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X-WR-CALNAME:EuroNoise 2015 Numerical integration methods for the solution of Helmholtz equations with the Wave Based Technique
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TZID:Europe/Paris
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CREATED:19700101T000000Z
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SUMMARY:EuroNoise 2015 Numerical integration methods for the solution of Helmholtz equations with the Wave Based Technique
DTSTART;TZID=Europe/Paris:20150601T152000
DTSTAMP:20150601T152000Z
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DESCRIPTION: Philipp Zsifkovits --- The Wave Based Technique is a method for airborne noise simulation, which is \naimed for applications in the low- and mid-frequency range. The main focus of \nthis article is on application to sound radiation of internal combustion \nengines.\nThe discretization of the Helmholtz equation, which is the basis for the Wave \nBased Technique, requires the computation of certain surface integrals with high \naccuracy using numerical quadrature rules. Structural vibrations of a given \nsurface (e.g. the surface of an engine block), have to be mapped to the \nintegration points. With increasing frequency the number of integration points \nin these quadratures has to be increased to achieve the desired accuracy. Every \ntime the integration points are increased the mapping procedure has to be done \nanew. To save computational time it is therefore desirable to reuse of the \nintegration points and the already computed mapping information whenever this is \npossible.\nThis paper demonstrates different strategies to reuse all or a subset of the \nintegration points in order to increase the performance. The application of \nthese strategies is benchmarked using a model of an inline 4-cylinder Diesel \nengine. An analysis of how the new strategies affect the simulation results is \ndone and performance is compared to the straightforward approach in which no \nreuse of integration points is done.\n
LOCATION:0.7 Lisbon (47)
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