Wetdeck slamming loads on a developed catamaran hullform – experimental investigation. (4th July 2017)

• Record Type: Journal Article
• Authors: Swidan, Ahmed; Thomas, Giles; Penesis, Irene; Ranmuthugala, Dev; Amin, Walid; Allen, Tom; Battley, Mark
• Is Part Of: Ships and offshore structures. Volume 12:Number 5(2017)
• Page Start: 653
• Page End: 661
• Publication Date: 2017-07-04
• Subjects: catamaran -- water impact -- wetdeck slam -- hydrodynamic loads -- slamming force -- pressure distribution; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2016.1194555
• Languages: English
• ISSNs: 1744-5302

Abstract

ABSTRACT: Catamaran wetdeck slamming has been experimentally investigated using a servo hydraulic slam testing system. A series of controlled-speed water impacts was undertaken on a rigid catamaran bow section with two interchangeable centrebows. Entry into the body of water was at two fixed trim angles: 0° and 5°. The vertical velocity was varied from 3 to 5 m/s in 0.5 m/s increments. This study presents a new dataset of pressure distributions and slam forces on the arched wetdeck structure of catamaran vessels. The relationships between the peak force magnitudes, relative impact angle and vertical velocity are observed, with a small reduction in slam force for an amended centrebow. Limited pressure measurements along the archway were not found to be representative of wetdeck slamming loads.