NF EN ISO 10846-4
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 4 : dynamic stiffness of elements other than resilient supports for translatory motion
ISO 10846-4:2003 specifies two methods for determining the dynamic transfer stiffness for translations of resilient elements other than resilient supports. Examples are resilient bellows, shaft couplings, power supply cables, hoses and pipe hangers. Elements filled with liquids, such as oil or water, are excluded. The methods are applicable to resilient elements with flat flanges or flat clamp interfaces. It is not necessary that the flanges be parallel. The direct method can be applied in the frequency range from 1 Hz up to a frequency that is usually determined by the frame resonance of the test arrangement (typically 300 Hz for test rigs with dimensions of the order of 1 m). The indirect method covers a frequency range that is determined by the test set-up and the isolator under test. The range is typically from a lower frequency between 20 Hz and 50 Hz to an upper frequency between 2 kHz and 5 kHz. The data obtained according to the methods specified in ISO 10846-4:2003 can be used for product information provided by manufacturers and suppliers, information during product development, quality control, and calculation of the transfer of vibration through resilient elements.
ISO 10846-4:2003 specifies two methods for determining the dynamic transfer stiffness for translations of resilient elements other than resilient supports. Examples are resilient bellows, shaft couplings, power supply cables, hoses and pipe hangers. Elements filled with liquids, such as oil or water, are excluded.
The methods are applicable to resilient elements with flat flanges or flat clamp interfaces. It is not necessary that the flanges be parallel.
The direct method can be applied in the frequency range from 1 Hz up to a frequency that is usually determined by the frame resonance of the test arrangement (typically 300 Hz for test rigs with dimensions of the order of 1 m).
The indirect method covers a frequency range that is determined by the test set-up and the isolator under test. The range is typically from a lower frequency between 20 Hz and 50 Hz to an upper frequency between 2 kHz and 5 kHz.
The data obtained according to the methods specified in ISO 10846-4:2003 can be used for product information provided by manufacturers and suppliers, information during product development, quality control, and calculation of the transfer of vibration through resilient elements.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives2
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3 Termes et définitions3
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4 Principes6
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5 Dispositifs d'essai6
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5.1 Généralités6
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5.2 Systèmes de coordonnées locales6
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5.3 Composants du banc d'essai7
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5.4 Suppression des vibrations indésirables8
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5.5 Exigences particulières18
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6 Critère d'adéquation du dispositif d'essai19
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6.1 Domaine de fréquences19
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6.2 Mesurage de la force de blocage par la méthode directe20
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6.3 Détermination de la limite supérieure de fréquence f3 par la méthode indirecte21
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6.4 Transmission latérale24
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6.5 Vibrations indésirables en entrée25
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6.6 Accéléromètres25
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6.7 Transducteurs de force25
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6.8 Sommation des signaux26
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6.9 Analyseurs26
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7 Modes opératoires d'essai27
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7.1 Installation des éléments d'essai27
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7.2 Choix du système de mesurage des forces et des plaques de répartition des forces27
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7.3 Montage et fixation des accéléromètres27
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7.4 Montage et fixation de l'excitateur de vibrations27
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7.5 Signal source27
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7.6 Mesurage28
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7.7 Essai de linéarité28
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8 Évaluation des résultats d'essai29
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8.1 Évaluation de la raideur dynamique de transfert pour la méthode directe29
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8.2 Calcul de la raideur dynamique de transfert pour la méthode indirecte30
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8.3 Valeurs par bandes de tiers d'octave de la raideur dynamique de transfert moyennée en fréquence30
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8.4 Présentation des résultats par bandes de tiers d'octave31
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8.5 Présentation des données à bande étroite31
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9 Information à consigner32
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10 Rapport d'essai33
- Annexe A (informative) Raideur de transfert relative aux composants vibratoires en rotation34
- Bibliographie35
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