Date of Publication:2015-01-01

Journal:船舶力学

Affiliation of Author(s):海洋科学与技术学院

Issue:7

Page Number:850-858

ISSN No.:1007-7294

Abstract:The jack-up drilling platforms belong to the typical flexible structures. As the complexity of the interactions between the ice and structures, the design code of the flexible ice-resistant structures is not based on the dynamic response analysis. Current design codes for ice-resist offshore structures mainly deal with the extreme force, not the dynamic ice loads. Based on the field monitoring data of ice-resist platforms in Bohai Liaodong Gulf, the significant ice-induced vibration not only causes significant cyclical stress of tube node but also great acceleration response, which can endanger the pipeline systems on the platform and discomfort the crew members. The risks induced by ice vibrations are more serious than the extreme static ice load. In this paper, based on the field monitoring and ice loads research, the main failure modes and evaluation methods for the flexible ice-resistant structure design are provided. Finally, the ice-resis-tant performance is analyzed by taking a jack-up platform in Bohai Sea as an example. This study providesa reasonable basis for the ice-resist concept design of the jack-up platforms in the cold regions.

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