湖北汽车工业学院学报2026，Vol.40Issue(2)：31-35,5.DOI:10.3969/j.issn.1008-5483.2026.02.006
基于共振法的简支梁模态实验设计
Design of a Simply-Supported Beam Modal Experiment Based on Resonance Method
摘要
Abstract
To solve the problem that improper data acquisition or processing methods could affect the quality of resonance method-based modal experiments,a software operating system for point-by-point dynamic plotting of mode shapes was designed based on LabVIEW.In the experiment,signals from ac-celer-ation sensors at measuring points and a reference point were first synchronously acquired.The am-plitude,frequency,and phase of the signals were estimated using a correction method based on the Hanning window spectrum.Then,the in-phase property of the signals was judged according to whether their phase difference was within a certain range.Subsequently,the mode shape diagrams at the measur-ing points were plotted by combining the amplitude ratio and the phase similarity or dis-similarity of the signals.Experimental results show that this scheme eliminates the problems of severe mode shape distortion and measurement inconsistency compared with the testing scheme in which the reference point signal is only used to judge phase similarity or difference,and the vibration amplitude at the mea-suring point serves as the mode shape value.关键词
模态实验/共振法/频谱估计Key words
modal experiment/resonance method/spectrum estimation分类
机械制造引用本文复制引用
王超,金阳..基于共振法的简支梁模态实验设计[J].湖北汽车工业学院学报,2026,40(2):31-35,5.基金项目
汽车动力传动与电子控制湖北省重点实验室开放基金(ZDK12023B08) （ZDK12023B08）
