Breaking of symmetries for stabilization of rotating continua in frictional contact

Spelsberg‐Korspeter, Gottfried

doi:10.1016/j.jsv.2008.11.033

Cited by 18 publications

(15 citation statements)

References 12 publications

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“…It was explained in [148] that chamfering could modify the merging behaviour of the modes and thus reduce squeal. It has been proposed that breaking the symmetry of brake disc could be a countermeasure to squeal [149,150,151]. In [151] it is shown that asymmetry of a disc results in splitting the double modes and has a stabilizing effect.…”

Section: Hammeringmentioning

confidence: 99%

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Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

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Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review gives a detailed description of different geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many operational issues related to disc brakes that need to be understood in a greater detail and resolved. There has been a lot of research going on about these issues and at the same time different methods are being proposed to eliminate or reduce them. There has also been an intensive fundamental research going on about the evolution of tribological interface of disc-pad system. One major purpose of the present paper is to give a comprehensive overview of all such developments.

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Section: Hammeringmentioning

confidence: 99%

“…It has been proposed that breaking the symmetry of brake disc could be a countermeasure to squeal [149,150,151]. In [151] it is shown that asymmetry of a disc results in splitting the double modes and has a stabilizing effect. This knowledge has been used in [152,153,154] for optimization of the brake rotor to avoid squeal.…”

Section: Hammeringmentioning

confidence: 99%

Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

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“…If ω 1 and ω 2 are close together, the trivial solution will get unstable. This phenomenon generally occurs in M, D, K , N systems [8] and has also been observed in similar systems with periodic coefficients [19]. Compared to the previous models, gyroscopic terms are missing and therefore the excitation mechanism is mathematically different although physically in all cases the friction forces are the origin of the instability.…”

Section: Minimal Models Of Railway Block Brakesmentioning

confidence: 61%

Minimal models for squealing of railway block brakes

Wagner

Spelsberg‐Korspeter

2010

Arch Appl Mech

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Block brakes have been used to brake railway vehicles for approximately 200 years. During the last 40 years, disk brakes have replaced the block brakes at passenger cars but block brakes are still used for all freight wagons. One problem of block brakes is that they show an enormous tendency to squeal. Although the block brake is a very common and old technical component, there exists almost no scientific work on its noise behavior regarding squeal. On the other hand, a lot of work has been done on the problem of disk brake squeal especially concerning the modeling of the excitation mechanism. The goal of this paper is to investigate whether and how models from disk brake squeal can be modified to model block brake squeal. The starting point of these investigations is a minimal model for an automotive disk brake introduced by von Wagner et al. (J Sound Vibration, 51(1-2):223-237, 2007) that is adapted to the block brake problem. It can be shown that such a simple converted model does not show any instability at all. A deeper analysis suggests that the reasons for squeal in block brakes could originate from in-plane vibrations of the brake disk or specific geometrical properties of the railway wheel. The self-excited vibrations explaining the squeal occur at relatively low rotational speeds far below the first critical rotor speed which has rarely been observed in rotor dynamics.

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“…However, the effect of breaking the symmetry of the rotor could not be quantified from a modeling point of view only until recently. In [16], it has been shown from a modeling point of view that splitting the double modes of the disc has a stabilizing effect. This result has been used for first efforts directed toward structural optimization of disc brakes in [17].…”

Section: Introductionmentioning

confidence: 99%

“…The goal of this paper is to exploit the mathematical structure of the optimization problem and to discuss the relation of geometrical symmetries to multiple eigenfrequencies. According to the results in [16,17], the goal for optimization should be to systematically avoid multiple eigenfrequencies of the brake disc.…”

Section: Introductionmentioning

confidence: 99%

Breaking of symmetries for stabilization of rotating continua in frictional contact

Cited by 18 publications

References 12 publications

Overview of disc brakes and related phenomena - a review

Overview of disc brakes and related phenomena - a review

Minimal models for squealing of railway block brakes

Eigenvalue optimization against brake squeal: Symmetry, mathematical background and experiments

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