冰激柔性直立四桩柱结构振动的模型试验

为了探索冰激柔性四桩柱结构振动进程的控制机理，进行了低冰速、中冰速和高冰速下的室内动冰力模型试验．试验研究发现，冰激直立四桩柱结构稳态振动过程中的控制机理是冰与结构的相互作用．在前期关于单桩柱结构的研究中，提出了一个直接反映冰与结构相互作用水平的参数，即相互作用系数，该系数对四桩柱结构的动力效应同样具有明显的控制作用，当相互作用系数在20～45内时，四桩柱结构同样会在冰排的作用下产生剧烈的振动

Model Test of Ice-Induced Vibration on Compliant Vertical Four-Pile Structure

To explore the mechanism controlling the procedure of ice-induced vibration on vertical four-pile structure, dynamic ice force model tests were performed with low-speed ,intermediate-speed and high-speed. The interaction of ice and structure was found to be the controlling mechanism of the ice-induced steady-state vibration process in the model test. In the precious study of mono-pile structure ,a parameter directly reflecting the interaction level of ice and structure,i.e, interaction coefficient,was set up. This parameter also has obvious control over the dynamic effects of the four-pile structure,and the structure will also vibrate violently when the interaction coefficient falls within the range of 20---45.