Experimental assessment of the effect of an eventual non-invasive intervention on a Torres guitar through vibration testing

Pérez, Marco A.; Manjón, Antonio; Ray, John D.; Serra-López, Roger

doi:10.1016/j.culher.2016.04.011

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…Furthermore, the FDAC calculation implies a higher computational cost compared to the correlation criteria between modal order vectors, especially when there is a wide range and high resolution of frequencies. Examples of application of the FDAC criteria and its variants are found in references [32][33][34].…”

Section: Frequency Domain Assurance Criterion (Fdac)mentioning

confidence: 99%

A Novel Strategy for Automatic Mode Pairing on the Model Updating of Railway Systems with Nonproportional Damping

Ribeiro

Bragança

Brehm³

et al. 2022

Applied Sciences

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Mode pairing is a crucial step for the stability of any model-updating strategy based on experimental modal parameters. Automatically establishing a stable and assertive correspondence between numerical and experimental modes, in many cases, proves to be a very challenging task, especially in situations where complex mode shapes are present. This article presents a novel formulation for the automatic mode pairing between experimental and numerical complex modes based on an Energy-based Modal Assurance Criterion (EMAC). The efficiency of the proposed criterion was demonstrated on the basis of a case study involving the pairing between numerical and experimental modes of a passenger railway vehicle. A highly complex detailed FE numerical model of the vehicle was developed involving the modeling of the carbody, bogies and axles. A numerical damped modal analysis allowed obtaining the main global rigid-body and flexural modes of the vehicle’s carbody, as well as several local modes associated to the vibration of specific components of the carbody. Due to the localized damping provided by the suspensions, these modes presented complex modal ordinates, especially for the rigid-body modes. The comparison between the results obtained from the application of the EMAC and the classical MAC criteria, on the pairing of five global mode shapes, proved that the EMAC criterion is much more assertive, avoiding mismatches between the experimental global modes and some of the local numerical modes with similar configurations, and, consequently, establishing the correct correspondences between experimental and numerical modes.

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Section: Frequency Domain Assurance Criterion (Fdac)mentioning

confidence: 99%

A Novel Strategy for Automatic Mode Pairing on the Model Updating of Railway Systems with Nonproportional Damping

Ribeiro

Bragança

Brehm³

et al. 2022

Applied Sciences

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“…In the field of acoustic guitars, taking into account the existing body of research in relation to the acoustic behaviour of the instrument and its construction according to the most relevant luthiers, we must highlight the most important area of the acoustic guitar for the generation of sound: the top plate. Depending on its construction, which is mainly influenced by its reinforcement structure, guitar bracing, the instrument acquires one sound or another; that is, its behaviour at high or low frequencies and high or low notes, varies, defining a particular sound in each case [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of 3D Printing Direction in PLA Acoustic Guitars on Vibration Response

Burgos-Pintos,

Fernández-Zacarías,

Mayuet

et al. 2023

Polymers

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The design of musical instruments is a discipline that is still carried out in an artisanal way, with limitations and high costs. With the additive manufacturing technique, it is possible to obtain results for the generation of not only electrical but also acoustic instruments. However, it is necessary to generate a procedure to evaluate the influence of the process on the final result of the acoustics obtained. This study focuses on investigating the relationship between the construction of acoustic guitars and their final sound. The reinforcement structures at the top of the instrument are analysed, as well as how this design affects the vibratory behaviour of the top in the first five vibratory modes. Specifically, this article presents a procedure for the design of customised acoustic guitars using additive manufacturing through parametrisation and a vibrational analysis of the designed tops using finite element (FEA) and experimental physical tests, in order to develop a methodology for the study of stringed instruments. As a result, an 11% increase in the high-frequency response was achieved with a printing direction of +45°, and a reduction in the high-frequency response with ±45°. In addition, at high frequencies, a relative error of 5% was achieved with respect to the simulation. This work fulfils an identified need to study the manufacture of acoustic guitars using polylactic acid (PLA), and to be able to offer the musician a customised instrument. This represents a breakthrough in the use of this manufacturing technology, extending its relationship with product design.

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“…In addition to the computation of the modal basis of guitar soundboards, the models have been used to compute the bridge admittance of the guitar [20]. Another feature, the complex frequency domain assurance criterion has been used to evaluate the impact of a non-invasive restoration [21] and validate a model [22].…”

Section: Introductionmentioning

confidence: 99%

Model-based evidence of the dominance of the guitar brace design over material and climatic variability for dynamic behaviors

2021

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Experimental assessment of the effect of an eventual non-invasive intervention on a Torres guitar through vibration testing

Cited by 5 publications

References 18 publications

A Novel Strategy for Automatic Mode Pairing on the Model Updating of Railway Systems with Nonproportional Damping

A Novel Strategy for Automatic Mode Pairing on the Model Updating of Railway Systems with Nonproportional Damping

Influence of 3D Printing Direction in PLA Acoustic Guitars on Vibration Response

Model-based evidence of the dominance of the guitar brace design over material and climatic variability for dynamic behaviors

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