噪声与振动控制2024，Vol.44Issue(3)：43-49,7.DOI:10.3969/j.issn.1006-1355.2024.03.007
基于变分模态提取的动力响应重构方法研究
Dynamic Response Reconstruction Method Based on Variational Mode Extraction
摘要
Abstract
The response reconstruction method based on empirical mode decomposition depends on band-pass filters with many parameters,and is not suitable for structures with closely spaced modes.Therefore,a dynamic response reconstruction method based on variational mode extraction is proposed.Firstly,the dynamic response measured by the sensors is decomposed into modal responses with variational mode extraction in the time domain.Then,modal responses at the position with unknown response can be calculated through the modal transformation matrix derived from finite element modeling or the modal test,and the reconstruction of unknown dynamic response at the remaining positions can be completed through the modal superposition method.Finally,numerical simulations of a cantilever beam with loosely spaced modes and a 3-layer shear frame with closely spaced modes are carried out respectively,and the experimental analysis of a simply supported beam is conducted,which verify the effectiveness and good robustness of the proposed method.关键词
振动与波/密集模态/变分模态提取/动力响应重构/模态转换矩阵/模态叠加法Key words
vibration and wave/closely spaced modes/variational mode extraction/dynamic response reconstruction/modal transformation matrix/modal superposition method分类
建筑与水利引用本文复制引用
余恒,殷红,彭珍瑞..基于变分模态提取的动力响应重构方法研究[J].噪声与振动控制,2024,44(3):43-49,7.基金项目
国家自然科学基金资助项目(62161018) （62161018）
甘肃省优秀研究生"创新之星"资助项目(2022CXZX-569) （2022CXZX-569）
