Conference article

Timoshenko Beam based Coupled Torsion Beam Axle Modeling Method

Minsoo Hyun
Kookmin University

Jingyu Moon
Institute of Vehicle Engineering

Daeoh Kang
Institute of Vehicle Engineering

Seungjin Heo
Kookmin University

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Published in: Proceedings of Asian Modelica Conference 2020, Tokyo, Japan, October 08-09, 2020

Linköping Electronic Conference Proceedings 174:2, s. 23-26

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Published: 2020-11-02

ISBN: 978-91-7929-775-6

ISSN: 1650-3686 (print), 1650-3740 (online)


This paper investigates the coupled torsion beam axle (CTBA) modeling method based on Timoshenko beam theory. Timoshenko beam elements are applied to torsion beams that cause large deformations, and rigid bodies are applied to parts such as spring mounts, trailing arms and knuckles. Timoshenko beam modeling was modeled using the modelica language, and the remaining components and test rigs were modeled using Modelon’s Vehicle dynamics library (VDL). To evaluate the accuracy of the model constructed in this way, the opposite wheel travel simulation is performed and the results are compared with the CTBA model based on the full flexible body. As a result of the test, the error of the roll stiffness and the trailing arm axial force are all within 3%.


Timoshenko Beam Theory, Coupled Torsion Beam Axle(CTBA), Roll Stiffness


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