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Frequency veering and mode degeneration of a rectangular disc
Author(s) -
Brouet Francois,
Twiefel Jens,
Wallaschek Jörg
Publication year - 2015
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201510078
Subject(s) - modal , mode (computer interface) , acoustics , longitudinal mode , modal analysis , simple (philosophy) , ultrasonic sensor , welding , mechanics , materials science , physics , optics , computer science , mechanical engineering , engineering , vibration , composite material , operating system , laser , philosophy , epistemology
In typical applications as ultrasonic welding horns, the oscillators are designed to be driven in the longitudinal mode. Modal interactions occur at critical aspect ratios, resulting in a poor uniformity of the output surface and assessing the geometry as critical. In this contribution, a method is presented for a simple rectangular disc how to eliminate the modal interaction and decouple the longitudinal mode from other modes. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)