Validity of the limp model for porous materials: A criterion based on the Biot theory

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Validity of the limp model for porous materials: a criterion based on the Biot theory.

The validity of using the limp model for porous materials is addressed in this paper. The limp model is derived from the poroelastic Biot model assuming that the frame has no bulk stiffness. Being an equivalent fluid model accounting for the motion of the frame, it has fewer limitations than the usual equivalent fluid model assuming a rigid frame. A criterion is proposed to identify the porous ...

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Derivation of a Frequency Independent Criterion to Determine the Limp Model Validity for Highly Porous Sound Absorbing Materials Frequency Independent Limp Model Criterion 1

A frequency independent criterion to determine the limp model validity for highly porous sound absorbing materials is investigated. Although limp model is derived from the Biot theory assuming that the porous frame has no bulk stiffness, it is shown that this model can be used for highly porous materials since the criterion is respected. Abacus giving the criterion limit as function of the poro...

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Validity of the one-dimensional limp model for porous media

A straightforward criterion to determine the limp model validity for porous materials is addressed here. The limp model is an "equivalent fluid" model which gives a better description of the porous behavior than the well known "rigid frame" model. It is derived from the poroelastic Biot model assuming that the frame has no bulk stiffness. A criterion is proposed to identify the porous materials...

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ژورنال

عنوان ژورنال: The Journal of the Acoustical Society of America

سال: 2007

ISSN: 0001-4966

DOI: 10.1121/1.2769824