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Approach for calibrated measurement of the frequency response for characterization of compliant interface elements on vibration test benches

Heyden, Emil; Lindenmann, Andreas; Matthiesen, Sven; Krause, Dieter

Abstract:
In vibration tests, the behavior of the structure depends on its mechanical boundary conditions, which are represented in physical tests by connecting elements with mechanical properties. Adjustable impedance elements are machine elements fulfilling the task of an adjustable connection on a vibration test bench and therefore represent a variety of properties. Their mechanical properties must be known over wider ranges than comparable compliant structures tested in the literature. This paper is dedicated to vibration testing of the adjustable impedance elements themselves, taking the influences of fixtures and measuring devices of the test bench into account. Different approaches for measuring the frequency response functions are applied to freely vibrating masses at a hydraulic and an electrodynamic test bench. Mass cancellation and the frequency-dependent measurement systems function have shown their usefulness in characterizing the biodynamic response of hand–arm models before. This measurement method is extended to be transferable to machine elements to obtain reliable results under a wider range of test conditions. The necessity for dynamically calibrated measurement of the frequency response functions is demonstrated for different free vibration masses and for two compliant elements on two different test benches to provide results over a wide range of test conditions.


Verlagsausgabe §
DOI: 10.5445/IR/1000139343
Veröffentlicht am 29.10.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Produktentwicklung (IPEK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2076-3417
KITopen-ID: 1000139343
Erschienen in Applied Sciences (Switzerland)
Verlag MDPI
Band 11
Heft 20
Seiten 9604
Schlagwörter dynamic calibration; vibration testing; measurement approach; mechanical impedance; compliant structures; adjustable impedance elements; frequency response function
Nachgewiesen in Web of Science
Scopus
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