This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Application of Energy Flow Analysis Focused on Path Visualization into Vehicle Design
Technical Paper
2010-36-0505
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The development of new design tools to predict the vibro-acoustic behavior within the vehicle development process is of essential importance to achieve better products in an ever shorter timeframe. In this paper, an energy flow post-processing tool for structural dynamic analysis is presented. The method is based on the conversion of conventional finite element (FE) results into energy quantities corresponding with each of the vehicle subcomponents. Based on the global dynamic system behavior and local subcomponent descriptions, one can efficiently evaluate the energy distribution and analyze the vibro-acoustic behavior in complex structures. By using energy as a response variable, instead of conventional design variables as pressure or velocity, one can obtain important information regarding the understanding of the vibro-acoustic behavior of the system. Moreover, the energy flow post-processing results may be used to tune input parameters for statistical energy analysis (SEA) models. Furthermore, the evaluation of the structural energy and its dominant energy flow paths can assist a design engineer in making design modifications, since the energy flow insights provide a complementary perspective into the structural behavior. The paper focuses on novel concepts of visualization of energy flow distribution, and how it can support in decision making during the vibro-acoustic design phases. This is worked out on an industrial vehicle body NVH case. In particular, different modifications in the mechanical properties (e.g., damping, mass) of the structures are analyzed.
Recommended Content
| Technical Paper | Shaping Sound Frequency Spectra of Axial Flow Fans |
| Magazine Issue | SAE Off-Highway Engineering: July 10, 2014 |
| Technical Paper | Comparison of Electric and Pneumatic Power Tools - Part I: Mechanical Characteristics and Cost |
Authors
Citation
Lenzi, M., Stigliano, G., Donders, S., Pluymers, B. et al., "Application of Energy Flow Analysis Focused on Path Visualization into Vehicle Design," SAE Technical Paper 2010-36-0505, 2010, https://doi.org/10.4271/2010-36-0505.Also In
References
- Rao, S. S. “The Finite Element Method in Engineering” 4nd Elsevier Science & Technology Books 2004
- Lyon, R. H. DeJong, R. G. “Theory and Application of Statistical Energy Analysis” 2nd Butterworth Heinemann Oxford 2003
- Manning, J. E. “Formulation of SEA parameters using mobility functions” Philosophical Transactions of the Royal Society of London, Series A: Phys. & Engineering Sciences 346 1681 477 488 1994
- Fredö, C. R. “SEA-like approach for the derivation of energy flow coefficients with a finite element model” Journal of Sound and Vibration 199 645 666 1997
- Shorter, P. J. Langley, R.S. “On the reciprocity between direct field radiation and diffuse reverberant loading Journal of Acoustical Society of America 117 1 85 95 2005
- Vlahopoulos, N. Zhao, X. “An investigation of power flow in the mid-frequency range for system of co-linear beams based on a hybrid finite element formulation” Journal of Sound and Vibration 242 3 445 473 2001
- Ragnarsson, P. Pluymers, B. Donders, S. Desmet, W. “Subcomponent modelling of input parameters for Statistical Energy Analysis by using a Wave Based Boundary Condition” Journal of sound and vibration 329 1 96 108 2010
- Borello, G. Gagliardini, L. “Virtual SEA: Towards an Industrial Process,” SAE Technical Paper 2007-01-2302 2007 10.4271/2007-01-2302
- Tadina, M. Ragnarsson, P. Pluymers, B. Donders, S. Desmet, W. Boltežar, M. “On the use of an FE based energy flow post-processing method for vehicle structural dynamic analysis” In proceedings of ISMA 2008 853 858 Leuven 2008
- Shankar, K. Keane, A. J “Vibrational energy analysis using a substructure approach: The application of receptance theory to FEA and SEA” J. Sound and Vibration 201 491 515 1996
- Mace, B. R. Shorter, P. J “Energy flow models from finite element analysis” Journal of Sound and Vibration 233 369 389 2000
- Mace, B. R “Statistical energy analysis, energy distribution models and system modes Journal of Sound and Vibration” 264 391 409 2003
- MSC.NASTRAN 2005r2 USER GUIDE MSC.Software 2005
- LMS International LMS Virtual.Lab Rev 8B - SL1 2008
- Lenzi, M. S. Stigliano, G. Ragnarsson, P. Donders, S. Tournour, M. Pluymers, B. Desmet, W “Path Visualization of Energy Flows Based on Steady State Finite Element Analysis,” 10th International Conference on Recent Advances in Structural Dynamics (RASD 2010) Southampton, UK 2010
- Lenzi, M. S. Stigliano, G. Donders, S. Pluymers, B. Desmet, W. “New insights of an energy flow visualization into vehicle design,” In proceedings of ISMA 2010 Leuven, Belgium 2010