核电站环行起重机模态测试和抗震分析  

Modal test and seismic analysis of polar crane in nuclear power station

作　　者：雷斌 焦学勇 Lei Bin;Jiao Xueyong

机构地区：[1]太原重工股份有限公司,太原030024 [2]智能采矿装备技术全国重点实验室,太原030024

出　　处：《起重运输机械》2023年第9期83-88,共6页Hoisting and Conveying Machinery

摘　　要：文中对模态分析、模态测试的原理进行了剖析,对模态参数和模态叠加法在结构抗震分析时的应用进行了梳理,并针对小型简支梁结构进行了验证性测试。结果表明:模态测试和有限元计算得到的模态参数比较匹配,各阶固有频率平均相差4%。另外,通过对CAP1400核电站环行起重机桥架进行模态测试方法设计以及现场模态测试,得出桥架的前3阶固有频率和阻尼比。测试结果与有限元仿真比对的结果表明,前3阶固有频率相差不大,仿真模型具有一定的可靠性。In this paper,the principles of modal analysis and modal test were analyzed,the application of modal parameters and modal superposition method in structural seismic analysis was explained,and a small simply supported beam structure was verified.The results show that the modal parameters obtained by modal test and finite element calculation were relatively matched,and the average difference of natural frequencies of each order was 4%.In addition,the modal test method design and field modal test were carried out for the gantry crane of CAP1400 nuclear power plant,and the natural frequencies and damping ratio of the gantry crane in the first three stages were obtained.The comparison between the test results and the finite element simulation results shows that there is little difference between the natural frequencies in the first three stages,and the simulation model has certain reliability.

关 键 词：环行起重机 抗震分析 模态测试 有限元 

分 类 号：TH215[机械工程—机械制造及自动化]