A multi-physics multi-scale approach in engine design analysis

Abstract Vibration behaviour of an internal combustion engine depends on rigid body inertial dynamics, structural modal characteristics of its elastic members, tribological behaviour of loadbearing contacts, and piston-cylinder interactions. Therefore, it is essential to use a multi-physics approach...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part K, Journal of multi-body dynamics Journal of multi-body dynamics, 2007-09, Vol.221 (3), p.335-348
Main Authors: Perera, M S M, Theodossiades, S, Rahnejat, H
Format: Article
Language:English
Subjects:
Design
Design analysis
Elastic properties
Engine design
Engine tests
Engines
Loads (forces)
Mechanical engineering
Noise
Physical properties
Physics
Rigid-body dynamics
Tribology
Vibration
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Summary:Abstract Vibration behaviour of an internal combustion engine depends on rigid body inertial dynamics, structural modal characteristics of its elastic members, tribological behaviour of loadbearing contacts, and piston-cylinder interactions. Therefore, it is essential to use a multi-physics approach that addresses all these physical properties in a single integrative model as presented in this paper. This approach can be regarded as holistic and a good aid for detailed design. Particular attention is paid to the critical elements in the system, such as load-bearing conjunctions (crankshaft main bearings) and piston-cylinder wall interactions. Another important feature is the integrated analysis across the physics of motion from microscale fluid film formation to submillimetre structural deformations and onto large displacements of inertial members. In order to succeed in predictions within sensible industrial time scales, analytical methods have been used as far as possible rather than numerical approaches. Model predictions show good agreement with fired engine test data.
ISSN:1464-4193
2041-3068
DOI:10.1243/14644193JMBD78