地震作用下线性结构连接体系动力响应研究

Research on dynamic response of linear structural connection system under earthquake

为研究线性设备连接体系在地震作用下的结构动力响应规律,建立简化模型进行理论推导及参数分析。首先,针对变电设备连接体系的结构特点,提出考虑弹簧-阻尼连接单元的2E-KC简化分析模型。基于该模型进行理论推导,得到设备自振频率及动力响应计算公式。然后,针对此类变电设备连接体系进行影响参数分析,研究其动力相互作用,考察设备频率比、质量比、连接单元刚度、阻尼比等不同参数对连接体系中设备动力响应放大系数的影响规律,研究结果可供工程应用参考。

In order to study the structural dynamic response law of connected linear equipment systems under earthquake,a simplified model was established for theoretical derivation and parameter analysis.Firstly,according to the structural characteristics of the interconnected system,a simplified analysis model named 2E-KC including spring-damping connected element was proposed.Based on the model,the calculation formulas of natural frequency and dynamic response of the equipment were obtained.Then,parametric analysis was performed to study the dynamic interaction on this kind of substation equipment.Influence of different parameters such as frequency ratio,mass ratio,connected element stiffness and damping ratio,on the amplification factor of the dynamic response of the equipment in the connected system was investigated.The research results can provide reference for engineering application.