Dynamic response of wooden plates in different stages of guitar manufacturing

摘要

Numerous studies are dedicated to the dynamics of the guitar, the challenge of interdisciplinary researchers being to find a better approach to the design and construction of the classical guitar in correlation with the development of mathematical models of dynamic and acoustic behavior. The aim of this paper is to present a comparative study on dynamic behavior of guitar wooden plates in different stages of guitar manufacturing, focusing on how the dynamic response of wooden plates changes with the addition of components and the increase in mass, going from the simple wooden plate to the whole guitar body. Four types of structures (corresponding to four stages of guitar construction) were analyzed, starting from the wooden top plate without stiffening bars, then adding seven radial stiffening bars onto the structure, then the guitar's main body (including the stiffening bars) was considered, and, in the end, the whole body of the classical guitar (unfinished, without bridge, saddle, nut and strings) was analyzed. The results consist of vibration patterns with nodes and antinodes for each applied frequency, Fourier spectrum, the harmonic overtone components in accordance with geometry complexity and wood species. The novel aspects of this research consist of comparative analysis of the dynamic response of guitar plates in different stages of processing, the contribution of each added component to the acoustic and vibrational behavior of the guitar being highlighted.