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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as:
The contents may be of a pure scientific or of an applied scientific nature.
Article Type: Research Article
Abstract: A second-order approximate solution is obtained for the nonlinear established harmonic roll of a ship in regular beam seas. The perturbation solutions are compared with solutions obtained by numerically solving the nonlinear governing equations. The peak roll angle and corresponding frequency predicted by the second-order expansion are found to be in closer agreement with the numerical simulation than those predicted by the first-order expansion. Increasing the wave slope is found to increase the peak roll angle, increase the resonance width, and bend the response curves to lower frequencies. Decreasing the damping coefficients is found to increase the peak roll angle, …decrease the resonance width, and also bend the response curves. Increasing the amplitude of the wave slope beyond a threshold value results in some unstable harmonic responses and a cascade of bifurcations. The roll responses experience either period doubling or period tripling bifurcations leading to chaotic behavior. A Floquet analysis is used to predict the occurrence of these bifurcations. The perturbation expansion predicts fairly well the established harmonic oscillations as well as the start of the period multiplying bifurcations. Show more
Citation: International Shipbuilding Progress, vol. 33, no. 379, pp. 40-49, 1986
Authors: Han, S.H.
Article Type: Research Article
Abstract: As the design of Ro-Ro ships is rather complex and different from the design of conventional ship types, a new computerized design model is desired. In addition, there have been many developments in computing technology. These developments, such as computer graphics, make it possible to develop an advanced model for ship design. Ship design procedures, problems in the design of Ro-Ro ships, and available computing methods have been studied. Two items are identified as necessary for the conceptual design of Ro-Ro ships. One is the checking of the loading conditions, and the other is the handling of internal geometry. …A computerized model for the conceptual design of Ro-Ro ships with 2-decks has been developed. It has a graphical presentation module which shows the midship section and deck arrangements of the ship with cargoes. The first international (ISO) standard in computer graphics – GKS – is used for the module. Show more
Citation: International Shipbuilding Progress, vol. 33, no. 379, pp. 50-55, 1986
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