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Elastokinematic Characteristics of Torsion Beam Suspensions
Technical Paper
2015-01-1497
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Torsion beam suspensions are lightweight and low in cost, and they are therefore frequently used as the rear suspensions of small front-wheel drive vehicles. However, it is difficult to predict their characteristics and to satisfy performance targets in the early stages of development in particular, because the various aspects of performance required of a suspension must be achieved by a single structure. A great deal of research has been conducted into the cross-sectional shape of the beam section; however, this paper focuses on the effect of the properties of the trailing arms on suspension characteristics.
Two similar test torsion beam suspensions differing only in the rigidity of the trailing arms were fabricated, and kinematics and compliance (K&C) tests were conducted using a 3D measurement system.
The lateral compliance test showed the anticipated result that change in toe and camber is greater in the suspension with lower rigidity trailing arms. On the other hand, the roll motion test indicated that the lower rigidity arms had substantially greater toe change as well. Analysis of displacement at each measurement point showed that lateral movement becomes larger toward the ends of the trailing arms in a linear manner. This result indicates that the difference in toe change originates from the restraint of the trailing arms by the torsion beam, and not from the deflection of the trailing arms themselves. This mechanism was verified via FEM simulations.
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Citation
Shibue, H. and Srivastava, D., "Elastokinematic Characteristics of Torsion Beam Suspensions," SAE Technical Paper 2015-01-1497, 2015, https://doi.org/10.4271/2015-01-1497.Also In
References
- Sugiura , H. , Kojima , Y. , Nishigaki , H. , Arima , M. 2000 Trailing twist axle suspension design using ADAMS
- Durali , M. and Behravesh , B. Optimization of Torsion Beam Cross Section Using a Combined FEM-Dynamic Simulation SAE Technical Paper 2003-01-2882 2003 10.4271/2003-01-2882
- Leal , V. , Landre , J. , and Bitencourt , R. Twist Beam Rear Suspension - Influencies of the Cross Section Member Geometry in the Elastokinematics Behavior SAE Technical Paper 2007-01-2860 2007 10.4271/2007-01-2860
- Carneiro , G. , da Costa , G. , Macedo , H. , and Koga , A. Design of a Torsion Beam Suspension with an Optimized Elastokinematic Behavior SAE Technical Paper 2013-36-0232 2013 10.4271/2013-36-0232