Vibration Analysis

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Many structures such as machine elements, machine bodies, all moving constructions, power transmission organs, rail system vehicles, and rubber wheeled vehicles used in industry are exposed to vibration. These vibrations can be in the form of repeated loads or random vibrations coming to the vehicle. These random vibrations from the road are very important for the automotive industry and constitute a serious design criterion that requires the mass to be adjusted so that it does not overlap with the natural frequency of the system. These vibrations can be collected as road data on the vehicle chassis with the help of certain accelerometers. These raw data collected in the acceleration-time plane are used in finite element software by filtering them into the frequency domain, and important outputs such as 3-sigma stress levels and vibration fatigue can be obtained as a result of PSD analysis. In the defence industry, these analyses can be performed by using PSD graphics, which are defined according to the usage class of the vehicles in the MIL-STD-810 specification.