vibration test system Articles
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Investigation on axial vibration of high-speed vehicle engine crankshaft based on Rayleigh differential method
A new mathematical model of axial vibration was constructed by simplifying the crankshaft to a continuous stepped shaft model and formulating kinetic formulae of shafts and masses. Applying a vector matrix, a single order or a whole system vibration can be analysed. Using a new testing device, vibrations at the free-end of the engine shaft were measured and compared with the calculation result. ...
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Dynamic Behavior of the Bumpy Road Shaking Table System
Vibration tests were performed on the “bumpy road shaking table” system at the Cambridge University Geotechnical Centrifuge to investigate its dynamic behavior under operating conditions. In these tests, steel plates of known weights were fastened onto the base of the model container. The container was then subjected to “earthquake motions” simulated by the shaking table system and the ...
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Onboard Digital Recorders Improve Flight Vibration Tests
This article discusses a new approach to acquiring random vibration environment data during aircraft flight tests, and for using these data to improve random vibration test specifications. Traditionally, flight vibration data have been acquired using telemetry systems or tape recorders, which have many disadvantages. Recently, engineers at Eglin AFB have used state-of-the-art digital recorders ...
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Air-cooled vs water-cooled shaker considerations
No, that shaker in your laboratory is not a space heater, but at times it might seem like it! The amount of heat that is generated internally in a shaker by moving test articles can be considerable. It is critically important that the temperature of the working components in your shaker are controlled so that excessive heat does not build up and damage your shaker or your test article. There ...
By Data Physics
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