To improve noise, vibration, and harshness (NVH) performance in a mechanical system, engineers make changes in the mass, damping, or stiffness properties of components in the system. A system response prediction method using a sensitivity function is suggested to reduce the cost in the design modification process. Embedded sensitivity functions derived solely from empirical data have been applied to identify optimal design modifications for reducing vibration resonance problems. In this paper, those sensitivity functions are used to predict the changes in vibration behavior of a system with respect to the design parameter modification. The cost and time for building many prototypes and testing actual parts can be reduced by identifying the best parameters to be changed and determining the amount of modification in those design variables through the prediction of the system response before actual components are built. The method is applied to a single degree of freedom analytical model to study the accuracy of the predictions. Finite element analyses are then conducted on a three-story structure with modifications to the stiffness and mass distributions to demonstrate the feasibility of these predictions in applications to more complicated structural systems.
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ASME 2010 International Mechanical Engineering Congress and Exposition
November 12–18, 2010
Vancouver, British Columbia, Canada
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4450-2
PROCEEDINGS PAPER
Prediction of Changes in System Vibration Response Using Empirical Sensitivity Functions
Chulho Yang,
Chulho Yang
Oklahoma State University, Stillwater, OK
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Douglas E. Adams
Douglas E. Adams
Purdue University, West Lafayette, IN
Search for other works by this author on:
Chulho Yang
Oklahoma State University, Stillwater, OK
Douglas E. Adams
Purdue University, West Lafayette, IN
Paper No:
IMECE2010-37165, pp. 149-155; 7 pages
Published Online:
April 30, 2012
Citation
Yang, C, & Adams, DE. "Prediction of Changes in System Vibration Response Using Empirical Sensitivity Functions." Proceedings of the ASME 2010 International Mechanical Engineering Congress and Exposition. Volume 13: Sound, Vibration and Design. Vancouver, British Columbia, Canada. November 12–18, 2010. pp. 149-155. ASME. https://doi.org/10.1115/IMECE2010-37165
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