Date of Publication:2018-01-01

Journal:船舶力学

Affiliation of Author(s):海洋科学与技术学院

Volume:22

Issue:5

Page Number:615-627

ISSN No.:1007-7294

Abstract:The offshore wind turbine foundation belongs to typical slender structure. Due to the complexity of the interaction between ice and ice-resistant slender structure,the structural design based on analysis of the response to dynamic ice force has not been formed for a long time. Most of the ice-resistant structure design is based on the extreme load, only considering the largest static ice force or the maximum negative moment. Based on the many years' monitoring in the Bohai Bay, it was found that the risks of strong ice-induced vibration of flexible structure outweigh the overall security of the structure under extreme static ice load. In order to define the ice resistance of the offshore wind turbine foundation in the ice region and the rationality of the ice-resistant design,in this paper,based on the research results of observation of ice and the interaction between ice and structure, it is clear that the ice load model is suitable for the offshore wind power and the structural dynamic characteristics.And the main failure modes and evaluation methods for the flexible ice-resistant structure design are provided. Finally, the ice-resistant performance is analyzed by tak-ing a new wind turbine foundation in Bohai Sea as an example.This study could provide a reasonable basis on the ice-resist concept design and security assurance for the wind turbine foundations in the cold regions.

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