相位同步对工况下模态测试的影响评估分析（英文）

发布时间：2018-08-19 17:57

【摘要】：目的:通过研究证明激励信号的相位信息对同步激励模态分析的重要性:当各激励信号的相位信息非一致时,采用较少次数的时间平均即可实现对非激励-响应信号的滤除。创新点:通过对比采用一致相位激励信号和非一致相位激励信号下的频率响应函数,证明了当各激励信号的相位信息非一致时,采用较少次数的时间平均足以实现对非激励-响应信号的滤除。方法:基于非一致相位信号的同步激励模态分析法。结论:基于同步激励时间平均技术,通过对比采用一致相位激励信号和非一致相位激励信号下的频率响应函数,证明了当各激励信号的相位信息非一致时,采用较少次数的时间平均足以实现对非激励-响应信号的滤除。在仿真试验中,非同步信号成分的滤除效果提升了98.48%;模态分析试验中,滤除效果提升了95.22%。
[Abstract]:Aim: to prove the importance of the phase information of the excitation signal to the synchronous excitation modal analysis: when the phase information of the excitation signal is not consistent, the unexcitation-response signal can be filtered out by using the average time of less times. Innovation: by comparing the frequency response function under the uniform phase excitation signal and the non-uniform phase excitation signal, it is proved that when the phase information of each excitation signal is not consistent, The average time of less times is enough to filter the unexcitation-response signal. Methods: synchronous excitation modal analysis method based on non-uniform phase signal. Conclusion: based on the synchronous excitation time averaging technique, by comparing the frequency response function between the consistent phase excitation signal and the non-uniform phase excitation signal, it is proved that when the phase information of each excitation signal is not consistent, The average time of less times is enough to filter the unexcitation-response signal. In the simulation experiment, the filtering effect of the non-synchronous signal component is increased by 98.48%, and the filtering effect is improved by 95.22% in the modal analysis test.
【作者单位】： Department
【基金】：supported by the University of Malaya Research Grant(No.RP022D-2013AET) the Fundamental Research Grant Scheme(No.FP010-2014A) the Postgraduate Research Grant(No.PG011-2015A) the Advanced Shock and Vibration Research(ASVR)Group of University of Malaya other project collaborators
【分类号】：TN911.7

【参考文献】