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Erschienen in:
2020 | OriginalPaper | Buchkapitel
29. Modal Analysis of Rotating Tires in Stationary and Rotating Frames of Reference
verfasst von : Mohammad Albakri, Pablo Tarazaga
Erschienen in: Topics in Modal Analysis & Testing, Volume 8
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Abstract
Design and development of tires require accurate characterization of their dynamic response. For this purpose, Experimental Modal Analysis (EMA) techniques have been heavily utilized. However, as the focus shifts from stationary to rotating tires, testing solutions become limited and more challenging. Conventionally, cleat excitation with force measurements on the fixed spindle has been the standard approach for testing tires in rotation. However, the limited control on the input excitation has hindered the characterization of rotating tires, especially at high frequency.
In this work, EMA of rotating tires mounted on a free-spindle rotating modal rig is investigated. Testing is conducted in stationary and rotating frames-of-reference. In the former configuration, electrodynamic shakers attached to the free-spindle are used to excite the tire and a Scanning Laser Doppler Vibrometer (SLDV) is used to measure the response at the sidewall. For the later frame-of-reference, piezoelectric actuators mounted inside the rotating tire are utilized for excitation, whereas accelerometers mounted on the sidewall are used for response measurement. The capabilities and limitations of both testing configurations are investigated at several rotational speeds. The effects of contact patch excitation and the frequency range of interest on EMA of rotating tires are also addressed.