Adaptive analysis of polar bidirectional icebreaker ship's stern line characteristics

• Main Authors: Meize KANG, Xiaojun LI, Zhenyang WANG
• Format: Article in Journal/Newspaper
• Language: English; Chinese
• Published: Editorial Office of Chinese Journal of Ship Research 2023
• Subjects: podded propulsion; polar ship; stern line; adaptive analysis; Naval architecture. Shipbuilding. Marine engineering; VM1-989; Icebreaker; Sea ice
• Online Access: https://doi.org/10.19693/j.issn.1673-3185.02555; https://doaj.org/article/764ecc05aa944213b84e5d7a6b8a04a1

ObjectivesTo ensure the icebreaking navigation capability of polar bidirectional icebreaker ships, it is necessary to focus on the design of their stern line characteristics. MethodsThis paper surveys many polar ships in active service, summarizes the current standards, discusses the ice load modes of the pod propulsion units and ice breakage processes of ships, and analyzes the key design characteristic parameters and adaptability of the stern lines of pod-propelled polar ships.ResultsIt was found that the dip angle of the stern transom plate affects the horizontal and vertical forces on the sea ice by ships directly during the ice-breaking processes. This dip angle should be amplified properly to guide the bending fracture of sea ice effectively. The W type of stern plate transverse profile can resolve the contradiction between the optimization of wake field and the outflow efficiency of broken ice. The pod installation base could play a certain ice-breaking function, but it would affect the flow field of the pod. The tail fin would also affect the stern flow field and the outflow of broken ice obviously. Conclusions The reference for the adaptive optimization design of pod-propelled polar ship stern profile can be provided by the research results.