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A shaker is a device that excites the object or structure according to its amplified input signal. Several input signals are available for modal testing, but the sine sweep and random frequency vibration profiles are by far the most commonly used signals. Small objects or structures can be attached directly to the shaker table. With some types ...
A shaker is a device used in vibration testing to excite the structure, either for endurance testing or modal testing. ... Inman, Daniel J., Engineering Vibration, ...
Dongling Vibration (Chinese: 东菱振动; pinyin: Dōnglíng Zhèndòng) is a top-level vibration test equipment manufacture company. [1] [2] [3] Founded in 1995 in Suzhou, P.R China, it has over 250 employees, most of whom work in its headquarters in Suzhou, P.R. China, which is called Dongling Science and Technology Park.
Vibration (from Latin vibrāre 'to shake') is a mechanical phenomenon whereby oscillations occur about an equilibrium point.Vibration may be deterministic if the oscillations can be characterised precisely (e.g. the periodic motion of a pendulum), or random if the oscillations can only be analysed statistically (e.g. the movement of a tire on a gravel road).
Vibration calibrators are most often used for testing and checking vibration sensors and measuring instruments at the site of their operation and are, therefore, usually transportable and battery operated. The most commonly occurring vibration frequency of calibrators is 159.2 Hz, which is equivalent to a radian frequency of 1000 rad/s. The ...
A schematic of a typical laser vibrometer is shown above. The beam from the laser, which has a frequency f o, is divided into a reference beam and a test beam with a beamsplitter. The test beam then passes through the Bragg cell, which adds a frequency shift f b. This frequency shifted beam then is directed to the target.
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