Author(s): Alfred Tunik; James W. St. John; Rubin Sheinberg; Peter V. Minnick
Linked Author(s):
Keywords: No Keywords
Abstract: Ice trials of the new USCGC Healy took place in April–May 2000 in Davis Strait in predominantly thick first-year ice. The ice trials included measurements of propulsion performance and ice loads on her bow shoulder, transom stern and rudder horns, with accompanying studies of ice conditions and ship’s trafficability. This paper is focused on ice loads on rudder horns -- a hull structure which has never been tested in ice. Both rudder horns were instrumented to measure ice-induced bending and torsional moments and shear forces at the supports. It was found that lateral ice loads are applied mainly within a narrow range of elevation slightly above the joint projected area of the rudder and rudder horn. Lateral and longitudinal moments showed no meaningful correlation. Bending moments have no meaningful correlations with torsional moments on rudder horn and rudderstock, which are also independent of each other. The results provide a basis for developing requirements for rudder horn design.
Year: 2002