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Shock and Vibration Testing Shakers

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About Shock and Vibration Testing Shakers

Shock and vibration testing shakers are force generators or transducers that provide a vibration, shock, or modal excitation source for testing and analysis. Shakers are used to determine product or component performance under vibration or shock loads, detect flaws through modal analysis, verify product designs, measure structural fatigue of a system or material or simulate the shock or vibration conditions found in aerospace, transportation or other areas. Many types of shock and vibration testing shakers are available.

Shock and vibration testing shakers can operate under a number of different principles. Mechanical shakers use a motor with an eccentric on the shaft to generate vibration. Electrodynamic shakers use an electromagnet to create force and vibration. Hydraulic shakers are useful when large force amplitudes are required, such as in testing large aerospace or marine structures or when the magnetic fields of electrodynamic generators cannot be tolerated. Pneumatic shakers, known as "air hammer tables," use pressure air to drive a table. Piezoelectric shakers work by applying an electrical charge and voltage to a sensitive piezoelectric crystal or ceramic element to generate deformation and motion. 

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