This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Approach for Dynamic Response Correlation of Exhaust System between Measurements and FE-Simulations
Technical Paper
2010-01-1569
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Study and design of the lifetime durability of mechanical
components in an automotive exhaust system becomes a challenging
task today for engineers. During the investigation, both
experimental tests and finite element simulations are used for the
investigation under dynamic engine excitations. For the dynamic
finite element analysis, the experimental system must be simplified
as a linear mathematic model and real boundary conditions are
idealized. Due to this simplification, the dynamic behavior of the
finite element model may strongly deviate from that in operational
conditions. To gain insight into the dynamic behavior of exhaust
systems from simulations, the finite model must be modified based
on experimental results.
As known the harmonic response is related to modal shapes and
engine loads. Therefore, modifications of the finite element model
can be done from these two aspects. Tenneco has developed an
approach for correlation between measurements and FE simulations
with respect to the harmonic response in full exhaust systems. In
this approach model updating and input load compensation are
combined. To evaluate the dynamic response correlation between
measurements and FE simulations, the Modal Assurance Criterion
(MAC) is used which gives a global number between 0 ~ 1 for how
good the correlation is between the two. By use of this approach,
MAC values are improved and the validation process of the finite
element simulation is speeded up. Tenneco has been making efforts
to validate FE simulations with respect to computational speed and
robustness. This tool provides an important contribution to this
objective.
Authors
Citation
Zhou, S., "An Approach for Dynamic Response Correlation of Exhaust System between Measurements and FE-Simulations," SAE Technical Paper 2010-01-1569, 2010, https://doi.org/10.4271/2010-01-1569.Also In
References
- Friswell, M. I. Mottershead, J. E. Finite Element Model Updating in Structural Dynamics Kluwer Academic Publishers Dordrecht/Boston/London 0-7923-3431-0 1995
- Lauwagie, J. E. Strobbe, J. Dascotte, E. Clavier, J. Monteagudo, M. “Optimization of the Dynamic Response of a Complete Exhaust System” Proceedings of the 27th International Modal Analysis Conference (IMAC) Orlando, Florida, USA February 2009
- Dascotte, E. “Model Updating for Structural Dynamics: Past, Present and Future Outlook” International Conference on Engineering Dynamics (ICED) Carvoeiro, Algarve, Portugal April 2007
- Brughmans, M. Leuridan, J. Langenhove, V. Turgay, F. “Validation of Automotive Component FE Models by Means of Test-Analysis Correlation and Model Updating” SAE Technical Paper 1999-01-1797 1999
- Dascotte, E. Desanghere, G. “Updating of Force Functions” Proceedings of the 9th International Modal Analysis Conference (IMAC) Florence, Italy April 1991
- Feisst, P. Maier, A. Pettrich, T. “Ersatzlastbestimmung für System- und Komponententest bei Abgasanlagen” MTZ 68 9 720 725 2007
- Mottershead, J.E. Friswell, M.I. Ng, G.H.T. Brandon, J.A. “Experience in Mechanical Joint Model Updating” 19th internal seminar on Modal Analysis Leuven, Belgium September 1994
- Zhou, S. X. (Shunxin) Wang, Y. Feisst, P. Salomon, P. “Messdatenunterstütze Motormodelle zur dynamischen Simulation der Abgasanlagen” ATZ 110 11 1014 1019 2008