Mécanique de frappe d’un piano droit : caractérisation expérimentale et implémentation de son modèle dynamique

Details

Supervisors

Fisette, Paul

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil mécanicien

Abstract

enDespite the popularity of the modern piano, few people know and understand how the impulsion on one of its keys reaches the string to make it vibrate and so playing the desired note. This research focuses on the upright piano and comes up to the development and implementation of a multibody model of its mechanism. To reach it, its elements have been identified. Its bodies were implemented as rigid bodies and hypotheses on the contact geometries have been adopted. The parameters that describe each element’s behavior have been determined through constitutive laws, so as to approach the mechanism’s real behavior. This have been done by analyzing the behavior of a Renner upright piano mechanism’s cut filmed by a camera with a high frames rate, so as to slow down the time. All these parameters have been validated by comparing the multibody model’s behavior with the real mechanism’s cut. After that, the results of the multibody model’s simulations have been analyzed in some typical situations.