Didactic bench for the analysis of cantilever beams submitted to harmonic vibrations from a cam-follower system

Resumo

Practical classes are essential for learning in engineering courses, but there are many difficulties in
implementing them. Therefore, the development of equipment, which help in carrying out practical activities in
the course, facilitates the absorption of theoretical concepts. This work describes the procedures adopted for the
development of a didactic bench for vibration analysis. The system is consisting of a cantilever beam, where the
shaker is represented by a cam-follower system that apply a harmonic excitation force at the free end of the
beam. The project involved the implementation of a frequency control system and the development of routines
on the software LabVIEW for data collection and signal process from the bench. The LabVIEW application
allows comparisons between the theoretical signal simulated from the mathematical modeling of the beam and
the experimental signal collected by the accelerometer sensors. The construction of the didactic bench was
satisfactory because the cam-follower system was able to generate the harmonic force and control its frequency.
In addition, the application developed in LabView offered a simple interface to help students absorb the concepts
of vibration and machine design.