Soundproofing wall system

Abstract

The present invention relates to a system, in particular a drywall panel, comprising a core extending along a main plane, a first facing plate and a wall structure, the first plate and the wall structure being arranged on either side of the core and each extending in a plane parallel to the main plane, the first plate and the wall structure being mounted fixed to the core, the first plate having a first stiffness k 1 less than 30,000 Nm- 1. Figure for abstract: Fig. 1

Description

Title of the invention: Acoustic insulation wall system Field of invention

[0001] The present invention relates to an acoustic insulation wall system and in particular to a drywall panel. State of the art

[0002] It is known to manufacture a drywall panel comprising a core and two facing plates. The two facing plates are made of plaster and are fixed to the core on either side of the core. It is also known to manufacture the core of metal. However, it may be desirable to lighten the partition panel and manufacture the panel at a lower cost.

[0003] For this purpose, it is known to manufacture the core from cellular material and particularly from cellular cardboard. The cellular cardboard can be manufactured by interlacing strips of cardboard. The edges of the cardboard strips form a first face and a second face which are glued to each of the facing plates. Thus, it is possible to reduce the manufacturing cost of the partition panel while lightening the partition panel and allowing the panel to have a rigidity comparable to or greater than the rigidity of a panel comprising a metal core. Such a facing panel is known under the trade name "Placopan" (registered trademark). However, the sound insulation of the panel comprising a core of cellular cardboard is lower than the sound insulation of panels comprising a metal core. Statement of the invention

[0004] An aim of the invention is to propose a solution for manufacturing an acoustic insulation wall system having acoustic insulation properties superior to known systems, and in particular to drywall panels comprising known honeycomb cores.

[0005] This aim is achieved within the framework of the present invention thanks to an acoustic insulation wall system, comprising: - a soul extending along a main plane, - a first facing plate and a planar wall structure, the first plate and the structure being arranged on either side of the core and each extending in a plane parallel to the main plane, the first plate and the structure being mounted fixed to the core, the system having a first stiffness k; in compression strictly less than 30,000 Nm *, preferably strictly less than 20,000 Nm *, the first stiffness k, being measured by deforming the first plate by a first length b, in a direction perpendicular to the main plane at a point on the first plate, preferably towards the structure, the first length ô7 being less than or equal to a limit length ô / „„ between 1 pm and 50 mm, in particular between 5 pm and 5 mm and preferably between 10 pm and 1 mm.

[0006] The present invention is advantageously supplemented by the following characteristics, taken individually or in any of their technically possible combinations:

[0007] - the planar wall structure is a second facing plate, the system forming a drywall panel,

[0008] - the first stiffness ki is measured for a deformation excitation frequency of the system between 5 Hz and 30 Hz,

[0009] - the system has a second stiffness k 2 in compression strictly higher to the first stiffness kj, the second stiffness k 2 being measured by deforming the first plate by a second length ô2 strictly greater than the limit length &Um in a direction perpendicular to the main plane at the point of the first plate, preferably towards the structure, the second stiffness k 2 being in particular greater than 30,000 Nm 1 and preferably greater than 50,000 N.m'1,

[0010] - the second stiffness k2 is measured for a deformation excitation frequency of the system between 5 Hz and 30 Hz,

[0011] - the core is formed at least in part by a cellular material,

[0012] - the core extends between a first face and a second face arranged on either side other of the main plane, the core being in contact with the first plate on a part of the first face, another part of the first face being arranged at a distance from the first plate equal to the limit length <5 lim,

[0013] - the core comprises a plurality of bosses defined by the first face, each boss being in contact with the first plate, the maximum thickness of the bosses in the direction perpendicular to the main plane being equal to the limit length <5 lim,

[0014] - the system comprises a network of bosses,

[0015] - the boss network is a regular one-dimensional or two-dimensional network,

[0016] - the cellular material comprises strips parallel to each other forming a first network of strips and other strips parallel to each other forming a second network of strips, each strip having two parallel slices arranged on either side of the main plane, the strips extending along their lengths in the main plane, the strips of the first network being intersected with the strips of the second network, the first face being formed by all the slices on one side of the main plane, the second face being formed by all the slices on the other side of the main plane, a distance between the edges of the strips of the first network forming the first face and between the edges of the strips of the second network forming the first face being equal to the first length ô},

