2 edition of analysis of disc brake noise using holographic interferometry. found in the catalog.
analysis of disc brake noise using holographic interferometry.
John David Fieldhouse
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The study of the vibratory response of a mechanical system as complex as a disc brake needs to consider the complexity of the problem induced by the coupling of tribological, thermomechanical and dynamical effects. Experimental consideration are discussed here for two set ups at the full scale of the disc brake and at a local scale focussed on the third body by: 9. The paper describes the vibroacoustic phenomena generated during frictional interaction of solid bodies. A classification is given for brake-induced noise. Modern experimental methods for studying vibroacoustic phenomena in metal-polymer friction contacts are analyzed. The main approaches to reducing noise and vibration in vehicle brakes are by:
The paper discusses a fundamental investigation of a noisy commercial spline driven disc brake using thermal and holographic techniques. profile.\ud \ud \ud A friction material with an artificially high coefficient of friction was used to promote noise. The whole body visual technique of holographic interferometry is used to investigate the. Combined with dedicated analytical tools such as finite element analysis and modal analysis for vibration modelling and prediction, multichannel computer-aided data acquisition for structure analysis under operational conditions, holographic and electronic speckle pattern interferometry are still important tools for brake noise analysis. At Cited by:
Design & Analysis of a Disc Brake using Fea Open Access Journal Page 28 Disc brake working: The disc brake is a wheel brake which slows rotation of the wheel by the friction caused by pushing brake pads against a brake disc with a set of calipers. Holographic interferometry (HI) is a technique which enables static and dynamic displacements of objects with optically rough surfaces to be measured to optical interferometric precision (i.e. to fractions of a wavelength of light). These measurements can be applied to stress, strain and vibration analysis, as well as to non-destructive testing and radiation dosimetry.
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Following the modal analysis of component parts, dynamic trials include the development of the holographic technique, making use of mirrors to permit three orthogonal views of the brake to be recorded simultaneously with smaller inset mirrors allowing for additional areas, such as the ends of the piston pad, to be observed at the same time.
The Application of Holographic Interferometry to the Study of Disc Brake Noise An experimental investigation of passenger car disc brake noise has been made using the double pulsed laser holographic technique, developed to allow simultaneous recording of three orthographic visual images of a vibrating brake system.
Mechanical Cited by: Fieldhhous, J. and Newcomb, "The Application of Holographic Interferometry to the Study of Disc Brake Noise." SAE International Congress and Exposition. Cobo Centre, Detroit, USA. a review of disc and drum brake noise investigations using the technique of holographic interferometry Brake noise is a problem that accounts for the majority of warranty claims against vehicle manufacturers concerning brakes - reputed to be some $ x 10 power 6 in Europe : J D Fieldhouse.
Double pulsed laser holography is used to obtain images with fringe lines giving detailed information about the mode of vibration of a braking system generating high-frequency noise or squeal.
If the images obtained are digitized, it is shown to be possible, using image processing techniques, to develop algorithms that determine the displacement field of the exposed part of the disc by: 9.
analysis of disc brake noise using holographic interferometry. book Filnt and Hald  studied the existence and direction of travelling waves in the squealing disc brakes by using acoustic holography.
Acoustic holography. The development of a systematic, whole body, visual recording process and its application to the study of disc brake noise and its recent adaptation to investigate drum brake noise is discussed.
It is demonstrated that amplitude and vibration phase information my be obtained using classical double pulsed holographic : John D. Fieldhouse, T.P. Newcomb. The out-of-plane surface vibration of a brake disc during naturally excited squeal has been investigated using a combination of high-speed electronic speckle pattern interferometry (ESPI) and near.
(2) P. Liu et al., Analysis of disc brake squeal using the complex eigenvalue method, Applied Acoustics ; – (3) H. Ouyang et al., Numerical analysis of automotive disc brake squeal: a review, Int. Vehicle Noise and Vibration ; (4) ABAQUS Analysis User's Manual, analysed the noise by u sing holographic interferometry of two brake system with different volumes.
