Mechanical Vibration is the study of oscillatory motions of
mechanical system. It is both useful and harmful for engineering
systems. Sometimes, it is profitably used in musical instruments,
propagation of sound etc. On the other hand, excessive vibration
causes damage to buildings and rapid wear of machine parts such as
gear & bearing. At the stage of resonance, it may even lead to
the shutdown of the turbine units which directly disturbed the
economical system, time management, employment system of a nation.
Resonance is the stage where the natural frequency of the system is
equal to the external excitation frequency. Due to this, the
amplitude of vibration is excessive at resonance. So, determination
of first few modes of natural frequency of a system is a must for
design point of view. So, it is essentially required to have the
knowledge of vibration (natural frequency) for a designer.
General
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