Article | Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017 | Model Based Analysis of Shimmy in a Racing Bicycle
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Title:
Model Based Analysis of Shimmy in a Racing Bicycle
Author:
Nicolò Tomiati: Politecnico Di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria DEIB, Via Ponzio 34/5, 20133 Milano, Italy Gianantonio Magnani: Politecnico Di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria DEIB, Via Ponzio 34/5, 20133 Milano, Italy Bruno Scaglioni: Politecnico Di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria DEIB, Via Ponzio 34/5, 20133 Milano, Italy Gianni Ferretti: Politecnico Di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria DEIB, Via Ponzio 34/5, 20133 Milano, Italy
DOI:
10.3384/ecp17132441
Download:
Full text (pdf)
Year:
2017
Conference:
Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017
Issue:
132
Article no.:
050
Pages:
441-447
No. of pages:
7
Publication type:
Abstract and Fulltext
Published:
2017-07-04
ISBN:
978-91-7685-575-1
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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In this paper we are presenting a model of a racing bicycle, developed in Modelica language within the Dymola environment. The main purpose is to investigate the dynamic response of the bicycle and its modes of vibration, referring in particular to shimmy. This phenomenon occurs at high speeds and consists of sudden oscillations of the front assembly around the steering axis. Lateral accelerations on the horizontal tube of the frame can reach 5-10 g with a frequency that varies between 5-10 Hz. Even if it is quite uncommon, shimmy is a topic of great relevance, because it may be extremely dangerous for the rider. Thanks to this model, we can show that the main elements which contribute to the rise of the oscillations are the lateral compliance of the frame and the tyres’ deformation.

Keywords: bicycle shimmy flexible multibody systems

Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017

Author:
Nicolò Tomiati, Gianantonio Magnani, Bruno Scaglioni, Gianni Ferretti
Title:
Model Based Analysis of Shimmy in a Racing Bicycle
DOI:
http://dx.doi.org/10.3384/ecp17132441
References:
No references available

Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017

Author:
Nicolò Tomiati, Gianantonio Magnani, Bruno Scaglioni, Gianni Ferretti
Title:
Model Based Analysis of Shimmy in a Racing Bicycle
DOI:
http://dx.doi.org/10.3384/ecp17132441
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Last updated: 2017-02-21