摘要
提出特高压支架-设备耦合体系动力分析的简化模型并据此针对体系动力特性及地震响应开展研究。首先分析支架-设备耦合体系的结构特点,提出考虑分布参数的体系2E-4D简化模型,推导了基于该模型的体系自振频率和地震响应计算公式。然后,针对2种典型电气设备,对比分析了6组不同支架-设备耦合体系数值仿真和简化模型分析所得计算结果,验证了简化模型的准确性。最后,利用简化模型考察了不同特征参数(如刚度比、高度比等)对体系动力特性及响应的影响,并得到支架对设备加速度动力放大系数的取值规律。研究结果对《电力设施抗震设计规范》中有关支架对电气设备动力响应影响相关规定的修订具有参考价值。
A simplified model is proposed for the dynamic analysis of Ultra High Voltage(UHV) electrical support-equipment coupled system, based on which the dynamic properties and seismic responses of the system are investigated. Firstly, the structural characteristics of the coupled system are analyzed, and a 2E-4D model considering distributed parameters is proposed to simplify the system. A theoretical derivation is included to calculate the natural frequencies and seismic responses of the simplified model. Secondly, by analyzing two kinds of representative electrical equipment, the results obtained from the 2E-4D model are compared with the numerical simulation results for 6 different support-equipment sets, which have verified the accuracy of the simplified model. Lastly, the proposed model is adopted for parametric analysis of a large number of support-equipment systems to investigate the influence of different characteristic parameters(e.g. stiffness ratio and height ratio etc.) on the system dynamic properties and seismic responses, and the value range of dynamic amplification factor(DAF) is determined for different supporters. This research is expected to provide reference to update Chinese codes and specifications accounting for the effect of support structures on the dynamic behavior of electrical equipment.
出处
《工程力学》
EI
CSCD
北大核心
2015年第3期82-89,共8页
Engineering Mechanics
关键词
特高压支架-设备体系
简化模型
动力放大系数
有限元分析
参数分析
UHV support-equipment system
simplified model
dynamic amplification factor
finite element analysis
parametric analysis
