Prediction of the effect of engine noise shields using a combination of
boundary, shell and finite elements
S. M. Kirkup, D.J.Henwood and R.J.Tyrrell
Presented at the conference "Mathematics in the Automotive Industry" in 1989 and later published
in the proceedings Mathematics in the Automotive Industry , edited by J.R. Smith, Clarendon
Press, Oxford pp137-146 (1992)
A reduction in engine noise is sometimes attempted by fitting one or more noise shields around the engine
block structure. The change in noise resulting from the fitting of the shield(s) will depend on the
nature of the engine's vibration, the size, shape and position of the shield(s) an the material from which
the shields are built. In general the shield itself will vibrate because of acoustic and/or mechanical
coupling.
In this paper it is shown how the problem can be solved using boundary and shell elements to model the
acoustic field exterior to the boundaries and shields and finite elements to model the vibratory
properties of the shields.
The content of this paper was later published in the following journal paper:
Computer-Aided Analysis of Engine Noise (1992)
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