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ÖNORM EN ISO 10846-5:2009-06

Действует
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 5: Driving point method for determination of the low-frequency transfer stiffness of resilient supports for translatory motion (ISO 10846-5:2008)
This part of ISO 10846 specifies a driving point method for determining the low-frequency transfer stiffness for
translations of resilient supports, under a specified preload. The method concerns the laboratory
measurement of vibrations and forces on the input side with the output side blocked, and is called the ¿driving
point method¿.
The stiffness resulting from measuring the input displacement (velocity, acceleration) and input force is the
dynamic driving point stiffness. Only at low frequencies, where the driving point stiffness and the transfer
stiffness are equal, can this method be used for determination of the dynamic transfer stiffness.
NOTE 1 In ISO 10846-2, the direct method for measuring the dynamic transfer stiffness is covered. The direct method
covers the determination of the low-frequency dynamic transfer stiffness and it covers, in principle, a wider frequency
range than the driving point method. Nevertheless, the driving point method is covered in the ISO 10846 series of
international standards as well. It is considered as a valuable option for owners of (often expensive) test rigs for driving
point stiffness measurements, to extend the use of these rigs with the determination of low-frequency dynamic transfer
stiffness.
The method is applicable to test elements with parallel flanges (see Figure 1).
Resilient elements, which are the subject of this part of ISO 10846, are those which are used to reduce
a) the transmission of vibration in the lower part of the audible frequency range (typically 20 Hz to 200 Hz) to
a structure which may, for example, radiate unwanted fluid-borne sound (airborne, waterborne or others),
and
b) the transmission of low-frequency vibrations (typically 1 Hz to 80 Hz) which may, for example, act upon
human subjects or cause damage to structures of any size when vibration is too severe.
Dieser Teil von ISO 10846 legt ein Verfahren zur Ermittlung der Transfersteifigkeit elastischer Stützelemente aus der Eingangssteifigkeit in translatorischer Richtung bei tiefen Frequenzen unter einer vorgegebenen Vorlast fest. Das Laborverfahren umfasst die Messung der Schwingungen und Kräfte auf der Eingangsseite bei fester Einspannung auf der Ausgangsseite und heißt ¿Verfahren unter Verwendung der Eingangs-steifigkeit¿. Die anhand von Messungen des Schwingwegs (der Schwinggeschwindigkeit/Schnelle, der Beschleunigung) und der Kraft auf der Eingangsseite erhaltene Steifigkeit ist die dynamische Eingangssteifigkeit. Lediglich bei tiefen Frequenzen, bei denen die Eingangssteifigkeit und die Transfersteifigkeit gleich sind, kann dieses Verfahren zur Ermittlung der dynamischen Transfersteifigkeit herangezogen werden.
ICS
17.140.01 Acoustic. Including acoustic insulation / Акустические измерения и борьба с шумами в целом. Включая звукоизоляцию
17.160 Vibrations,. Including measuring instruments and installations / Вибрации, измерения удара и вибрации. Включая измерительные приборы и установки