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Active influence on friction contacts in larger objects
Author(s) -
Hammerschmidt Antonia,
von Wagner Utz,
Kracht Kerstin
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410125
Subject(s) - vibration , micrometer , amplitude , modal , excitation , work (physics) , range (aeronautics) , modal analysis , focus (optics) , set (abstract data type) , acoustics , structural engineering , materials science , engineering , physics , computer science , mechanical engineering , optics , electrical engineering , composite material , programming language
Abstract Ultrasonic vibrations in the micrometer amplitude range have been proven to be capable to influence frictional contacts with respect to decreasing friction coefficients in experiments on small test set‐ups solely loaded by their small weight. The question is, if these effects can also be found in larger objects. This paper shows results of experimental work on applying this effect to larger objects and lager normal loads. Special focus is layed on the contact between the wheel and the rail, while the wheel or the rail being excited by piezoceramics or shakers respectively. To get the largest possible vibration amplitudes, the wheels are designed using FE‐models and are experimentally investigated for optimal actor placing and excitation by modal analysis. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)