Analysis of surge added mass of planing hulls by model experiment

ABSTRACT

The added mass is referred to as an extra mass of fluid accelerates with the body caused by body acceleration in the fluid. Surge added mass of ships is relatively low in comparison with their mass which does not have considerable influence on ship manoeuvrability. That is why less research have focused on the surge added mass. This research deals with the surge added mass of planing hulls by model experiment as well as approximates by quasi-analytical method. A benchmark test has been conducted for the surge added mass measurement of Series60 hull form. On that basis, test procedure and set-up have been concluded and verified for planing hulls. The results of model testing and approximate analytical method are compared. This study shows that the surge added mass coefficient of a planing craft may reach up to 10% of the craft mass.

KEYWORDS:

• Planing hulls
• surge
• added mass
• manoeuvrability
• experimental
• analytical

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes on contributors

Hamid Zeraatgar obtained PhD in ship hydrodynamics and he is associate professor of Amirkabir University of Technology. He has been lecturing and researching in AUT since 2000. His main research interests are ships and planing crafts hydrodynamics.

Aliasghar Moghaddas graduated from AUT in naval architecture with a master’s degree in 2017. He is a Phd candidate in AUT from 2018 and working on hydrodynamics. He has been working in National Iranian Marine Laboratory since 2012.

Kazem Sadati graduated from AUT in naval architecture with a master’s degree in 2015. Since 2016, he has been a PhD candidate in AUT and working on hydrodynamics. His Phd thesis is investigation on mathematical modelling of planing crafts manoeuvre based on experimental and numerical methods.