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http://dx.doi.org/10.5050/KSNVN.2006.16.8.879

Torsional Modal Testing of a Non-ferromagnetic Shaft by Magnetostrictive Patch Transducers  

Cho, Seung-Hyun (서울대학교 정밀기계설계공동연구소)
Han, Soon-Woo (서울대학교 정밀기계설계공동연구소)
Park, Chan-Il (서울대학교 대학원 기계항공공학부)
Kim, Yoon-Young (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.16, no.8, 2006 , pp. 879-885 More about this Journal
Abstract
Torsional vibration is an important vibration mode when shafts, cylinders and pipes are considered. However, the modal testing of torsional vibrations is not an easy task to carry out because of the lack of proper transducers. This work presents a new torsional vibration transducer based on the magnetostrictive principle and its application to torsional modal testing. The transducer is so designed as to generate/measure only torsional vibrations excluding other vibration modes such as longitudinal and bending vibrations. The transducer is composed of ferromagnetic patches bonded to a test structure, permanent magnets, and a solenoid. Though patches and magnets are bonded to a structure, torsional vibrations are generated and measured wirelessly by a solenoid encircling a test structure. The proposed transducer works even at considerably high frequencies, say, tens of kilohertz. Furthermore, the transducer can be manufactured at a low price. To check the performance of the proposed method, the torsional modal testing on a hollow aluminum shaft was conducted. The results, such as eigenfrequencies, obtained by the proposed transducer agreed favorably with theoretical results.
Keywords
Magnetostrictive Transducer; Magnetostrictive Patch; Torsional Vibration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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