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Shock and Vibration
Volume 2014 (2014), Article ID 248129, 15 pages
Research Article

Optimization of Damper Top Mount Characteristics to Improve Vehicle Ride Comfort and Harshness

Institute of Automotive Engineering (IAE), TU Braunschweig, Germany

Received 31 January 2013; Accepted 2 September 2013; Published 13 March 2014

Academic Editor: Peijun Xu

Copyright © 2014 Mina M. S. Kaldas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel optimization technique for optimizing the damper top mount characteristics to improve vehicle ride comfort and harshness is developed. The proposed optimization technique employs a new combined objective function based on ride comfort, harshness, and impact harshness evaluation. A detailed and accurate damper top mount mathematical model is implemented inside a validated quarter vehicle model to provide a realistic simulation environment for the optimization study. The ride comfort and harshness of the quarter vehicle are evaluated by analyzing the body acceleration in different frequency ranges. In addition, the top mount deformation is considered as a penalty factor for the system performance. The influence of the ride comfort and harshness weighting parameters of the proposed objective function on the optimal damper top mount characteristics is studied. The dynamic stiffness of the damper top mount is used to describe the optimum damper top mount characteristics for different optimization case studies. The proposed optimization routine is able to find the optimum characteristics of the damper top mount which improve the ride comfort and the harshness performances together.