Research on ultimate strength analysis method of typical ship box structure under polar ice impact load
Ship hull may be impacted by ice load in the process of polar sailing,the temperature of the sea in the Arctic region is as low as-68℃,so ships sailing in the polar region will face severe ice load environment and low temperature environment.Since the hull structure is a typical box beam structure with variable cross-section combined with stiffened plates,the hull model is simplified to box beam model.Based on the convergence analy-sis of LS-DYNA for box beam-ice collision,the nonlinear finite element numerical simulation of box beam-ice collision was carried out at different temperatures,and the ultimate strength of box beam structure under ice load was obtained at different low temperatures.By introducing some sensitive parameters such as ice thickness and velocity,the general conclusion is drawn that the ultimate strength of box beam increases with the decrease of temperature,and increases with the increase of ice thickness and temperature.The above conclusions have cer-tain significance for the study of ultimate strength of box beam-ice collision at low temperature,and the research results can provide certain reference for the design of polar ship hull structure.
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维普
