Dynamic Analysis of Musical Triangle

The paper deals with dynamic analysis of a two types of musical triangles, one made from stainless steel and other from alloy. The experimental method applied in this study consisted in exciting the structure with the impact hammer and recording the acoustic signals with the help of the microphone located near the sample, the acquired signals being subsequently processed in the program developed in Matlab. The time and frequency analysis showed for each drag, the frequency spectrum, the dominant frequency and the damping. Then, finite element analysis and damping simulation of the musical triangles was done with Simcenter 3D software, based on real properties of materials and experimental signals. The results between the experimental and the numerical analysis showed a good correlation between the two methods. Thus, it was observed that at the frequency of 878 Hz, the triangle vibrates in a torsional mode, followed by longitudinal vibrations (at the frequency of 1053 Hz), and at the dominant frequency, of 1877 Hz, the triangle vibrates in a transverse mode, in the plane or. The higher modes corresponding to the frequencies 3089 Hz and 3454 Hz are torsion modes.