Abstract:Based on an Euler-Lagrange fluid-solid coupling algorithm, a numerical simulation on ice sheet responses under a moving load was carried out.By comparing the calculation results in uniform water depth condition with the data in field experiments, it is found that the value of critical speed, the wave profile of ice displacement response at its critical speed and the maximum negative deflection at different speeds are consistent with the experiment results, which shows the numerical method is reliable and effective.Similar simulations in the condition of restricted water area with different boundary shapes were also carried out.The influence of channel boundary shape on the displacement response and critical speed was analysed.The results show that for straight channels with different cross section shape, when a rectangular section tranfers to a trapezoidal section, the critical speed becomes lower, and the maximum depression displacement of the ice sheet will decrease at various speed.For curved channels with rectangular section, the critical speed still exists, and the maximum depression displacement amplitude corresponding to the critical speed is larger than that of straight channels.
胡明勇,李宇辰,张志宏. 航道边界形状对移动载荷激励冰层位移响应特性的影响研究[J]. 振动与冲击, 2020, 39(2): 243-248.
HU Mingyong,LI Yuchen,ZHANG Zhihong. Influence of the boundary shape of channel on the characteristics of ice-sheet displacement response induced by a moving load. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(2): 243-248.
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