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Abstract
Noise, Vibration and Harshness phenomena regarding a passenger vehicle’s brake and suspension system can imply a reduced sense of quality as well as significant warranty costs. In contrast to well-researched mid- to highfrequency
brake squeal, low-frequency vibrations have gained popularity only most recently. Brake moan is one of these effects, featuring frequencies from 350-600 Hz. Among others, independent wheel suspension systems at the front axle can exhibit moan-related oscillations. Here, evaluations imply high familiarity to disk brake squeal, which can be explained by a coupling of different eigenmodes of suspension and brake system, induced by the frictional contact between disk and pads. Consequently, simulation techniques used for squeal evaluation should be applicable for moan phenomena too. Hence, the linearized approach of the Complex Eigenvalue Analysis was investigated for a Finite Element model of a vehicle’s front corner. Parameter variations within a relevant operating range were performed for two different rim designs. A validation based on experimental tests reveals the simulative method’s ability to predict the eigenfrequency of characteristic torsional rim oscillations. However, stability was computed divergent to the systems’ real-life behaviors: Further examination and correct implementation of sensitive parameters seem necessary for a predictive application of this linearized, simulative approach.
brake squeal, low-frequency vibrations have gained popularity only most recently. Brake moan is one of these effects, featuring frequencies from 350-600 Hz. Among others, independent wheel suspension systems at the front axle can exhibit moan-related oscillations. Here, evaluations imply high familiarity to disk brake squeal, which can be explained by a coupling of different eigenmodes of suspension and brake system, induced by the frictional contact between disk and pads. Consequently, simulation techniques used for squeal evaluation should be applicable for moan phenomena too. Hence, the linearized approach of the Complex Eigenvalue Analysis was investigated for a Finite Element model of a vehicle’s front corner. Parameter variations within a relevant operating range were performed for two different rim designs. A validation based on experimental tests reveals the simulative method’s ability to predict the eigenfrequency of characteristic torsional rim oscillations. However, stability was computed divergent to the systems’ real-life behaviors: Further examination and correct implementation of sensitive parameters seem necessary for a predictive application of this linearized, simulative approach.
Originalsprache | englisch |
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Titel | Proceedings of 8th Congress of the AAAA |
Seiten | 309-316 |
Seitenumfang | 8 |
ISBN (elektronisch) | 978-953-95097-2-7 |
Publikationsstatus | Veröffentlicht - 20 Sept. 2018 |
Veranstaltung | 8th Congress of the Alps Adria Acoustic Association (AAAA) - Zagreb, Kroatien Dauer: 20 Sept. 2018 → 21 Sept. 2018 |
Konferenz
Konferenz | 8th Congress of the Alps Adria Acoustic Association (AAAA) |
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Land/Gebiet | Kroatien |
Ort | Zagreb |
Zeitraum | 20/09/18 → 21/09/18 |
Fields of Expertise
- Mobility & Production
Fingerprint
Untersuchen Sie die Forschungsthemen von „Linearized Simulative Approach for the Investigation of a Friction-Induced Low-Frequency Brake Moan Oscillation Phenomenon Within Passenger Vehicle Front Axles“. Zusammen bilden sie einen einzigartigen Fingerprint.Projekte
- 1 Abgeschlossen
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15_005l SimGroan - Simulation des Bremsenknarzens Erarbeitung von Anregungsmechanismen für die Simulation mit Hilfe messtechnischer Untersuchungen
1/04/15 → 30/03/18
Projekt: Forschungsprojekt
Aktivitäten
- 1 Vortrag bei Konferenz oder Fachtagung
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Complex Eigenvalue Analysis for the Friction-Induced Low-Frequency Brake NVH Phenomenon Moan
Severin Huemer-Kals (Redner/in)
21 Sept. 2018Aktivität: Vortrag oder Präsentation › Vortrag bei Konferenz oder Fachtagung › Science to science