What is vibration analysis?
In the field of mechanics, the term vibration indicates all the fluctuations around an equilibrium position. In most cases, vibrations are a problem because they cause dispersion of energy, unwanted noise, increase of displacements, of stress and of reaction forces.
Moreover, closely connected to the vibration problem there is the phenomenon of resonance. Resonance occurs when a forcing excites a mechanical system at a frequency equal to the natural frequency of the structure: in this case, induced oscillations are amplified in time and, if not carefully taken into account during the design, may even lead to the collapse of the structure or the destruction of the plant.
Perform a vibration analysis means to analyze the vibratory phenomenon from the perspective of experimental and analytical and determine its causes.
Why should you choose Vicoter?
Vicoter staff operates in the study, characterization and suppression of vibrations since more than 10 years.
Vicoter approach consists in tackling vibrations from three points of view: the experimental one, the analytical one and the numerical one. This allows you to thoroughly understand the causes of the problem and to develop the most appropriate solution.
Given a mechanical organ or an even complex structure, our company is able to:
- perform spectral analysis. It analyzes the phenomenon of a vibratory machine in its operational phase, characterizing the frequencies excited by the apparatus and the magnitude of the vibration corresponding to each one of these frequencies.
- determine the frequency response function, FRF. It defines the mutual relationships existing between forces and accelerations in the field of frequencies.
- perform modal analysis. This identifies the vibration modes, the natural frequencies and the damping of the system, allowing you to define a mathematical model of the dynamics of the object and helping the designer in identifying the critical modes associated with the structure.
- determine the operational deformed shape, ODS. This allows a 3D visualization of the vibratory phenomenon through the knowledge of the relationships binding one sensor to each measurement points. It also provides information of phase and amplitude of displacements in the space, at a given frequency.
- draw waterfall diagrams. These diagrams are the most used way to represent the multi-
spectra analysis and consist of a sequence of spectral analyzes stored in different conditions (such as, for example, the number of revolutions of a rotary apparatus). These charts allow you to distinguish the natural frequencies of the apparatus from the tones generated by its rotating parts. - characterize and size dampers.
