This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of a Multi-Body Systems Approach for Analysis of Launch Shudder in Rear Wheel Driven Vehicles
Technical Paper
2009-01-2073
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Driveline shudder is a low-frequency (10 Hz - 30 Hz) vibration issue of vehicles that can occur under various test conditions. Specifically, launch shudder is an issue that can be prevalent under vehicle take-off conditions. Factors that typically contribute to launch shudder include stick-slip excitation of friction materials (clutches) and driveline excitations, in particular, on rear wheel drive (RWD) vehicles. Shudder caused by the driveline excitation is generally related to the universal joints (Cardan joints) in the driveline system. In this case, the u-joint forces and kinematics induce a 2nd order excitation when operated under a driveline angle.
This document focuses on launch shudder phenomena resulting from driveline system excitation on a RWD vehicle. An initial treatment of the physics governing launch shudder and typical factors influencing the shudder levels in vehicle are provided. Following this, the development of a multi-body systems (MBS) based approach is described. The results from the model are shown to correlate well with experimental measurements on a test vehicle. Upon demonstrating good correlation, the MBS model is utilized to conduct sensitivity analyses with respect to key design factors that influence launch shudder. Finally, the results are summarized and suitable conclusions provided.
Recommended Content
Ground Vehicle Standard | Universal Joints and Driveshafts—Nomenclature—Terminology—Application |
Technical Paper | New Variations of the Cardan Concept Increase Universal Joint Performance |
Technical Paper | Systematic Development of Universal and Constant Velocity Joints |
Authors
Citation
Wellmann, T. and Govindswamy, K., "Development of a Multi-Body Systems Approach for Analysis of Launch Shudder in Rear Wheel Driven Vehicles," SAE Technical Paper 2009-01-2073, 2009, https://doi.org/10.4271/2009-01-2073.Also In
References
- N.N “Universal Joint and Driveshaft Design Manual” SAE Advances in Engineering Series (AE) 7
- Seherr-Toss, H.Chr. Schmelz F. Aucktor E. “Universal Joints and Driveshafts” Springer 2006
- Wellmann T. Govindswamy K. Braun E. Wolff K. “Aspects of Driveline Integration for Optimized Vehicle NVH Characteristics” SAE 2007-01-2246
- Rein U. Veitl A. “Schwingungsanalyse von NFZ-Triebsträngen im Gesamtfahrzeug mit Hybrider MKS-Methodik”