Main excitation frequency
Main excitation frequency
It is essential that the main excitation frequency dominating in each vibration system is correctly recorded. The majority of vibration excitation systems that require elastic mountings are combinations of drive motors and driven machines. In most cases, the basic vibration of working machines and aggregates is overlaid by other vibrations with higher frequencies, which are caused by the unbalanced movements of masses and which cause vibrations, which can also occur unevenly or periodically. Thereby once the excitation frequencies can be determined quite exactly from the rotational speeds, as in the case of motors. In many other cases, as with textile machines and machine tools, they are almost impossible to determine mathematically and vibration measurements should be carried out.
