Wagner, Andreas (2013)
Avoidance of brake squeal by a separation of the brake disc's eigenfrequencies: A structural optimization problem.
Technische Universität Darmstadt
Dissertation, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Brake squeal is a high-pitched noise in the frequency range between 1 kHz and 16 kHz originating from self-excited vibrations caused by the frictional contact between brake pads and brake disc. Since some decades, it has intensively been studied and many countermeasures have been proposed, including active and passive methods. It is known from experiments and has also been proved mathematically that splitting the eigenfrequencies of the brake rotor has a stabilizing effect and avoids brake squeal. In this thesis, this knowledge is used to derive design goals for asymmetric, squeal-free discs. It is necessary to split all eigenfrequencies of the brake disc in a pre-definable frequency band to guarantee stability, inhibit the onset of self-excited vibrations and thus avoid squeal completely. In order to achieve this goal, a structural optimization of automotive as well as bicycle brake discs is conducted. Using a novel, efficient modeling technique, large changes in the geometry can be covered leading to a successful optimization in all cases studied. Optimized automotive and bicycle brake discs have been manufactured and tested on appropriate brake test rigs to assess their squeal affinity, and it is shown that the optimized discs have a greatly improved squeal behavior. This validates the mathematical theory behind the presented approach and demonstrates that splitting eigenfrequencies of the brake rotor is a passive, low-cost and effective squeal countermeasure applicable to a variety of brake systems.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2013 | ||||
Autor(en): | Wagner, Andreas | ||||
Art des Eintrags: | Bibliographie | ||||
Titel: | Avoidance of brake squeal by a separation of the brake disc's eigenfrequencies: A structural optimization problem | ||||
Sprache: | Englisch | ||||
Referenten: | Hagedorn, Prof. Peter ; Becker, Prof. Wilfried ; Schweizer, Prof. Bernhard | ||||
Publikationsjahr: | 2013 | ||||
Ort: | Darmstadt | ||||
Verlag: | Studienbereich Mechanik, Technische Universität Darmstadt | ||||
Reihe: | Forschungsberichte des Instituts für Mechanik der Technischen Universität Darmstadt | ||||
Band einer Reihe: | 31 | ||||
Datum der mündlichen Prüfung: | 16 Oktober 2013 | ||||
Zugehörige Links: | |||||
Kurzbeschreibung (Abstract): | Brake squeal is a high-pitched noise in the frequency range between 1 kHz and 16 kHz originating from self-excited vibrations caused by the frictional contact between brake pads and brake disc. Since some decades, it has intensively been studied and many countermeasures have been proposed, including active and passive methods. It is known from experiments and has also been proved mathematically that splitting the eigenfrequencies of the brake rotor has a stabilizing effect and avoids brake squeal. In this thesis, this knowledge is used to derive design goals for asymmetric, squeal-free discs. It is necessary to split all eigenfrequencies of the brake disc in a pre-definable frequency band to guarantee stability, inhibit the onset of self-excited vibrations and thus avoid squeal completely. In order to achieve this goal, a structural optimization of automotive as well as bicycle brake discs is conducted. Using a novel, efficient modeling technique, large changes in the geometry can be covered leading to a successful optimization in all cases studied. Optimized automotive and bicycle brake discs have been manufactured and tested on appropriate brake test rigs to assess their squeal affinity, and it is shown that the optimized discs have a greatly improved squeal behavior. This validates the mathematical theory behind the presented approach and demonstrates that splitting eigenfrequencies of the brake rotor is a passive, low-cost and effective squeal countermeasure applicable to a variety of brake systems. |
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Alternatives oder übersetztes Abstract: |
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Freie Schlagworte: | brake squeal, brake disc, self-excited vibrations, structural optimization, asymmetry, circulatory systems, stability problem, finite element method | ||||
Schlagworte: |
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Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau | ||||
Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Dynamik und Schwingungen Exzellenzinitiative Exzellenzinitiative > Graduiertenschulen Exzellenzinitiative > Graduiertenschulen > Graduate School of Computational Engineering (CE) Zentrale Einrichtungen |
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Hinterlegungsdatum: | 26 Jun 2024 06:43 | ||||
Letzte Änderung: | 26 Jun 2024 06:43 | ||||
PPN: | |||||
Referenten: | Hagedorn, Prof. Peter ; Becker, Prof. Wilfried ; Schweizer, Prof. Bernhard | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 16 Oktober 2013 | ||||
Schlagworte: |
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Verfügbare Versionen dieses Eintrags
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Avoidance of brake squeal by a separation of the brake disc's eigenfrequencies: A structural optimization problem. (deposited 05 Jan 2014 20:55)
- Avoidance of brake squeal by a separation of the brake disc's eigenfrequencies: A structural optimization problem. (deposited 26 Jun 2024 06:43) [Gegenwärtig angezeigt]
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