基于实验模态和工作变形的大型风力发电机转子动力学特性分析  

Dynamic characteristic analysis of large-size wind turbine rotor based on experimental modal and operational deflection shape

作　　者：马斌 张庆 沙德生 李芊 王玉玉 MA Bin;ZHANG Qing;SHA Desheng;LI Qian;WANG Yuyu(China Huaneng Clean Energy Research Institute,Beijing 102209,China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209

出　　处：《热力发电》2023年第11期132-139,共8页Thermal Power Generation

基　　金：中国华能集团清洁能源技术研究院有限公司研究与开发基金项目(QNYJJ22-18)。

摘　　要：对大型风力发电机转子设备静止和旋转状态下的动力学特性进行了实验分析。研究主要基于实验模态分析和工作变形分析,采用LMS.TESTLAB系统及无线数采系统,首先测试各响应点锤击激励下振动信号,信号经频响函数计算、曲线拟合后得到其各阶模态参数;然后进行全转速振动测量,并根据实验结果选取共振运行工况,进行工作变形测试分析;最终实现转子静态及旋转状态数据收集、模态参数提取和分析。分析结果表明:发电机转子在旋转过程中,发生共振的频率与实验模态频率存在偏差,转子整体刚度减小;且在旋转电磁力作用下,振型由静止状态时的驻波形式变为行波形式。该研究结果对于转子动力学评估、仿真模型修正及参数输入以及转子结构优化设计具有借鉴参考意义。Test for large-size wind turbine rotor under static and rotating conditions have been carried out for rotor dynamic characteristis.Based on experimental modal and operational deflection shape,firstly this test obtained modal data using LMS TEST.Lab system by calculating FRFs and curve fitting.Secondly the resonate speed was obtained according to the vibration sweep test.Then modal parameters were analyzed through operational deflection shape test under the resonate speed.The results show that the resonate frequency under rotating condition is different from the resonate frequency under the static condition.And the modal shape of rotor under rotating condition is travelling wave while it is standing wave under static condition.In conclusion,the integral stiffness is decreased when the rotor is rotating which results in the decrease of the resonate frequency,the modal shape turns to be the travelling wave resulting from the rotating magnetic force.This research results can offer a reference and guidance for rotor dynamics evaluation,simulation model modification and parameter input,and optimization design of rotor structure.

关 键 词：风力发电机转子 实验模态 工作变形分析 振型 动态特性 

分 类 号：TM315[电气工程—电机]