Experimental study of the pressure on the hulls of trimaran vessel from the viewpoint of the slamming phenomenon

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Mirzaaghanasab Gerdrodbary Rohollah; Khedmati Mohammad Reza; Akbari Vakilabadi Karim; Askarian Khoob Abolfath

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF MARINE TECHNOLOGY Year:2023 | Volume: | Issue: Page(s): 25-35

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Title

Experimental study of the pressure on the hulls of trimaran vessel from the viewpoint of the slamming phenomenon

Author(s)

Mirzaaghanasab Gerdrodbary Rohollah | Khedmati Mohammad Reza | Akbari Vakilabadi Karim | Askarian Khoob Abolfath | Issue Writer Certificate

Keywords

SlammingQ4

Trimaran vesselQ4

Maximum pressureQ4

Pressure DistributionQ4

Transverse DeckQ4

Abstract

Slamming is usually a combination of different loads on the vessel hull and is one of the main causes of failure and failure in the structure of vessels. The influence of Slamming compared to other loads from the sea waves is so significant that in some cases the vessels are severely damaged locally by structural damages. Failure to accurately estimate the influence of Slamming will result in improper design of the ship's structure, thereby weakening the ship's safety. In Trimaran vessels, the fluid force applied to the side hulls is transmitted to the main hull by a Transverse Deck. As a result, one of the most important parts of the structure of this vessel is the Transverse Deck structure, the design of which requires the calculation of the incoming wave forces. In this paper, the phenomenon of Slamming on the side hull and the Transverse Deck of the trimaran has been examined experimentally by measuring the pressure created by the collision of the model of Trimaran vessel with the water surface. The results showed that in bottom regions of Trimaran vessels, the pressure on bottom is increased going from stem towards stern. Also, the pressure on the Transverse Deck increases from the main hull to the side hulls. In the position of the shaft axis and the shaft post at the main hull, owing to the earlier impact of the stern of the main hull with the water surface compared to the side hulls, the pressure is higher than the other positions.

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