基于ICEEMDAN-Laplace的足尺定向刨花板振动信号模态分析
Modal Analysis of Vibration Signals of Full-size Oriented Strand Board Based on ICEEMDAN-Laplace
窦佳明 1周卢婧 1刘电霆 1张厚江2
作者信息
- 1. 桂林理工大学广西高校先进制造与自动化技术重点实验室,广西桂林 541006;桂林理工大学广西智能橡胶装备工程研究中心,广西桂林 541006
- 2. 北京林业大学,北京 100091
- 折叠
摘要
为了无损、便捷检测足尺定向刨花板的动态剪切模量、弹性模量,在振动条件下通过改进型自适应噪声的完全集合经验模态分解(ICEEMDAN)和Laplace小波相关滤波法相结合来实现振动信号模态识别.采集足尺定向刨花板振动信号,通过ICEEMDAN分解得到若干固有模态函数(IMF)分量,将正交性指标和相关系数用作判据指标,并融合二次模态分解,筛选出含有足尺定向刨花板模态信息的IMF分量,再通过Laplace小波相关滤波提取足尺定向刨花板的固有频率,将检测结果与静态实验和仿真分析进行验证.结果表明:频率实验与仿真结果误差较小,在0.8％范围内;长度、宽度方向弹性模量动态检测结果与静态结果之间的相关系数分别为0.81282、0.74848,证明两者存在显著线性关系;面内剪切模量动、静态检测结果之间呈显著线性关系,相关性达到0.733 85.
Abstract
In order to non-destructively and rapidly detect the dynamic shear modulus and modulus of elasti-city of full-size oriented strand board,an intrinsic modal identification method under the conditions of the vibra-tion method is proposed,which was achieved by a combination of Improved Complete Ensemble Empirical Mod-al Decomposition of Adaptive Noise(ICEEMDAN)and Laplace wavelet correlation filtering method.First,the foot-size oriented strand board vibration signals were acquired and decomposed by ICEEMDAN to obtain several intrinsic modal functions(IMF)components with different eigen-scales;secondly,the orthogonality index and cor-relation coefficient were used as the criterion index,and the quadratic modal decomposition was integrated to screen out the IMF components containing modal information of the full-size oriented strand board;finally,the in-trinsic frequency of the full-size oriented strand board was extracted by Laplace wavelet correlation filtering,and the detection result was verified by comparing it with the static experiments and simulation analyses.The results showed that the error between the frequency experiment and the simulation results was small,within 0.8％.The correlation coefficients between the dynamic and static results of the elastic modulus in the length and width dir-ections were 0.81282 and 0.74848,respectively,which proved that there was a significant linear relationship between the results.The in-plane shear modulus results from the dynamic and static tests also showed a signific-ant linear relationship,with a correlation of 0.733 85.
关键词
足尺定向刨花板/ICEEMDAN分解/Laplace小波/弹性模量/剪切模量/无损检测Key words
full-size oriented strand board/ICEEMDAN decomposition/Laplace wavelet/modulus of elasti-city/shear modulus/nondestructive testing引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据