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Dynamic Stress Correlation and Modeling of Driveline Bending Integrity for 4WD Sport Utility Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
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Reducing the high cost of hardware testing with analytical methods has been highly accelerated in the automotive industry. This paper discusses an analytical model to simulate the driveline bending integrity test for the longitudinal 4WD-driveline configuration. The dynamic stresses produced in the adapter/transfer case and propeller shaft can be predicted analytically using this model. Particularly, when the 4WD powertrain experiences its structural bending during the operation speed and the propeller shaft experiences the critical whirl motion and its structural bending due to the inherent imbalance. For a 4WD-Powertrain application, the dynamic coupling effect of a flexible powertrain with a flexible propeller shaft is significant and demonstrated in this paper.
Three major subsystems are modeled in this analytical model, namely the powertrain, the final rear drive, and the propeller shafts. Component and subsystem finite element model correlation with modal test data was first conducted. Then the system finite element model was correlated to the test-rig setup. Inherent imbalance was analytically included in the propeller shaft model and the whirl motion of propeller shaft was induced to simulate the testing procedure. Afterwards, the combination of nonlinear Multi-body System Simulation (MSS) with the linear Finite Element Analysis (FEA) in time domain for the evaluation of the dynamic interaction between several parts was used as a numerical tool. Finally, the new analytical capabilities of stress recovery for adapter/transfer case and propeller shaft were introduced. Available test results were used to validate the analytical model.
CitationDu, H., Liu, X., Chang, W., and Salmon, R., "Dynamic Stress Correlation and Modeling of Driveline Bending Integrity for 4WD Sport Utility Vehicles," SAE Technical Paper 2002-01-1044, 2002, https://doi.org/10.4271/2002-01-1044.
- Du, H.Y. I. et al “Modeling and Correlation of Driveshaft Whirl Dynamics for RWD Sport Utility Vehicles,” SAE 2001-01-1503 2001 SAE Noise & Vibration Conference
- Donley, M. et al “Modeling of a Driveline System Using a Building Block Approach,” SAE Paper 1999-01-1762 1999
- “Stress Recovery using LMS/DADS and MSC/NASTRAN for Dynamic Model,” LMS/DADS Document March 1 2001
- Craig, R.R. Bampton, M.C.C. “Coupling of Substructures for Dynamics Analysis,” AIAA Journal 6 1968 1313 1319
- Childs, D.W. et al “Journal Bearing Impedance Descriptions for Rotor Dynamic Applications,” ASME Journal of Lubrication Technology 1977 198 211
- Du, H.Y. I. “Simulation of Flexible Rotating Crankshaft with Flexible Engine Block and Hydrodynamic Bearing for a V6 Engine,” SAE Paper 1999-01-1752 1999
- Salmon, R. “GMT Propshaft Dynamic Balancing and Stress Determination/Process,” GMNA Internal Report August 1 2001
- Morgan, J. “2000 GMT 2WD Driveline Dynamic Stress Correlation and Analysis,” GMPT Internal Report 2001-01-29-102
- “Driveline Dynamic Stress Sensitivity,” Test Procedure, GMNA Truck Platforms Internal Procedure
- Fischer, P. et al “Integrated MBS-FE-Durability Analysis of Truck Frame Components by Modal Stresses,” ADAMS European Users Conference 2000