STAB2007_Dynamic stability of flared and tumblehome hull forms in waves

Bassler, C.†, Peters, A., Campbell, B., Belknap, W., and McCue, L.S., "Dynamic stability of flared and tumblehome hull forms in waves," 9th International Ship Stability Workshop, Hamburg, Germany, August, 2007.

Dynamic Stability of Flared and Tumblehome Hull Forms in Waves
Christopher Bassler, Seakeeping Division, Naval Surface Warfare Center, Carderock Division
Andrew Peters, QinetiQ
Bradley Campbell, Seakeeping Division, Naval Surface Warfare Center, Carderock Division
William Belknap, Seakeeping Division, Naval Surface Warfare Center, Carderock Division
Leigh McCue, Aerospace and Ocean Engineering, Virginia Tech

ABSTRACT
A numerical seakeeping code was used to examine the influence of wave conditions, ship initial conditions, and ship operating parameters on dynamic stability events in regular and irregular waves, and assess variations in ultimate stability for changes in the center of gravity (KG) for two hull forms, flared and tumblehome. The results of this investigation aid in better understanding the influence of increased KG over the life-cycle of the ship, the ramifications of error in KG measurements, the required safety factor or error band in operator guidance, and the sensitivity of these variations to hull form geometry.

KEYWORDS
dynamic stability; capsize; broach; surfride; tumblehome; KG

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