PDF] Roll reduction of ships using anti-roll n-tanks

Roll reduction of ships above about 6kts can be effectively achieved using active fin stabilizers but at slow or zero speeds another method is required. This paper considers a tank configuration which we call “n-tank”, also know as free flooding tanks. The port and starboard legs are open to the sea and there is no internal water connection between the two tanks but there may be an air connection at the top of the tanks. The configuration of “n-tanks” makes them particularly useful for application to multi-hull craft. A requirement is developing for high speed multihulls to have good sea keeping at low speeds. The paper commences with a brief history of the development of roll stabilization tanks, a mathematical model of triangular prismatic n-tanks is then derived and the results of simulations on a representative trimaran are presented. Five cases are considered starting with the base line of passive n-tanks with fixed inlet ports. Different controls of the opening port and use of compressed air to assist emptying the tanks is then investigated.

PDF] Roll reduction of ships using anti-roll n-tanks

PDF] Roll reduction of ships using anti-roll n-tanks

PDF] Roll reduction of ships using anti-roll n-tanks

PDF] Roll reduction of ships using anti-roll n-tanks

PDF] Roll reduction of ships using anti-roll n-tanks

PDF] Roll reduction of ships using anti-roll n-tanks

PDF] Roll reduction of ships using anti-roll n-tanks