Abstract
Mechanical vibration systems are often excited by forces with special time history. Such special excitations are the impulse forces and the periodic forces. Impulse forces appear, in particular, at vehicle vibration systems, e. g. an automobile driving on a good road with some holes, an airplane flying through a turbulence or a satellite hitting a meteor. Periodic forces are found in vibration systems with unbalanced rotating parts, e. g. an unbalanced centrifuge or an automobile with unbalanced wheels. But periodic forces may be caused by a rough road or sea, too, affecting vehicles and ships. Further, in machine dynamics periodic forces are the primary disturbances. Therefore, an analysis of the system response due to impulse and periodic forces is well justified.
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