汽轮机转子模态分析及动力特性研究  

Research of Modal Analysis and Dynamic Characteristics for Turbine Rotor

作　　者：戈志华[1] 李昂 马立群 陈浩 GE Zhi-hua;LI Ang;MA Li-qun;CHEN Hao(Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University,Beijing102206,China)

机构地区：[1]电站设备状态监测与控制教育部重点实验室(华北电力大学),北京102206

出　　处：《汽轮机技术》2018年第6期435-438,共4页Turbine Technology

基　　金：国家科技支撑计划课题(2014BAA06B01)

摘　　要：对汽轮机转子系统进行模态分析,避免转子在运行过程中由于共振引发故障。以某汽轮机转子为研究对象,利用三维Solid Works软件根据转子的几何尺寸建立实体模型,通过等效圆盘简化建立转子的计算模型。利用ANSYS软件对转子系统进行有限元模态分析,得到转子系统的固有频率和主要振型,并开展了模态试验研究,获得不同条件下模态参数。将ANSYS模态分析结果和试验结果进行了对比验证。结果表明:转子固有频率和主要振型一致,验证转子系统建模的准确性和计算精度,为转子模态分析提供了重要的理论依据。In this paper,the modal analysis has done on the turbine rotor system to avoid rotor malfunctions due to resonance during operation.The turbine rotor is selected as research object,according to the specific size,we use Solidworks to build solid model and use the method of effective disk to simplify the model.Using ANSYS did finite element modal analysis to the rotor system,we are getting natural frequency and main vibration of the rotor system and carrying out experimental study of the rotor model,getting modal parameters under different conditions and comparing the ANSYS modal analysis result to experimental result.The result shows that natural frequency is consistent with main vibration,accuracy of rotor system modeling and calculating are verified,providing an important theoretical basis for rotor modal analysis.

关 键 词：汽轮机 有限元 模态分析 试验研究 

分 类 号：TK269.4[动力工程及工程热物理—动力机械及工程] TK262