Author(s): Dai Huiling; Pang Fuzhen; Lang Jicai; Li Haichao
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Abstract: Aiming at the problem of low cost-effectiveness ratio in ice-breaking of traditional polar ships, this paper proposes a method of resonance ice-breaking based on resonance theory, and studies the mechanism of resonance ice-breaking. Firstly, a simplified model of infinite sea ice in the typical sea area is established. The analysis of vibration modals of the sea ice is carried out, and the relationship between the failure mode and the vibration modal is discussed. On this basis, the resonance effect of the sea ice is stimulated by the designed periodic excitation load, and its stress response and fracture process are analyzed. The effects of parameters such as the amplitude of exciting force and the excitation frequency on resonance ice-breaking effect are investigated. Finally, the method is applied to the structural design of ships, and its ability in ice-breaking is analyzed by a test, which provides a reference for the application and the related research in resonance ice-breaking of polar ships.
Year: 2020