... conventional ships, icebreakers are subject to additional dynamic loads arising from interaction with ice. Because icebreaker hull forms are generally influenced by unique performance requirements, engineering past experiences, production feasibility, and risk mitigation during operation, early design...

.... Capability to perform maneuvers in ice are a function of many design factors which may directly or indirectly influence one another and are integral to the design spiral. Initial designation of design features which strongly affect ice maneuverability begins with a thorough understanding of the Icebreaker’s...

...’ relatively small amount of icebreakers’ capability to perform assistances in a safe and efficient manner. For the winter navigation system to work efficiently, high assistance speeds are necessary to release icebreakers from their previous assistance task to their next one. icebreaker climate change...

... This paper provides the results of model tests in ice to evaluate the performance of the USCG Mackinaw Icebreaker which equipped with two podded propulsors and compares with the data obtained from the full-scale ice trials. The objective of this collaborative model test program between the NRC...

...1Propulsion Systems for Subarctic and Polar Icebreakers Samuli Hanninen (M Pirjo Maattanen (V Torsten Heideman (V *) ABB Inc. Marine and Ports, 3700 W Sam Houston Parkway S, Houston, TX 77042, USA ABB OY Marine and Ports, Merenkulkijankatu 1, 00981 Helsinki, Finland KEY WORDS: Azimuth thruster...

... such as (Nayfeh, 1983). RESULTS Example frequency response plots were developed in (Clippinger, 2005) using the method of multiple time scales. Here these techniques are applied to two example hulls: a fictional cargo vessel of original design, and the US Coast Guard Icebreaker Polar Star (WAGB 10). Both hulls...

... The United States Coast Guard (USCG) Great Lakes Icebreaking Capability Replacement Project (GLIB) is a major acquisition program chartered to maintain heavy icebreaking on the Great Lakes. The state-of-the-art icebreaker being constructed under this program will replace the USCGC MACKINAW (WAGB...