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An Electromagnetic System for the Non-Contact Excitation of Bladed Disks

机译：刀片式磁盘非接触励磁的电磁系统

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摘要

In this paper a non-contact excitation system based on electromagnets is described. The system aims at exciting cyclically symmetric structures like bladed disks by generating typical engine order-like travelling wave excitations that bladed disks encounter during service. Detailed description of the analytical formulation for the electromagnets sizing, quality assessment and practical implications of the final assembly for the bladed disk excitation are addressed. In particular, the paper proposes an original method to setup the excitation system in order to perform step-sine controlled force measurements. This feature is necessary when non-linear forced response must be measured on bladed disks in order to characterize the dynamic behaviour at different level of excitation. Typical applications of the designed excitation system are two: the first is the study of the effect of a force pattern characterized by a particular engine order on the forced response of mistuned bladed disks, the second is the characterization of intentional non-linear damping source occurring, for instance, for friction phenomena in presence of shrouds or underplatform dampers.
机译：本文介绍了一种基于电磁体的非接触式励磁系统。该系统旨在通过产生典型的发动机指令状行波激励来激发诸如叶片盘之类的周期性对称结构，叶片在维修过程中会遇到这种行波激励。讨论了电磁尺寸分析公式的详细说明，质量评估以及最终组件对叶片盘激励的实际意义。特别是，本文提出了一种设置励磁系统的原始方法，以执行步进正弦控制的力测量。当必须在叶片盘上测量非线性强制响应以表征不同激发水平下的动态行为时，此功能是必需的。所设计的励磁系统的典型应用有两个：第一是研究以特定发动机指令为特征的力模式对雾化叶片盘的强制响应的影响;第二是对故意的非线性阻尼源的表征。例如，用于存在护罩或平台不足的阻尼器的摩擦现象。

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