | In this paper, we study numerically the two and three-dimensional nonlinear dynamic response of a chain hanging under its own weight. Previous authors have employed the box method, a finite-difference scheme popular in cable dynamics problem, for this purpose. The box method has significant stability problems, however, and thus is not well suited to that highly nonlinear problem. We illustrate these stability problems and propose a new time integration procedure ... |
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| A Compact Coastal Ocean Observing System for Kernel Blitz 2001 |
DEC 2001 |
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| Authors:
Jason I. Gobat; Robert A. Weller; Bryan S. Way; Jeffrey Lord; Mark Pritchard; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| In this report we describe a compact, easily deployed, moored system for oceanographic and meteorological observations in the coastal ocean. The system consists of a surface and subsurface mooring pair deployed adjacent to one another. Compared to a single catenary surface mooring, this arrangement allows the entire water column to be instrumented. All of the instruments in the system log high resolution time series data. Additionally, the mooring line instruments ... |
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| WHOI Cable v2.0: Time Domain Numerical Simulation of Moored and Towed Oceanographic Systems |
JUL 2000 |
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| Authors:
Jason I. Gobat; Mark A. Grosenbaugh; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| This report describes version 2.0 of a numerical program for analyzing the statics and dynamics of cable structures commonly encountered in oceanographic engineering practice. The numerical program, WHOI Cable, features a nonlinear solver that includes the effects of geometric and material nonlinearities, bending stiffness for seamless modeling of slack cables, and a model for the interaction of cable segments with the seafloor. The program ... |
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| The Dynamics of Geometrically Compliant Mooring Systems |
JUN 2000 |
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| Authors:
Jason I. Gobat; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| Geometrically compliant mooring systems that change their shape to accommodate deformations are common in oceanographic and offshore energy applications. This thesis describes a numerical program and experimental results which are used to develop an understanding of the dynamic response of these systems. A numerical program is described which uses the generalized-a method for temporal integration. Compared to other schemes, the generalized-a algorithm has the advantages of ... |
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| WHOI Cable: Time Domain Numerical Simulation of Moored and Towed Oceanographic Systems |
NOV 1997 |
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| Authors:
Jason I. Gobat; Mark A. Grosenbaugh; Michael S. Triantafyllou; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| This report presents a numerical framework for analyzing the statics and dynamics of cable structures commonly encountered in oceanographic engineering practice. The numerical program, WHOI Cable, features a nonlinear solver that includes the effects of geometric and material nonlinearities, bending stiffness for seamless modeling of slack cables, and a model for the interaction of cable segments with the seafloor. The program solves both surface and subsurface single-point mooring problems, systems ... |
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