[0017] - the core comprises a first element made of the cellular material and a second element mounted fixed to the first element, the first face of the core being formed by a face of the second element opposite the first element relative to the second element,

[0018] - the first plate comprises a plurality of bosses, each boss being in contact with the core, the maximum thickness of the bosses in the direction perpendicular to the main plane being equal to the limit length <5 / im,

[0019] - the bosses are formed by a material having a loss factor / / higher or equal to 0.1,

[0020] - the material is at least chosen from mineral wool, foam, and a viscoelastic material,

[0021] - the planar wall structure is a second facing plate, the system forming a drywall panel and the system has a third stiffness k3 in compression strictly less than 30,000 N.m1, in particular strictly less than 20,000 N.m1, the third stiffness k3 being measured by deforming the second plate of the first length ôi in a direction perpendicular to the main plane at a point on the second plate, preferably towards the first plate,

[0022] - the third stiffness k3 is measured for a deformation excitation frequency of the system between 5 Hz and 30 Hz,

[0023] - the planar wall structure is a second facing plate, the system forming a drywall panel and the system has a fourth stiffness k 4 in compression strictly greater than the third stiffness k 3, the fourth stiffness k 4 being measured by deforming the second plate of the second length ô2 in a direction perpendicular to the main plane at the point of the second plate, preferably towards the first plate, the fourth stiffness k 4 being preferably greater than 30,000 N.m1, in particular greater than 50,000 Nm ',

[0024] - the fourth stiffness k4 is measured for a deformation excitation frequency of the system between 5 Hz and 30 Hz,

[0025] - the core comprises a first contact zone, coinciding with the first face, the first contact zone being fixedly mounted on the first plate, the core comprising a second contact zone, coinciding with the first face, the second contact zone being fixedly mounted on the first plate, the core also comprising a third contact zone, coinciding with the first face, the third contact zone being in contact with the first plate and devoid of attachment to the first plate such that the contact between the first plate and the third contact zone can be broken under the effect of mechanical stress applied to the first plate,

[0026] - the first contact zone and the second contact zone are fixedly mounted at the first plate by means of glue, and the third contact area is without glue,

[0027] - the core comprises a plurality of support devices for bracing the first plate and the structure, each device comprising: a first plate, the first plate comprising a third face adapted to be fixedly mounted to the first facing plate, all of the third faces forming the first face a second plate, the second plate comprising a fourth face adapted to be fixedly mounted to the facing structure, the set of fourth faces forming the second face at least one spacer rod, the spacer rod being fixedly mounted to the first plate and the second plate and extending between the first plate and the second plate.

[0028] - the device has a fifth stiffness k 5 in compression between the first plate and the second plate strictly less than 30,000 Nm *, preferably strictly less than 20,000 Nm *, the fifth stiffness k 5 being measured by deforming the first plate of the first length ô7 in a direction perpendicular to the main plane at a point from the first plate towards the second plate,

[0029] - the device has a sixth stiffness k 6 in compression strictly higher at the fifth stiffness k 5, the sixth stiffness k 6 being measured by deforming the first plate of the first length ô7 in a direction perpendicular to the main plane at a point from the first plate towards the second plate, the sixth stiffness k 6 being in particular greater than 30,000 Nm 1 and preferably greater than 50,000 N.m1,

[0030] - the device has a first angular stiffness kO, in bending measured between the first plate and the second plate strictly less than 105 N.mm.rad 1, in particular strictly less than 5.104 N.mm.rad 1 and preferably strictly less than 104 N.mm.rad 1 Description of figures

[0031] Other characteristics, aims and advantages of the invention will emerge from the following description, which is purely illustrative and non-limiting, and which must be read in conjunction with the appended drawings in which:

[0032] [Fig.l] - [Fig.l] schematically illustrates a section of a system according to an embodiment of the invention,

[0033] [Fig.2] - [Fig.2] schematically illustrates a section of a system according to an embodiment of the invention,

[0034] [Fig.3] - [Fig.3] illustrates compression stiffnesses of a known system and of a system according to an embodiment of the invention for different amplitudes of displacement of a wall of each of the systems,

[0035] [Fig.4] - [Fig.4] schematically illustrates a system according to an embodiment of the invention,

[0036] [Fig.5] - [Fig.5] schematically illustrates a section of a system according to an embodiment of the invention,