The noise occurs as a parts when those frequencies are close together. The researchers indicated that anti -node positio ned at the centre of the pad at higher frequency whereas it is a node. noise frequency. In general if a disc brake system is found to generate noise, it will occur at one or two specific frequ encies.
Review of Earlier Work A series of time related holograms were recorded of a brake system generating noise at Hz. The disc was vibrating with an 8 diameter mode order. of disk brake squeal using complex eigen value analysis, e Des()–  ar, Complex eigen value analysis and dynamic transient analysis in predicting disc brake squeal, e Noise Vib.
2 () –  Lamarque PV, Williams CG. ‘Brake squeak: the experiences of manufacturers and File Size: 1MB. A non-linear contact analysis of a leading-trailing shoe drum brake, using the finite element method, is presented.
The FE model accurately captures both the static and pseudo-dynamic behaviour at the friction interface.
Flexible–to-flexible contact surfaces with elastic friction capabilities are used to determine the pressure distribution. Analysis of disc brake squeal using a ten-degree-of-freedom model Ibrahim Ahmed* squeal generation at kHz and kHz were visualized by Holographic Interferometry. However, the conventional disc their theoretical studies dealt with the plain and floating caliper disc brake using a maximum of eight-degree-of-freedom models.
Int. Mech. Eng. & Rob. Res. Vignesh Shanbhag et al., MODELING AND SQUEAL ANALYSIS OF BRAKE DISC ROTOR USING ANSYS Vignesh Shanbhag 1*, Vikram Singh 1, Rathod Abhik and Baskar P *Corresponding Author: Vignesh Shanbhag, [email protected] In automobile in order to stop the vehicle motion frictional resistance is applied by means ofFile Size: 1MB.
T1 - In-Plane Disc Brake Vibration Measurement Using Holographic Interferometry. AU - Steel, W. AU - Fieldhouse, J. AU - Talbot, C. AU - Crampton, A. PY - /4. Y1 - /4. N2 - The techniques and measurement of both in-plane and out-of-plane vibration of a twin calliper disc brake was discussed during noise : William P.
Steel, John D. Fieldhouse, Chris J. Talbot, Andrew Crampton. An experimental investigation of passenger car disc brake noise has been made using the double pulsed laser holographic technique, developed to allow simultaneous recording of three orthographic visual images of a vibrating brake system.
Mechanical measurements of parameters such as disc surface strain, torque, pad deflections, pressure and noise complement the visual images for both Cited by: an experimental investigation into disc brake noise An experimental study of passenger car disc brake noise has been carried out using double pulsed laser holographic interferometry techniques.
The study of a single holographic image indicates disc vibration mode movement and additional studies confirm this to be the case. This paper investigates absolute displacement of a brake disc during noise generation. Double-pulsed holographic interferometry is used to record a series of time-related images of the brake head.
come to conclusion that “Aluminum utilization for brake disc manufacturing can contribute to increase in acceleration and reduction in braking distance”.
 Fig Disc brake assembly mounted on front wheel. Hemraj nimhal et al. in their “Thermal analysis of disc brake using ANSYS software” stated that “use of non vented disc made File Size: KB.
This paper examines the application of the proven technique of holographic interferometry for the measurement and analysis of the absolute displacement, both out-of-plane and in-plane, of a twin caliper disc brake generating noise at : John D.
Fieldhouse, William P. Steel, Chris J. Talbot, Andrew Crampton.Finite element analysis (FEA) has been used in the analysis of brake squeal. Modal analysis of brake components is an area where FEA can be readily applied. Fig. 6(b) shows a finite element model of a brake rotor. The model, consisting of Tet92 solid elements, was developed using a commercial finite element code ANSYS Cited by: System for appropriate measurement of brake noise must be based on noise detection with standardized features, leading to search results which are highly correlated to subjective (i.e.
psycho-acoustic) parameters . 2 TYPES OF BRAKE NOISE In general, brake noise phenomena can be distinguished by the mechanism of excitation.