使用ODS FRF方法分析叶轮的动态特性
Dynamic Characteristics of Impeller Using ODS FRF Method
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摘要: 以工作振型(ODS)技术为基础,采用工作振型频率响应函数(ODS FRF)分析方法对风机叶轮进行了测试,得到了所测叶轮的振动峰值频率分布及其相应振型,并和传统试验模态方法(锤击测试)进行对比。结果表明:采用ODS FRF分析方法可以从试验数据中成功提取出叶轮的重根模态,比锤击测试模态分析结果更为理想。Abstract: Based on the ODS, the dynamic characteristic of the fan impeller is obtained using ODS FRF method, and traditional experimental modal method (impact hammer testing) is also done on the same impeller for comparison. The compared results show that the result by the ODS FRF method is more desirable than that by the traditional impact modal method.