102,246 research outputs found
Chaplin, T A, VX57141
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/376664Surname: CHAPLIN
Given Name(s) or Initials: T A
Military Service Number or Last Known Location: VX57141
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 13954189652
Item: [2016.0049.08969] "Chaplin, T A, VX57141
Vortex-excited vibration of a circular cylinder in planar oscillating flow
No full textLaboratory investigation has been made for a comprehensive study of the dynamic transverse response of a circular cylinder in planar oscillating flow. The test cylinder, 0.03 m in diameter and 0.48 m in length, is mounted horizontally at the mid-point of the water depth and is supported flexibly by a spring in the transverse direction. The variations of the transverse response of the test cylinder with frequency ratio fd/fnw (fd : frequency of oscillatory incident flow; fnw: natural frequency of the test cylinder in still water) and Keulegan-Carpenter number, KC, as the function of typical combined
mass ratio-damping parameter, Scruton number Ksp, are obtained in the range of 4 < KC < 20 and 0 75 < Ksp < 14 5. The appearance of 2 types of peak in the amplitude of vortex-excited vibration, which occurs similarly in the vortex-excited vibration of a vertical circular cylinder in waves, is also recognized for the right value of typical Scruton number Ksp
Chaplin, T G (Thomas George), SX2098
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/376660Surname: CHAPLIN
Given Name(s) or Initials: T G (THOMAS GEORGE)
Military Service Number or Last Known Location: SX2098
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 10492189648
Item: [2016.0049.08965] "Chaplin, T G (Thomas George), SX2098
Non-linear run-up on a vertical cylinder surface-piercing cylinder
No full textThis paper presents and analyses results of experiments in which a vertical surface-piercing cylinder was driven with a horizontal motion in water initially at rest. Using a novel system of 112 water surface elevation gauges that were monitored almost simultaneously at high frequency, measurements were made of the run-up on the cylinder over a wide range of conditions. According to linear theory, the run-up is of the form . Non-linear components at temporal and spatial frequencies up to the 3rd harmonic were identified in the measurements, and in some of these, the coefficient of the leading term in a polynomial expansion in the amplitude of motion could be computed with reasonable confidence. Very successful comparisons are made with conventional linear potential theory. Some features of the free surface motion that are normally associated with higher order solutions were also computed from the first-order potential, and in some respects they were in good agreement with the measurements
Computation of non-linear wave reflections and transmissions from a submerged horizontal cylinder
No full textNonlinear irrotational 2-D wave-body interactions are investigated using an indirect Desingularised Boundary Integral Equation Method with fully nonlinear free-surface boundary conditions. A fully implicit multi-point method is used for the time-integration, and the model is applied to the interactions of regular waves with a horizontal circular cylinder. There has been no sign of saw-tooth instabilities. The incident waves are modelled explicitly, and efficient sponge layers are used to damp out the computed scattered waves at each end of the domain. Numerical convergence and mass and energy conservation are demonstrated. Excellent agreement is observed between the present results and those from experiments, analytical solutions and other numerical models. Particular attention is given to wave reflections in deep and finite water depths, and to some unexpected wave conditions on the lee side of the cylinder
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