Simulating application of operational modal analysis to a test rig

Gustavo Chaves Storti; Lais Carrer; Felipe Wenzel da Silva Tuckmantel; Tiago Henrique Machado; Katia Lucchesi Cavalca; Nicolo Bachschmid

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Simulating application of operational modal analysis to a test rig

机译：模拟操作模态分析对试验台的应用

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Industrial machinery is often equipped with proximity probes that measure continuously position and vibrations of the shaft, generally relative to the bearings. These measurements are used for surveillance of the machine, and furnish valuable information to be used in a diagnostic process, especially when run-up or run-down transients are recorded and processed. However, a question arises, during normal operating conditions at constant rotating speed can some additional information about the dynamical behavior of the rotating shaft be extracted from these measurements? Considering that in an industrial environment the shaft vibrations are generally affected by some noise transmitted through the supporting structure by other machines operating in the considered industrial plant, where also fluids are moving in pipes and vessels, all generating vibrations, operational modal analysis (OMA) could be used for identifying natural frequencies and modal damping. And which are the conditions of the vibration measurements required to get reliable results from processing the recorded signals? In this context, the present paper aims to analyze, with the aid of a test rig, the conditions in which OMA will result successful. These conditions include both the operating condition of the shaft and the amount and quality of the noise. The test rig, where also noise has been applied to the rotating shaft by means of a magnetic actuator, furnishes some test runs that are analyzed and used for tuning a model that can then be used to explore the different conditions.

机译：工业机械通常配备有接近探针，可衡量轴的连续位置和振动，通常相对于轴承。这些测量用于监控机器，并提供在诊断过程中使用的有价值的信息，尤其是当记录和处理越来的瞬变时。然而，在恒定旋转速度的正常操作条件下出现问题可以从这些测量中提取旋转轴的动态行为的一些附加信息？考虑到在工业环境中，轴振动通常受到在所考虑的工厂操作中操作的其他机器传输的一些噪声的影响，其中流体在管道和容器中移动，所有产生振动，操作模态分析（OMA）可用于识别自然频率和模态阻尼。这是从处理记录的信号时获得可靠结果所需的振动测量的条件？在这种情况下，本文借助试验室的借助分析OMA将成功的条件。这些条件包括轴的操作条件和噪声的数量和质量。试验台通过磁致电器施加到旋转轴的试验台，提供分析的一些测试运行，用于调整可以用于探索不同条件的模型。

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来源
《Mechanical systems and signal processing》 |2021年第5期|107529.1-107529.24|共24页
作者
Gustavo Chaves Storti; Lais Carrer; Felipe Wenzel da Silva Tuckmantel; Tiago Henrique Machado; Katia Lucchesi Cavalca; Nicolo Bachschmid;
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作者单位

University of Campinas School of Mechanical Engineering 200 Mendeleyev Street 13083-860 Campinas SP Brazil;

University of Campinas School of Mechanical Engineering 200 Mendeleyev Street 13083-860 Campinas SP Brazil;

University of Campinas School of Mechanical Engineering 200 Mendeleyev Street 13083-860 Campinas SP Brazil;

University of Campinas School of Mechanical Engineering 200 Mendeleyev Street 13083-860 Campinas SP Brazil;

University of Campinas School of Mechanical Engineering 200 Mendeleyev Street 13083-860 Campinas SP Brazil;

Polytechnic of Milan Department of Mechanics via La Masa 1 20158 Milano Italy;

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原文格式 PDF
正文语种 eng
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关键词
Operational modal analysis; Rotating machinery; System modeling; Experimental data;

机译：操作模态分析;旋转机械;系统建模;实验数据;

Simulating application of operational modal analysis to a test rig

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