Analysis of natural frequency variability of a brake component

Gallina, Alberto; Lisowski, W.; Pichler, L.; Stachowski, A.; Uhl, Tadeusz

doi:10.1016/j.ymssp.2012.03.020

Cited by 7 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study of two nominally identical wind turbine blades [20] reports modal frequency differences ranging from 0.1% to 1.7%. The study of more than a hundred brake calipers [21] reports a maximum modal frequency deviation of 5%. Theses two results obtained on industrial objects can be compared to the present results, because they express a variation range as a percentage of the mean.…”

Section: Modal Parameter Variability For Electric Guitar As Industriamentioning

confidence: 99%

“…This may be a cause of inter-objects variation. Second, the brake calipers [21] are made of aluminium alloy and the wind turbine blade [20] of plastic and carbon fibres, whereas the electric guitars of the present study are made of wood. Wood is a material that is known for showing a quite large variability in mechanical parameters [31,32].…”

Section: Modal Parameter Variability For Electric Guitar As Industriamentioning

confidence: 99%

“…Experimental studies are reported, for example for acoustic noise in cars originating from vibratory phenomena [18,19]. Some studies focused on the unit-to-unit variability of industrially-made nominally identical products: wind turbine blades [20] or automotive brake calipers [21] for example.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modal parameter variability in industrial electric guitar making: Manufacturing process, wood variability, and lutherie decisions

2015

View full text Add to dashboard Cite

Recent studies showed that mechanical coupling between structure and strings can alter the sound of the solid body electric guitar. Modal frequencies and damping ratios of the structure can explain some sound differences between instruments. These vibratory parameters can vary because of lutherie decisions (e.g. intentionally fitting guitars with different woods for sound quality purposes), wood intrinsic variability, or making process variability. Yet the vast majority of solid body electric guitars comes from an industrial massproduction: the manufacturing process is designed for producing guitars that are the most similar possible. However, musicians and makers know that guitars of the same model both share features, and still have some individual properties. The experimental quantification of the modal parameter variability of nominally identical electric guitars in an industrial context is the aim of this article. This variability is assessed on one guitar set, and compared to other industrial objects. A second guitar set is investigated: it consists of guitars with maple or rosewood fingerboard, all other specifications being identical. This second set allows the comparison between making process and wood variability, with the variability due to an intentional lutherie decision: the change of the fingerboard wood.

show abstract

Section: Modal Parameter Variability For Electric Guitar As Industriamentioning

confidence: 99%

Section: Modal Parameter Variability For Electric Guitar As Industriamentioning

confidence: 99%

See 1 more Smart Citation

Modal parameter variability in industrial electric guitar making: Manufacturing process, wood variability, and lutherie decisions

2015

View full text Add to dashboard Cite

show abstract

“…Figure 3 presents the frequency gap obtained: it is 3% at the maximum for the six first eigenmodes. In addition, quantitative natural frequency variability on another structure (a brake component) can be found in reference [14].…”

Section: Example Of Experimental Results On a Separate Component: The Pump Casingmentioning

confidence: 99%

SICODYN international benchmark on dynamic analysis of structure assemblies: variability and numerical-experimental correlation on an industrial pump (part 2)

Audebert

Mikchevitch

Zentner

2014

Mechanics & Industry

View full text Add to dashboard Cite

An international benchmark has been organized by EDF R&D during 2008−2010, gathering 11 partners. Its main objective is to quantify the confidence in numerical models. The built-up dynamical system considered is a pump actually in service in power plants, considered in its work environment. Blind eigenfrequency numerical values relative to the pump assembly fixed in concrete present a larger variability than the 5% rough variability concerning the separate parts, essentially due to the modeling of the boundary conditions and interfaces at macro level. For the nine first eigenmodes considered, experimental-numerical correlation shows a frequency error less than 15% for the free sub-structures and nearly 30% for the free five-component system. Though the first overall modes are correctly identified, the frequency error is significantly larger for the clamped pump assembly, with however MAC coefficients higher than 0.9 for two modes; but the frequency error can be reduced to less than 9% for the four first modes after updating procedure. A lesson to draw is that measurement information is needed to improve the quality of theoretical built-up structure. After this benchmark, a more ambitious research program will follow as a FUI project, gathering the observation of numerical and experimental variabilities, updating model improvement and numerical quantification of the total uncertainty.

show abstract