Mobilité du chevalet de piano et précurseurs longitudinaux
Guillaume Castera, Juliette Chabassier, Paul Fisette, Brad Wagijo · HAL (Le Centre pour la Communication Scientifique Directe) · 2023
This report is devoted to the modelling of the complex movements of the piano bridge for the transmission of waves between the strings and the soundboard. The model allows accurate transmission of longitudinal waves by taking into account the rotational movements of the bridge and their transmission to the shear directions of the soundboard, modelled as a Reissner-Mindlin plate. The addition of these mobilities, which to our knowledge had never been modelled before in the context of the coupling between a non-linear string and a soundboard, makes it possible to observe longitudinal precursors. We also propose a study of the influence of the angular orientation of the string relative to the soundboard on the power transmitted via the bridge. This study, made possible by our numerical simulation tool, could have applications for instrument making.