What the Quality Engineer Needs to Know About Vibration Testing (Part 2 of 3)

Wayne Tustin
Wayne Tustin’s training and consulting (licensed Professional Engineer in the State of California) interests lie in the environments that can lessen equipment availability, that can cause equipment downtime. His particular concerns: dynamics, primarily the measurement, analysis and simulation (in environmental testing laboratories) of mechanical shock and vibration (particularly random vibration...read more



Details

Wayne will sample, in 3 hours, his 3-day course. In the 3 hours, he will introduce the concept of resonant behavior of a wide range of structures (the Tacoma Narrows Bridge down to electronic circuit boards). Laboratory vibration tests on samples determine whether product design and manufacture have avoided or at least lessened resonant responses. Wayne will introduce sinusoidal as well as random vibration test standards. He will show, by slides and video clips, how we perform those standard tests by means of (1.) EH or electrohydraulic or servohydraulic shaker systems and (2.) ED or electrodynamic shaker systems, including their power amplifiers and their controllers. How do we simulate in-service vibr? Why is such simulation important to QE? Seismic & Land vehicles & ships – EH or electrohydraulic or servohydraulic shakers; Air vehicles – ED shakers ED or electrodynamic shakers for higher frequencies. Shaker accessories for testing large objects or many small objects. Till 1955 we used sine vibration to identify resonances 1955 and later we use random vibration as better represents real world. What is random vibration?

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