Frequency sweep rate and amplitude influence on nonlinear acoustic measurements

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Kristian Haller, Claes Hedberg
Title: Frequency sweep rate and amplitude influence on nonlinear acoustic measurements
Translated title: Frekvenssvephastighet och amplitud-påverkan på olinjära akusiska mätningar
Conference name: 9th Wespac
Year: 2006
City: Seoul
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Mechanical Engineering (*** Error ***)
School of Engineering S- 371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Authors e-mail: kristian.haller@bth.se
Language: English
Abstract: When subjecting a solid material to acoustic excitation
with varying amplitude and sweep rate, the frequency shift
response is not always behaving linear with amplitude.
This phenomenon is connected to intricate nonlinear mechanics
appearing in naturally imperfect materials
and in damaged non-atomic solids. It is being investigated for
different excitation amplitudes and for varying frequency sweep
rates. This onset distribution can be mapped as an activation density.
Subject: Mechanical Engineering\Structural Mechanics
Keywords: Nonlinear elasticity, sweep rate dependency, nonlinear acoustic evaluation
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