Indexed by:Journal Papers

Date of Publication:2015-09-01

Journal:INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING

Included Journals:SCIE、EI、Scopus

Volume:25

Issue:3

Page Number:205-211

ISSN No.:1053-5381

Key Words:Ice-induced vibration; ice force period; sea ice breaking length; sea ice bending failure mode

Abstract:Ice-induced structural vibration mainly depends on the two coefficients of dynamic ice force: amplitude and period. According to the field measurement results obtained on two jacket structures installed with composite upward and downward ice-breaking cones in the Bohai Sea, the ice-induced structural vibrations vary with the ice acting position on the cone because cone shape (upward cone or downward cone and width) is one of the dominant influencing factors of the ice force period and sea ice breaking length. With the increase in the cone diameter, the ice failure mode on the upward cone was transformed from the wedge failure mode (with the long sea ice breaking length) into the plate failure mode (with the short sea ice breaking length). The plate failure mode was observed on the downward cone. When the small cone was selected, the significant difference in the dynamic ice force period was observed between upward and downward cones. When the wide cone was selected, the difference was not significant.