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Simulating pass-by noise of vehicles - Comparison of a ray tracing model using simplified geometrical building models with measurement

Schuster, Roland und Berkefeld, Tobias und Henning, Arne und Ehrenfried, Klaus und Wagner, Claus (2017) Simulating pass-by noise of vehicles - Comparison of a ray tracing model using simplified geometrical building models with measurement. InterNoise 2017, 2017-08-27 - 2017-08-30, Hongkong, China.

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Offizielle URL: https://www.conftool.com/internoise2017/index.php?page=browseSessions&form_session=7#paperID690

Kurzfassung

Noise effects like wake-up reactions strongly depend on single noise events, which are characterized by the maximum sound level and their steepest slope in level time-history. To predict these time and space dependent sound events resulting from ground based transportation in urban areas, detailed simulation methods are required. State of the art 2.5D ray tracing methods for noise prediction from ground based transportation make simplifying assumptions in order to keep the simulation effort manageable. Among others they use simplified geometrical building models (LOD1-models). These LOD1-models consist of the floor plan of a building and an average height of the building. This simplification of roof shape leads to deviations in SPL compared to original roof shape. However, since the ray tracing methods focus on time-averaged noise levels, they can achieve good agreement with energy-equivalent noise levels from measurements. The question rises whether 2.5D ray tracers can adequately predict single noise events from vehicle pass-by. The missing possibility of temporal averaging demands higher quality of the simulation models and the input data. Therefore, in this paper the LOD1 assumption is investigated in terms of its influence on level- time prediction. Measurements have been carried out in the anechoic room of the DLR Göttingen to simulate a sound source passing-by a saddle roof building. In order to determine the physical influence of the roof shape they are compared to measurements with a corresponding LOD1 building. Finally, the measurement results are compared to simulation results of the CNOSSOS-EU model, a ray tracing model which uses the LOD1 assumption. The differences between measurements and the simulation model are discussed in terms of maximum sound pressure level and steepest slope of rise in level-time history and the energy-equivalent sound pressure level.

elib-URL des Eintrags:https://elib.dlr.de/114150/
Dokumentart:Konferenzbeitrag (Vortrag)
Zusätzliche Informationen:http://internoise2017.org/article.php?cmsid=35
Titel:Simulating pass-by noise of vehicles - Comparison of a ray tracing model using simplified geometrical building models with measurement
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schuster, Rolandroland.schuster (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Berkefeld, Tobiastobias.berkefeld (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Henning, Arnearne.henning (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wagner, ClausClaus.Wagner (at) dlr.dehttps://orcid.org/0000-0003-2273-0568NICHT SPEZIFIZIERT
Datum:2017
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:acoustic ray tracing, measurement
Veranstaltungstitel:InterNoise 2017
Veranstaltungsort:Hongkong, China
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:27 August 2017
Veranstaltungsende:30 August 2017
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Verkehrssystem
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V VS - Verkehrssystem
DLR - Teilgebiet (Projekt, Vorhaben):V - Verkehrsentwicklung und Umwelt II (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Fluidsysteme, GO
Hinterlegt von: Bachmann, Barbara
Hinterlegt am:05 Okt 2017 16:59
Letzte Änderung:24 Apr 2024 20:18

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