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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year two issues appear (in March and September). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as:
- Concept development
- General design of ships and offshore objects
- Ship and offshore structural design
- Hydro-mechanics and -dynamics
- Maritime engineering and machinery systems
- Production processes of all types of ships and other objects intended for marine use
- Production technology and material science
- Shipping science, economics, and all directly related subjects
- Ship operations
- Offshore and ocean engineering in relation to the marine environment
- Marine safety
- Efficiency, lifecycle, and environment
- Ice-related aspects for ships and offshore objects.
The contents of the papers may be of a fundamental or of an applied scientific nature and must be of the highest novelty and rigor.
Authors: Senjanović, Ivo | Rudan, Smiljko | Ljuština, Ana Maria
Article Type: Research Article
Abstract: This work describes the remedy for a misalignment at the joint of two segments of hemispherical heads in a bilobe cargo tank. The misalignment is the result of a relatively thin spherical shell and production difficulties. Measurements of out-of-roundness show a rather large deviation of meridional camber and variation of radius in the head cross-section plane. At the ends of the segments the spherical form changes into a conical one. As a result a peak occurs in the meridional generatrix, which causes high stress concentration. The cross-section of the hemisphere at the segment joint is reinforced with a ring in …order to overtake the bending moment caused by the variation of circular radius. The ring dimensions are determined based on an approximate consideration. Stress concentration at the segment joint is reduced by two additional rings connected with a set of bars in the meridional direction. Angular distance between the bars is specified in such a way that the strength criteria, i.e. stress and fatigue requirements according to the Classification Rules, are satisfied. Stress distribution in the actual imperfect and reinforced structure is determined by the finite element method. Total static plus dynamic tank pressure is taken into account. Show more
Keywords: LPG carrier, bilobe tank, hemispherical head, misalignment, reinforcement, strength, fatigue, finite element method
DOI: 10.3233/ISP-2008-0049
Citation: International Shipbuilding Progress, vol. 55, no. 4, pp. 253-279, 2008
Authors: Shahid, M. | Das, P.K.
Article Type: Research Article
Abstract: The Finite Element Methods has become a common tool for engineering analysis and design subsequent to phenomenal increase in computing power available even on laptop and personnel computers. Further, design optimization and reliability analysis techniques and methodologies needing a number of evaluations of design problem at hand are becoming accessible and affordable. This paper concerns to review various techniques and methods that may be used in Reliability Analysis (RA) based on Finite Element Methods (FEM). A review of reliability analysis tools available within the ANSYS commercial FEA software as well as that of STRUREL, the commercial RA software is carried …out. A simple portal frame structure analysis has been done using various methods, and the results are compared for computational cost and accuracy. Show more
Keywords: Reliability analysis, structures, FEM
DOI: 10.3233/ISP-2008-0050
Citation: International Shipbuilding Progress, vol. 55, no. 4, pp. 281-300, 2008
Authors: Hu, Li-Fen | Ma, Kun
Article Type: Research Article
Abstract: This paper attempts to present a genetic algorithm-based counter-flooding decision support system for survivability evaluation and decision support in shipboard flooding accident. The developed system is also thought to useful as a crew training one, which is composed of a model base, a database and a man–machine interaction system structurally. The model base is of paramount importance to the system, which comprises three sub-models: a damaged floating position calculation model, a loading condition calculation model and a counter-flooding scheme optimization model. In order to solve the optimal strategy model, genetic algorithm, which is developed with roulette wheel selection, one-point crossover …and mutation, is used to choose the set of counter-flooding tanks should be filled or evacuated in order to achieve an optimal response to a flooding accident. The proposed evolutionary strategy enhances the diversity of population and the capability of search for the global optimum, which accelerates the evolution process of algorithm. The computational results validate the effectiveness of genetic algorithm. Show more
Keywords: Genetic algorithm, counter-flooding, decision support system, evolutionary strategy
DOI: 10.3233/ISP-2008-0051
Citation: International Shipbuilding Progress, vol. 55, no. 4, pp. 301-315, 2008
Article Type: Other
Citation: International Shipbuilding Progress, vol. 55, no. 4, pp. 317-319, 2008
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