Vibration testing to determine charateristics of dynamic response on the aluminium-beam

In experimental vibration analysis, the dynamic behavior of the vibration system is observed from the response of the system to the stimulus that works on it. In measuring the Function of Frequency Response (FRF), the stimulus in the structure is given in the form of an excitation force while measuring the vibration response depends on the type of sensor being used. Specimen used in this test were carried out on Aluminum beam that have dimensions of 1000 (l) x 49.02 (h) x 4.51 (b) mm, using excitation signals originating from vibrators/exciter and impact hammer. For systems with no dampers, the phase angle, ϕ is 0, while the response follows the excitation force phase. This research aims to investigate the dynamic response in the form of vibration response characteristics in the frequency spectrum of an Aluminum beam. Based on this spectrum maps, we can observe the dominant frequency (a frequency with large amplitude). This frequency comes from the active element whose frequency changes according to changes in load input (exciter). Furthermore, from these frequency data, it is expected to determine which frequency components are derived from component element defects and indications of resonance frequencies on machine elements or noise originating frequencies. This research can be applied to vibration-based predictive maintenance methods such as in various automotive industries and machine construction.