Response equivalent peak velocity: a new method for description of vibration environment for sensitive equipment in buildings

Kjell A. Ahlin

doi:10.1117/12.363788

28 September 1999 Response equivalent peak velocity: a new method for description of vibration environment for sensitive equipment in buildings

Kjell A. Ahlin

Author Affiliations +

Proceedings Volume 3786, Optomechanical Engineering and Vibration Control; (1999) https://doi.org/10.1117/12.363788
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Vibrations that occur within buildings that effect vibration sensitive equipment are of periodic, random or transient nature. The common way to describe a vibration is to transform its information into the frequency domain and show a graph as a function of frequency. The fundamental problem is that there is no obvious way to scale the y-axis in such a graph so that vibrations of the three classes may be compared. A working group within ISO is now presenting a Technical Specification, ISO TS 10811, 'Vibration and shock in buildings with sensitive equipment'. We introduce a new concept to handle all vibration types with only one method. The vibration under investigation is set to excite a single degree of freedom mechanical system with a certain resonance frequency. A sine wave with this frequency is exciting another identical single degree of freedom system. The amplitude of the sine wave is then varied, until both system gets the same maximum response. The vibration under investigation is then characterized for this frequency by the equivalent sine amplitude, given as peak velocity, to be compatible with other methods. The response equivalent peak velocity as a function of frequency, characterizes the vibration.

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Kjell A. Ahlin "Response equivalent peak velocity: a new method for description of vibration environment for sensitive equipment in buildings", Proc. SPIE 3786, Optomechanical Engineering and Vibration Control, (28 September 1999); https://doi.org/10.1117/12.363788

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