Abstract Ice ridges represent a major threat to ships and offshore structures in areas with sea ice but no icebergs, since they frequently determine and govern the structural design loads. This work focuses on the development of environmental contours for first-year sea ice ridge statistics, which are able to represent the key parameters that will influence the extreme loads that would be acting on ice-capable vessels sailing in Arctic regions. Based on the inverse first order reliability method (IFORM), the development of environmental contours to be applied for the reliability-based design of ice-capable vessels in Arctic regions is elaborated. The number of relevant parameters and hence the dimension of the space containing the environmental contour will depend on the particular ice-vessel interaction model that is to be applied. Furthermore, the influence from the degree of correlation between the environmental parameters as well as from the number of ship-ice ridge interaction during the voyage on the environmental contour shapes are studied.

中文翻译：

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为第一年冰脊统计制定环境等高线

摘要 冰脊对有海冰但没有冰山的地区的船舶和海上结构构成主要威胁，因为它们经常决定和控制结构设计载荷。这项工作的重点是开发第一年海冰脊统计的环境等高线，这些等高线能够代表将影响极端载荷的关键参数，这些极端载荷将作用于在北极地区航行的能够结冰的船只。基于逆一阶可靠性方法（IFORM），详细阐述了适用于北极地区冰船可靠性设计的环境等值线的发展。相关参数的数量以及包含环境等值线的空间维度将取决于要应用的特定冰船相互作用模型。此外，