Development of a teaching bench to simulate the vibratory effects in a flat beam
International Journal of Development Research
Development of a teaching bench to simulate the vibratory effects in a flat beam
Received 20th June 2020; Received in revised form 09th July 2020; Accepted 24th August 2020; Published online 30th September 2020
Copyright © 2020, José Fábio de Lima Nascimento et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This study aimed to develop a didactic bench for simulating the vibration effects in a flat beam. The methodology consisted of four steps: first, a bench was made to represent the system of 1 degree of freedom, followed by obtaining a mathematical model to represent the physical phenomena of the real system, followed by the study of dynamic behavior, in which it was verified the temporal response and the frequency domain of the output variables in relation to the input and ended with the validation and application of the mathematical model found. All system parameters were obtained experimentally, except for the damping rate value, which was estimated using the half power bandwidth method. From the measured and estimated parameters, a model was obtained and tuned, which resulted in the mathematical model that represents the system of an embedded flat beam. The conclusion shows that the methodology was efficient in determining a mathematical model that represents the system of a 2 ”x 3/16” x 1m flat bar with a 675g mass installed at the end and instrumented by a PCB model 352C65 piezoelectric accelerometer, which can be used on simulation benches in the Mechanical Vibration classes.
