| Summary: | The reduction of ice cover in the Arctic due to climate change has sparked interest in Arctic shipping as potential new shipping routes open up. However, while the ice cover may decrease, the ice conditions may become more unpredictable. Therefore, it is crucial to understand how different operational parameters affect the ice-induced loads on a ship hull. One of these operational parameters is the speed of the ship. While multiple studies have been conducted on its impact on ice-induced loads, no clear consensus has been reached. Hence, further study on the topic is required. The aim of this thesis was to study the effect of ship speed on the local ice-induced loads on a ship hull. Data collected onboard icebreaking polar supply and research vessel S. A. Agulhas II was utilized in the study. The data included ice load measurements, visual observations of ice thickness, and the speed of the ship collected with GPS. The ice load measurements were divided into smaller datasets, first based on ice thickness and then on speed. These datasets were studied with quantiles and a three-parameter Weibull distribution. The study concluded that the magnitudes of the highest ice-induced loads decrease with increasing speed in ice thicknesses less than 160 cm. In ice thicknesses over 160 cm, the loads seemed to stay approximately constant regardless of speed. Possible explanations were identified in the severity of ice conditions, the ship's bow waves, and the load patch's development during ship-ice interactions. Ilmastonmuutoksen seurauksena jääpeite vähenee Arktisella alueella, minkä vuoksi kiinnostus arktista merenkulkua kohtaan on lisääntynyt. Vaikka jääpeite vähenee, jääolosuhteet saattavat kuitenkin muuttua arvaamattomimmiksi. Siitä syystä on tärkeä ymmärtää, miten erilaiset parametrit vaikuttavat laivan runkoon kohdistuviin jääkuormiin. Yksi näistä parametreista on laivan nopeus. Vaikka laivan nopeuden vaikutusta jääkuormiin on tutkittu useasti, konsensusta ei ole saavutettu. Tämän takia aihe vaatii lisätutkimusta. ...
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