Author(s): Ke Liu; Chao Liu; Zhou Li; Shifeng Ding; Fang Li

Linked Author(s):

Keywords: propeller; ice loads; ice-propeller milling; cohesive element; propeller; blade

Abstract:

The propeller of a polar ship will contact ice blocks while operating in ice-covered waters. Propeller-ice milling is one of the most dangerous situations of ice-propeller interaction. In this work, the dynamic milling process of ice and propeller is simulated, and the physical characteristics in this process is investigated. We use the cohesive element method and the elastoplastic softening constitutive law to simulate the crushing failure and deformation of sea ice in the ice-propeller milling process. Cohesive element method can well simulate the crack propagation path when sea ice is failure. In this work, the ice loads acting on blades of a propeller are calculated in 6 DOFs, and the calculated ice loads are in good agreement with the model test results. Besides, the effects of propeller rotation speed, advance velocity and cutting depth on ice block on the ice load on propeller blades are studied. The results show that the parameters have great influence on the peaking ice load. The stress and deformation on the blade are studied, and we find that the three parameters have significant effects on the stress in the propeller, and the stress and deformation on the propeller at the blade tip and blade root should get more patience.

DOI: https://doi.org/10.5281/zenodo.14531175

Year: 2024