Identification and comparative analysis of vibration modal parameters of rice planter frame

文献类型： 外文期刊

第一作者： Chen, Kaikang

作者： Chen, Kaikang;Zheng, Yongjun;Yuan, Yanwei;Zhao, Bo;Zhou, Liming;Niu, Kang;Wang, Hui;Jin, Xin

作者机构：

期刊名称：AIP ADVANCES （ 影响因子：1.6； 五年影响因子：1.6 ）

ISSN：

年卷期： 2023 年 13 卷 4 期

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收录情况： SCI

摘要： Modal parameter analysis is a common method for structural characteristic analysis. To accurately identify the modal parameters that describe the vibration characteristics of the structure, the chassis frame of the rice transplanter is taken as the research object. The least squares complex frequency domain method, the admittance circle method, and the modal peak picking method are used to process the measured vibration signal. The modal parameters, such as the natural frequency, damping ratio, and modal shape of the chassis frame, are obtained. Except for the eight-order frequency error greater than 10%, the errors of all other orders are all less than 10%. In the modal test of the frame structure of the rice transplanter, the identification results of the modal parameters are generally reliable. The recognition accuracy of the PolyLeast-Squares Complex Frequency (PolyLSCF) algorithm is lower than the recognition accuracy of the admittance circle method and modal peak picking. The values of some off-diagonal elements in the modal mass matrix calculated by the PolyLSCF algorithm and the admittance circle method are greater than 0.2. The diagonal elements of the modal mass matrix calculated by the modal peak picking method are all 1. (c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)

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