Vibration Analysis Systems

Vibration analysis systems are used for vibration testing and modal analysis. They include instrumentation for acquiring data and analyzing results. There are two types of vibration: forced and resonant. Forced vibration can be due to internally generated forces, imbalances, external loads, or ambient excitation. A vibration analysis system receives detailed signals, including levels of single frequencies, often in high frequency areas. In most cases, the results of the vibration testing are monitored over a long period of time to observe the development of wear. The reliability of vibration analysis systems depends on credible and stable recordings, and the certainty that measured frequencies and amplitudes are correct.

Vibration analysis systems use several different test methods. When using vibration test equipment, the force and velocity of the test sample will vary. Modal analysis is used as a stand-alone technique to provide data inputs and enhance the accuracy of finite element analysis. Shaker testing vibration is used to determine product or component performance under vibration or shock loads. Some systems are used to detect flaws through modal analysis. Others are used verify product designs, measure the structural fatigue of a system or material, or simulate the shock and vibration conditions in aerospace, transportation, or other demanding environments. Vibration shock testing exposes a test sample to high-amplitude pulses of force. Vibration analysis systems can be used to diagnose faults in equipment through the measurement and analysis of vibration within that equipment.

Vibration analysis systems are used in many applications, and are commonly used on most large items of rotating equipment, such as turbines, centrifugal pumps, motors, gearboxes. A vibration analysis system can be hand-held or permanently positioned accelerometers placed on key measurement points on equipment. All mechanical equipment in motion generates a vibration profile, or signature, that reflects its operating condition, and vibration analysis systems are used to monitor that equipment.

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