Vibrations Terms Review PDF

Vibrating Guitar String: A vibrating guitar string makes a periodic type of vibration, meaning it oscillates in a regular, repeating pattern. Analyzers: Instruments used to quantify the amplitude and frequency of vibrations in mechanical systems. Velocity: Refers to the maximum speed the trans...

Vibrating Guitar String: A vibrating guitar string makes a periodic type of vibration, meaning it oscillates in a regular, repeating pattern. Analyzers: Instruments used to quantify the amplitude and frequency of vibrations in mechanical systems. Velocity: Refers to the maximum speed the transducer achieves during a cycle, which measures how fast the vibrating component moves. Amplitude: The distance between the resting position and the maximum displacement of the wave in a vibrating system. Shaft Speed: Describes rotational speed, expressed in revolutions per minute (rpm), often related to mechanical systems involving rotating components. Phase Angle: Phase angle is zero for a floating mass at rest in water, indicating no angular displacement at that moment. Displacement: Measures the total distance the transducer (bearing) travels back and forth during one cycle of movement. Phase Angle: Phase angle is zero for a floating mass at rest in water, as it represents no movement or oscillation at that specific point. Amplitude: Indicates the level or magnitude of the displacement in a system. Angular Velocity: The rate of change of angular displacement, a vector quantity that measures the rotational speed of an object. Preventive Maintenance: Involves regularly scheduled maintenance activities to prevent unexpected failures in the future. Wavelength: The distance between corresponding points of two consecutive waves in a cyclic motion. Sensor: Converts mechanical motion into a voltage signal, enabling the measurement and monitoring of vibrations or displacements. Heartbeat Vibration: The vibration produced by a heartbeat is pulsating, involving rhythmic cycles of movement. Frequency: Refers to the number of cycles or events occurring per unit of time, measured in hertz (Hz) or cycles per minute (cpm).  Stiffness: The resistance of an elastic body to deflection or deformation when an applied force is exerted on it. Acceleration: Measures the force(s) causing back-and-forth motion, influencing the velocity and displacement of an object. Hammer Drop Vibration: A hammer drop makes an impulsive type of vibration, creating a sudden, sharp force upon impact. Vibration: A back-and-forth movement of a structure or component within a mechanical system, resulting from a force. Catastrophic Failure: A vibration effect that halts plant operations due to a significant failure in mechanical systems. Period: The time required for one full cycle of oscillation in a mechanical system, often measured in seconds. Displacement: The total distance the transducer (bearing) travels back and forth during one cycle of movement. Catastrophic Failure: Refers to the vibration effect that completely stops plant operations, often resulting from structural or mechanical breakdowns. Predictive Maintenance: Helps determine the condition of in-service equipment, predicting when maintenance should be performed to avoid failures. Fatigue Failure: Occurs when repeated stress causes material cracking and eventual failure, often ending the equipment’s life cycle. Analyzers: Instruments used to quantify the amplitude and frequency of vibrations in various mechanical systems. Earthquake Vibration: Earthquakes produce random vibrations, as the shaking is unpredictable and not based on a regular cycle. Frequency: Expressed in cycles per minute (cpm) or cycles per second (Hz), representing the number of vibrations occurring in a given time period. Period: The time required for one complete cycle of vibration in an oscillating system. Displacement: The total distance the transducer (bearing) travels back and forth during one cycle of movement.  Catastrophic Failure: Occurs when vibrations cause a significant breakdown that interrupts operations completely. Predictive Maintenance: Involves monitoring the condition of equipment to predict when maintenance should be performed, preventing unexpected breakdowns. Fatigue Failure: Happens when materials undergo repeated stress, leading to cracking and eventual equipment failure. Frequency: The number of cycles or events occurring per unit of time, typically measured in hertz (Hz). Stiffness: Refers to the resistance of an elastic material to deflection or deformation when subjected to an applied force. Period: The time required for one complete cycle of oscillation in an oscillating system. Earthquake Vibration: Earthquakes create random vibrations, as the tremors are not periodic and are unpredictable. Vibration: The back-and-forth movement of a structure, typically caused by an external force or internal oscillations within the structure. Fatigue Failure: Fatigue failure refers to a breakdown that ends the life cycle of equipment due to repeated stress and strain. Catastrophic Failure: Refers to severe vibration effects causing equipment to fail completely, halting operations. Sensors: Used to detect vibrations, enabling the measurement and monitoring of oscillations in various systems. Vibration: The back-and-forth movement of a structure, often caused by an external force or an oscillating system within the structure. Predictive Maintenance: Helps predict when equipment requires servicing, allowing for efficient maintenance scheduling to avoid unexpected failures. Fatigue Failure: Fatigue failure refers to gradual damage and eventual breakdown of equipment due to repetitive stress over time.