ABSTRACT

Ships operating in ice-covered waters may experience structural damage due to ice-induced loads. This can occur even though the ship structure is designed according to rules considering ice loading. The basis of these design rules can be empirical, e.g. measured loads from full-scale trials and observed damages or energy based, which is known as the Popov Method. The rules propose to apply the design ice load as a uniformly loaded rectangular pressure patch. This simplification is, however, not in line with spatial variations of local ice loads and does not account for high pressure zones directly. Therefore, this paper proposes a method for identifying a representative ice load distribution under consideration of local pressure maxima based on a spatial and temporal varying ice load sequence. This identified load is applied to an example structure and the response is compared to the response using a current rule-based patch load. .

摘要

在冰雪覆盖的水域中作业的船舶可能会因冰引起的负载而遭受结构性损坏。即使船舶结构是根据考虑冰荷载的规则设计的，也会发生这种情况。这些设计规则的基础可以是经验性的，例如，从全面试验中测得的载荷以及观察到的损坏或基于能量的方法，这称为Popov方法。该规则建议将设计冰荷载作为均匀荷载的矩形压力补丁应用。但是，这种简化与局部冰负荷的空间变化不符，并且不能直接考虑高压区域。因此，本文提出了一种基于时空变化的冰负荷序列，在考虑局部压力最大值的情况下识别代表性冰负荷分布的方法。将该识别的负载应用于示例结构，并使用当前基于规则的补丁负载将响应与响应进行比较。。