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FREE IMPEDANCE [1 record]
Record 1 - internal organization data 1993-10-05
Record 1, English
Record 1, Subject field(s)
- Acoustics (Physics)
Record 1, Main entry term, English
- free impedance
1, record 1, English, free%20impedance
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The ratio of the applied excitation force phasor to the resulting velocity phasor with all other connection points of the system free, i.e. having zero restraining forces. Free impedance is the arithmetic reciprocal of a single element of the mobility matrix. 1, record 1, English, - free%20impedance
Record number: 1, Textual support number: 1 OBS
Historically, often no distinction has been made between blocked impedance and free impedance. Caution should, therefore, be exercised in interpreting published data. While experimentally determined free impedances could be assembled into a matrix, this matrix would be quite different from the blocked impedance matrix, resulting from mathematical modelling of the structure and, therefore, would not conform to the requirements for using mechanical impedance in a overall theoretical analysis of the system. 1, record 1, English, - free%20impedance
Record 1, French
Record 1, Domaine(s)
- Acoustique (Physique)
Record 1, Main entry term, French
- impédance libre
1, record 1, French, imp%C3%A9dance%20libre
correct
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Rapport du vecteur tournant de la force d'excitation au vecteur tournant de la vitesse résultante, tous les autres points de connexion du système étant libres, c'est-à-dire ayant des forces de contrainte nulle. L'impédance libre est l'inverse arithmétique d'un élément unique de la matrice de mobilité. 1, record 1, French, - imp%C3%A9dance%20libre
Record number: 1, Textual support number: 1 OBS
Par le passé, on a rarement fait la distinction entre impédance bloquée et impédance libre. Il faudrait donc faire attention lorsqu'on interprète les données publiées. Alors que les impédances libres déterminées expérimentalement pourraient être regroupées en une matrice, celle-ci serait tout à fait différente de la matrice d'impédance bloquée résultant de la modélisation mathématique de la structure et ne serait donc pas conforme aux exigences portant sur l'utilisation de l'impédance mécanique dans une analyse théorique globale du système. 1, record 1, French, - imp%C3%A9dance%20libre
Record 1, Spanish
Record 1, Textual support, Spanish
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