Finite element modelling of the violin with pre-stressesReport as inadecuate

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* Corresponding author 1 DALEMBERT - Institut Jean Le Rond d-Alembert

Abstract : We are interested in processes and actions at work in the manufacture and adjustment of the violins. Among these actions, some regulate the dimensions of the instrument and other mechanical state of prestress. The importance of prestressing is well known by the violin makers but little studied; we carried out a model of violin by finite elements method. This model takes into account the state of prestress and allows to study the effects of its variations on the vibration behavior of the instrument. We offer two examples of the inclusion of prestress: setting the forcing of the bass bar and the place of the sound post of a violin model reduced to the case with the loading of the strings through the mediation of the bridge. We give to compare the effects of these two parameters to the impact of changes in thickness fields of the plates and weight of the bass bar. This model does not quantify the impact of setting it proposes to study, but nevertheless it allows to identify trends and precedence. It appears from this study the importance of setting and the need to take into account the state of prestress in the computations.

Mots-clés : Finite elements Violin prestresses

Author: Francois Ollivier - Adrien Rodrigue - Charles Besnainou Joël Frelat



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