This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Response Decoupling Method in Mount Design with Emphasis on Transient Load Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 18, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: Automotive Technical Papers
This research examined the focused design, elastic design, energy decoupling, and torque roll axis (TRA) decoupling methods for mount optimization design. Requiring some assumptions, these methods are invalid for some load conditions and constraints. The linearity assumption is advantageous and simplifies both design and optimization analysis, facilitating engineering applications. However, the linearity is rarely seen in real-world applications, and there is no practical method to directly measure the reaction forces in the three locally orthogonal directions, preventing validation of existing methods by experimental results. For nonlinear system identification, there are additional challenges such as unobservable internal variables and the uncertainty of measured data. In addition, nonlinear system optimization analysis is hampered by the challenge of analysis of more than two co-dimensional bifurcations as well as the locally multiple minimal values’ problem in high-dimensional space. Therefore, we must confine our analysis to the linear problem. Per the prevailing decoupling concept, the response decoupling (RD) method in time domain shock response analysis is discussed in regard to its application in shock response analysis. The proposed method is particularly applicable to transient load cases (e.g., vehicles traversing bumpy roads or torque impulses due to shifting). Design optimization and comparative analysis are implemented to further verify the proposed concept, and the feasibility of the proposed method is validated by statics and shock response calculation results. The numerical example compared four design methods, and the results showed that the new design can achieve lower vibration levels and reaction forces in multiple directions. Finally, the suggestion for further research is briefly mentioned.
CitationXiaolong, M., Huihua, F., Yuan, Z., and Shouwei, L., "Response Decoupling Method in Mount Design with Emphasis on Transient Load Conditions," SAE Technical Paper 2018-01-5046, 2019, https://doi.org/10.4271/2018-01-5046.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
|[Unnamed Dataset 5]|
|[Unnamed Dataset 6]|
- Wenbin, S., Tianping, H., Chi, X., and Yan, G. , “Calculation Method for Vibration Control Design of a Powertrain Mounting System,” Journal of Vibration Engineering 20(6):577-583, 2007.
- Yunhe, Y., Naganathan, N.G., and Dukkipati, R.V. , “A Literature Review of Automotive Vehicle Engine Mounting Systems,” Mechanism and Machine Theory (36):123-142, 2001, doi:10.1016/S0094-114X(00)00023-9UR.
- Brach, R. , “Automotive Powerplant Isolation Strategies,” SAE Technical Paper 971942 , 1997, doi:10.4271/971942.
- FitzGerald, D. , “Focused Engine Isolation Systems - The Benefits,” SAE Technical Paper 972777 , 1997, doi:10.4271/972777.
- Timpner, F.F. , “Design Considerations in Engine Mounting,” SAE Technical Paper 650093 , 1965, doi:10.4271/650093.
- Sui, J.S., Hoppe, C., and Hirshey, J. , “Powertrain Mounting Design Principles to Achieve Optimum Vibration Isolation with Demonstration Tools,” SAE Technical Paper 2003-01-1476 , 2003, doi:10.4271/2003-01-1476.
- Hafidi, A.E., Martin, B., Loredo, A., and Jego, E. , “Vibration Reduction on City Buses: Determination of Optimal Position of Engine Mounts,” Mechanical Systems and Signal Processing 24:2198-2209, 2010, doi:10.1016/j.ymssp.2010.04.001.
- Liu, C.Q. , “A Computerized Optimization Method of Engine Mounting System,” SAE Technical Paper 2003-01-1461 , 2003, doi:10.4271/2003-01-1461.
- Ranglin, F. and Zhenhua, L. , “Evaluation Approaches of Vibration-Mode Uncoupling for Multi-DOF Rigid-Body with Elastic Mounting System,” Engineering Mechanics 23(7):13-18, 2006.
- Xiaojun, Y., Weikang, J., and Cheng, C. , “Vibration Isolation Optimization of a Vehicle Powertrain Mounting System Based on Simulated Annealing and Genetic Algorithm,” Journal of Vibration and Shock 33(23):155-159, 2014, doi:10.13465/j.cnki.jvs.2014.23.028.
- Zhaoping, L. , “The Application of Energy Decoupling Technique to Powertrain Mounting System Optimization,” Automotive Engineering 30(6):523-526, 2008, doi:10.19562/j.chinasae.qcgc.2008.06.014.
- Nath Gupta, K. and Krishnamurthy Rao, M.R. , “Torque Roll Axis and Its Influence on Automotive Engine Mountings,” Journal of the Indian Institute of Science, 1962.
- Jeong, T. and Singh, R. , “Analytical Methods of Decoupling the Automotive Engine Torque Roll Axis,” Journal of Sound and Vibration 234(1):85-114, 2000, doi:10.1006/jsvi.1999.2860.
- Park, J.-Y. and Singh, R. , “Effect of Non-Proportional Damping on the Torque Roll Axis Decoupling of an Engine Mounting System,” Journal of Sound and Vibration (313):841-857, 2008, doi:10.1016/j.jsv.2007.12.007.
- Hu, J.-F. and Singh, R. , “Improved Torque Roll Axis Decoupling Axiom for a Powertrain Mounting System in the Presence of a Compliant Base,” Journal of Sound and Vibration (313):1498-1518, 2012, doi:10.1016/j.jsv.2011.11.022.
- Liette, J., Dreyer, J.T., and Singh, R. , “Critical Examination of Isolation System Design Paradigms for a Coupled Powertrain and Frame: Partial Torque Roll Axis Decoupling Methods Given Practical Constraints,” Journal of Sound and Vibration (333):7089-7108, 2014, doi:10.1016/j.jsv.2014.08.008.
- Erdelyi, H.E., Roesems, D., Toso, A., and Donders, S. , “Powertrain Mounting System Layout for Decoupling Rigid-Body Modes in the Vehicle Concept Design,” SAE Technical Paper 2013-01-1706 , 2003, doi:10.4271/2013-01-1706.
- Kolte, S.U., Neihguk, D., Prasad, A., Rawte, S. et al. , “A Particle Swarm Optimization Tool for Decoupling Automotive Powertrain Torque Roll Axis,” SAE Technical Paper 2014-01-1687 , 2014, doi:10.4271/2014-01-1687.
- Akei, M., Kouzato, K., and Uyama, T. , “Study of Engine Mount Layout for Industrial Diesel,” SAE Technical Paper 2012-32-0108 , 2012, doi:10.4271/2012-32-0108.
- Zhang, B., Zhan, H., and Gu, Y. , “A General Approach to Tune the Vibration Properties of the Mounting System in the High-Speed and Heavy-Duty Engine,” Journal of Vibration and Control 22(1):247-257, 2016, doi:10.1177/1077546314528963.
- Liu, X.-A., Lv, Z., and Shangguan, W. , “Design of Powertrain Mounting System for Engine with Three Cylinders,” SAE Technical Paper 2015-01-2354 , 2015, doi:10.4271/2015-01-2354.
- Jinfang, H. and Wuwei, C. , “Optimal Decoupling of a Powertrain Mounting System with Effect of Damping,” China Mechanical Engineering 22(22):2766-2711, 2011.
- Piersol, A.G. and Paez, T.L. , Harris’ Shock and Vibration Handbook Sixth Edition (McGraw-Hill, 2010).
- Courteille, E., Mortier, F., Leotoing, L., and Ragneau, E. , “Multi-Objective Robust Design Optimization of an Engine Mounting System,” SAE Technical Paper 2005-01-2412 , 2005, doi:10.4271/2005-01-2412.