Natural Frequency

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All building elements used in industry, even all objects in the universe with mass have a natural frequency. Each substance has a natural frequency that can be expressed with the formula W=1/2pi*sqrt(k/m) over the static spring coefficient which is a certain displacement amount by compressing under the force, and its mass amount. In addition, there are forced uses and natural frequencies formed due to these boundary properties in systems that are mobile and work on some damping units. In all structures with 3 translations (UX, UY, UZ) and 3 rotations (RotX, RotY, RotZ) freedom in space, when exposed to a certain frequency band, if they are limited with their natural frequencies, the shocks will increase and this propulsion will continue for a while. Then, the part will be excessively deformed. Repetitive loads (such as vehicle engines, etc.) or continuously rotating shaft, power transmission organs should be examined by natural frequency (modal) analysis. The values obtained as a result of the analysis should be examined over the frequencies (critical modes) where the system has the most mass participation and after comparing it with the exposed excitation frequencies, in case of overshoot, the modal analysis configuration should be examined again by reducing the design or changing the mass. Critical speeds should be examined in Campbell diagrams obtained by analysing rotor dynamics with rpm speeds in service with a similar approach on continuously rotating parts. If there are speeds considered risky, they should be avoided. In addition to these, modal analysis is a fundamental analysis, and it is a type of analysis before shock analysis should be done.