大尺度圆锥结构的冰力计算

CALCULATION OF ICE FORCE ACTING UPON A WIDE CONE STRUCTURE

大尺度圆锥结构的冰力计算不同于小尺度圆锥结构的冰力计算,它必须考虑堆积冰的影响。Maattanen教授根据他在波斯尼亚湾Kemi-Ⅰ灯塔试验圆锥上所取得的经验,建立了大尺度圆锥结构冰力分析有限元模型。但在他的文献中,对许多关键性细节(如堆积尺度)都未给出明确表达。在本文中,作者以清晰的思路分析推导了该模型的这些细节,最后,应用该模型对JZ-93锥体平台作了冰载分析,分析结果得到设计部门的认可。

There are distinctions between the analyses of ice forces on wide and narrow cone structures. The effect of rubble ice on the total ice loads must be considered in the former case. Professor Maattanen presented a finite element model for analysis of ice forces on a large cone structure on the basis of field experience of the Kemi-I lighthouse in the Gulf of Bothnia. The height of the rubble ice, however, was not clearly defined in the presentation. In this paper, the rubble height is determined from a reasonable derivation, and this model was used in the analysis of loads on the JZ9-3 artifical island. The results were accepted by designer.