动冰力模型试验模型律研究

冰激直立桩结构振动模型试验研究结果表明,冰条件和结构条件的组合形成了对结构响应形式的综合控制,冰激直立结构稳态振动控制机理为冰与结构的相互作用。基于动冰力模型试验数据,提出了由弹性控制因子、率控制因子以及几何尺寸控制因子组成的能够反映冰与结构相互作用水平的相互作用系数,并建立了以相互作用系数为相似准数的相似体系。所建立的相似体系可以确定引发结构稳态振动的结构条件与冰条件组合,对研究动冰力模型试验具有指导意义。

The study of the scaling law in dynamic ice force model tests

In the model test study of ice induced vibration on vertical pile,it is found that the combination of ice conditions and structural conditions controls the structural response,and the mechanism of the ice induced stead-state vibration is the interaction between ice and structure.Based on the test data,the interaction coefficient that directly reflects the interacting level between ice and structure has been established.The coefficient is composed of the elasticity control factor,the rate control factor and the dimension control factor.Consequently,the scaling law for dynamic ice force model test was established by taking the interaction coefficient as the similarity-number.The similarity system can be used to confirm the combination of the ice conditions and the structural conditions that excites steady-state vibration of the structure,so that it is directive in the dynamic ice force model test studies.