Low natural frequency vibration isolator or seismograph
- 1 February 1974
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 45 (2) , 198-202
- https://doi.org/10.1063/1.1686587
Abstract
This passive vibration isolator, or stable table, attenuates horizontal displacements as well as tilt due to bending of the floor under shifting loads. It has a transmissiblity of 0.1 for horizontal displacements at a frequency that can be as low as 0.1 Hz. Higher frequencies are attenuated as 1/f 2. The stable platform floats on a simple air bearing that rests on a pair of I beams supported on the concrete beams of the building. A weak horizontal restoring force is exerted on the platform by two light vertical springs. The device can also be used as a two‐dimensional seismograph, or as a sensitive tilt meter.Keywords
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