| Autor: |
Starck, Jukka, Pekkarinen, Jussi, Pyykkö, Ilmari, Aalto, Heikki, Toppila, Esko |
| Zdroj: |
Journal of Low Frequency Noise, Vibration and Active Control; March 1991, Vol. 10 Issue: 1 p1-7, 7p |
| Abstrakt: |
The purpose of the present study was to evaluate the frequency response function between the vibration acceleration of the support surface and different body segments of a standing man. A metal platform moving freely on roller bearings was vibrated with random horizontal vibration at RMS acceleration of 3 m/s2and frequency range 4–50 Hz. In addition to the constant horizontal acceleration, a frequency-dependent longitudinal acceleration was produced by the resonances of the support surface. The result indicates that between 4 and 20 Hz, the skeletal joints and muscles amplify longitudinal vibration acceleration and possibly transform horizontal vibration to the longitudinal vibration. At about 5 Hz the longitudinal vibration acceleration was amplified each time that it crossed joints. In the longitudinal direction the resonance frequency remained constant at different parts of the body but the resonances became sharper when crossing the main joints of the body. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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