基于有限参考点的设备运行变形分析研究  

Equipment Operation Deformation Analysis Based on Limited Reference Points

作　　者：王建强 沈德明 陈亚明 杨建刚[1] 谭平[1] WANG Jianqiang;SHEN Deming;CHEN Yaming;YANG Jiangang;TAN Ping(National Engineering Research Center of Turbo-Generator Vibration,Southeast University,Nanjing 210096,China;Nanjing SciyonWisdom Technology Group Co.,Ltd.,Nanjing 211102,China;Key Laboratory of Thermal Process Intelligent Control of Jiangsu Province,Nanjing 211102,China;Everbright Environmental Technology(China)Co.,Ltd.,Nanjing 211106,China)

机构地区：[1]东南大学火电机组振动国家工程研究中心,南京210096 [2]南京科远智慧科技集团股份有限公司,南京211102 [3]南京科远自动化集团股份有限公司,南京211102 [4]光大环境科技(中国)有限公司,南京211106

出　　处：《噪声与振动控制》2023年第1期265-269,共5页Noise and Vibration Control

摘　　要：运行变形分析在设备诊断中得到广泛应用。传统运行变形分析需要大量振动测点,工程上很难满足上述需求。提出一种基于有限参考点的设备运行变形分析方法。对结构进行锤击实验,获取参考点和观测点之间的频响函数矩阵,构建识别模型,计算出参考点和观测点之间的传递率矩阵。利用有限点的振动数据和传递率矩阵,计算设备全部测点的运行变形。为验证该方法,在某台架实验台上开展试验研究。通过有限参考点方法计算所得运行变形振型比较好地反映台架真实运行变形,并且发现了某截面振动异常现象,验证了本方法的可行性。Operation deformation analysis is widely used in equipment diagnosis. The traditional operation deformation analysis needs a large number of vibration measuring points. It is difficult to meet this requirement in engineering practice. This paper proposes an operation deformation analysis method based on limited reference points. The hammering experiment is carried out on the structure to obtain the frequency response function matrix which represents the relation between the reference point excitation and the observation point response. The identification model is constructed,and the transfer rate matrix between the reference point and the observation point is calculated. Using the vibration data at finite points and the transfer rate matrix, the operation deformations at all measurement points of the equipment are calculated. In order to verify this method, experimental research is carried out on a test rig. The operating deflection shapes calculated with the finite reference point method can well reflect the real operation deformation, and the abnormal vibration at a certain section is found. The feasibility of this method is verified.

关 键 词：振动与波 参考点 传递率 运行变形 频响函数 

分 类 号：O347.1[理学—固体力学] TH133.3[理学—力学]