Implications of modelling one-dimensional impact by using a spring and damper element

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Anders Jönsson, Göran Broman, Jens Bathelt
Title: Implications of modelling one-dimensional impact by using a spring and damper element
Translated title: Påverkan av modellering av endimensionel kontakt vid användandet av ett fjäder- och dämpar-element
Journal: Proceedings of the Institution of Mechanical Engineers - Part K - Journal of Multibody Dynamics
Year: 2005
Volume: 219
Issue: 7
Pagination: 299-305
ISSN: 1464-4193
Publisher: Professional Engineering Publishing
City: London
ISI number: 000232881100008
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Mechanical Engineering (Sektionen för teknik – avd. för maskinteknik)
School of Engineering S- 371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Authors e-mail: anders.jonsson@imes.mavt.ethz.ch, goran.broman@bth.se, jens.bathelt@imes.mavt.ethz.ch
Language: English
Abstract: A spring and damper contact force element is often used for modelling impact in multi-body dynamics. The related condition for transition between contact and non-contact is, however, inconsistently implemented in the literature and commercial software. This comparative study aims to clarify the implications of four commonly used transition conditions. Principal differences are discussed and, by simulation of a typical system, it is shown that there are significant differences in the dynamics of the system depending on the different conditions. Two of them give unrealistic contact forces and should imply incorrect prediction of system dynamics in most applications. This suggests that it is important to review results obtained from using these conditions and to eliminate them from commercial software. A discussion of the two other conditions culminates in a recommendation.
Subject: Mechanical Engineering\Structural Dynamics
Mechanical Engineering\General
Mechanical Engineering\Structural Mechanics
Keywords: CONTACT DYNAMICS; MECHANICS OF MACHINES; MULTI-BODY DYNAMICS; NON-LINEAR DYNAMICS; SOIL COMPACTION
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