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对核筒悬挂结构中悬挂段参数变化与竖向地震作用下结构减震性能之间的联系进行了研究,并提出了结构一、二阶自振频率比的概念。将核筒悬挂结构简化为平面串并联多质点系模型,建立振动微分方程,通过对模型进行竖向地震作用下的时程分析,研究了悬挂结构减震性能随悬挂层数、悬挂楼层高度、悬挂楼层梁跨度及悬臂大梁跨度不同而变化的规律,同时提出了一、二阶自振频率比的概念,计算结果表明,结构一、二阶竖向自振频率比对核筒的竖向地震响应起着控制作用。
The relationship between the change of suspension section parameters in suspension structure and the seismic performance of the structure under vertical earthquake is studied, and the concept of the first and second order natural frequency ratio is proposed. The suspension structure of the core tube is simplified to a planar series-parallel multi-mass point model, and the vibration differential equation is established. According to the time-history analysis of the model under vertical seismic action, the research on the damping performance of the suspension structure depends on the number of suspension layers, The law of the first and the second natural frequency ratio is put forward. The calculation results show that the vertical natural frequency of the first and second order structure is better than the vertical seismic frequency of the core tube Response plays a controlling role.