The slamming pressure is decisive for the structure scantling of high speed vessels up to medium size. The linear wave model and long-crested heading sea condition are usually used for direct assessment of the design slamming pressure using computer codes for seakeeping calculation. The design experience has shown that the assessment result is uncertain and hardly useful without feed back experiences of similar vessels in service. A Monte-Carlo procedure based on a linear strip theory is used for probabilistic assessment of slamming pressure on a medium-sized V-shaped high speed vessel of about 70 m in length over all. Through demonstration of some calculation examples, the validity of the most used slamming pressure evaluation method by Ochi, originally for conventional ships is discussed, and its theoretical shortage is pointed out while applied for high speed vessels. The effects of bow waves, nonlinear waves, wave breaking and combined seas on slamming pressure are then investigated. The result shows considerably additional effects to the slamming pressure level in heading waves.
Issues in the assessment of design slamming pressure on high speed monohull vessels
Probleme bei der Bewertung des Auslegungs-Seeschlagdruckes an Hochgeschwindigkeits-Einrumpfschiffen
1998
12 Seiten, 9 Bilder, 5 Tabellen, 18 Quellen
Conference paper
English
Issues in the Assessment of Design Slamming Pressure on High Speed Monohull Vessels
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