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Limit state design and methodologies in ice class rules for ships and standards for Arctic offshore structures

机译：限制船舶的冰类规则和北极海上结构标准中的状态设计和方法

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Sea ice poses hazards to ships and offshore structures which create challenges for designers. Designers have to take into account the ice actions resulting from the various ice conditions, interactions and operational scenarios which may occur during the lifetime of structures. In this paper the methodologies used in ship and offshore structure standards, such as the Finnish Swedish Ice Class Rules, International Association of Classification Societies Polar Class rules and ISO 19906, are considered with respect to Limit State Design principles and design air temperature definitions. The paper presents an overview of the design approach used in these standards and especially the criteria for the structural limit used. Case study examples based on ship measurements in the Baltic, as well as design air temperature data from the Russian Arctic, are used to highlight the different approaches and their implementation. The analysis shows clearly that explicit design ice action and structural limit are required for the rational basis in the future development of Limit State definitions in standards accounting for ice actions. (C) 2017 Elsevier Ltd. All rights reserved.
机译：海冰对船舶和近海结构构成危害，给设计人员带来挑战。设计人员必须考虑由于结构寿命期间可能发生的各种结冰条件，相互作用和操作场景而引起的结冰行为。本文针对极限状态设计原则和设计空气温度定义考虑了船舶和近海结构标准中使用的方法，例如芬兰瑞典冰级规则，国际船级社极地级规则和ISO 19906。本文概述了这些标准中使用的设计方法，尤其是所用结构极限的标准。基于波罗的海船舶测量的案例研究示例以及俄罗斯北极地区的设计温度数据被用来强调不同的方法及其实现。该分析清楚地表明，在考虑冰活动的标准中，极限状态定义的未来发展中，为合理的基础需要明确的设计冰活动和结构限制。 （C）2017 Elsevier Ltd.保留所有权利。

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