[0037] [Fig.6] - [Fig.6] schematically illustrates a network of bosses of a system according to an embodiment of the invention,

[0038] [Fig.7] - [Fig.7] schematically illustrates a network of bosses of a system according to an embodiment of the invention,

[0039] [Fig.8] - [Fig.8] schematically illustrates a network of bosses of a system according to an embodiment of the invention,

[0040] [Fig.9] - [Fig.9] schematically illustrates a network of bosses of a system according to an embodiment of the invention,

[0041] [Fig. 10] - [Fig. 10] schematically illustrates a section of a system according to an embodiment of the invention,

[0042] [Fig. 11] - [Fig. 11] schematically illustrates a section of a system according to an embodiment of the invention,

[0043] [Fig. 12] - [Fig. 12] schematically illustrates a section of a system according to an embodiment of the invention,

[0044] [Fig. 13] - [Fig. 13] schematically illustrates a section of a system according to an embodiment of the invention,

[0045] [Fig. 14] - [Fig. 14] schematically illustrates a section of a system according to an embodiment of the invention,

[0046] [Fig. 15] - [Fig. 15] schematically illustrates a section of a drywall panel comprising a core formed by spacer devices,

[0047] [Fig. 16] - [Fig. 16] schematically illustrates a section of a bracing device,

[0048] [Fig. 17] - [Fig. 17] schematically illustrates a section of a bracing device,

[0049] [Fig. 18] - [Fig. 18] schematically illustrates a section of a bracing device,

[0050] [Fig. 19] - [Fig. 19] schematically illustrates a section of a bracing device,

[0051] [Fig.20] - [Fig.20] illustrates the acoustic insulation of a known system and two systems according to embodiments of the invention over a range of frequencies.

[0052] Throughout the figures, similar elements bear identical references. Definitions

[0053] A stiffness, in particular a compressive stiffness of a system and particularly of a drywall panel, between two points or two faces, can be calculated in a known manner using a computer program implementing a numerical mechanical simulation of the system by the finite element method. In particular, such a simulation can be implemented by predetermining the geometry of the system, its material(s), and the boundary conditions applied to the system. The document Guigou-Carter et al. (Guigou-Carter, C., Foret, R., Igeleke, A., & Bailhache, S., 2012, April, Characterization of metallic studs used in gypsum board single frame walls, in Acoustics 2012) describes a method for measuring a compressive stiffness of drywall panels comprising frame elements using modeling by the finite element method.

[0054] “Stiffness” means a stiffness measured for an excitation frequency of the element whose stiffness is measured between 5 Hz and 30 Hz. This frequency range defines a regime called “quasi-static”. Indeed, this frequency range makes it possible to measure a stiffness independent of the dimensions of the system and the boundary conditions applied at the edge of the system. Detailed description of the invention

[0055] General architecture of system 1

[0056] [Fig.l] and [Fig.2] illustrate a system 1. The system 1 comprises a core 2 extending along a main plane 3. It also comprises a first facing plate 41 and a panar wall structure 42.

[0057] The planar wall structure 42 may be selected from a wall, a second facing board, for example a second plasterboard facing board, a floor and a ceiling. In the case of a second facing board, the system 1 forms a drywall panel. The structure may also be made of concrete.

[0058] A facing plate, such as the first facing plate 41 and / or the second facing plate 42, may be a plasterboard. The thickness of a facing plate may be between 5 mm and 20 mm, preferably between 10 mm and 16 mm.

[0059] The first plate 41 and the structure 42 are arranged on either side of the core 2. They each extend in a plane parallel to the main plane 3. The first plate 41 and the structure 42 are mounted fixed to the core 2.

[0060] The system 1 has a first stiffness k; in compression strictly less than 30,000 Nm ', and preferably strictly less than 20,000 Nm *. The first stiffness kj is measured by deforming the first plate 41 by a first length ô7 in a direction perpendicular to the main plane 3, at a point on the first plate 41, preferably towards the structure 42.

[0061] The first length ô7 is less than or equal to a limit length ôiim between 1 pm and 50 mm, in particular between 5 pm and 5 mm and preferably between 10 pm and 1 mm.

[0062] Thus, during a deformation of an amplitude which can be driven by an acoustic wave, due to a stiffness of the first wall 41 significantly smaller than the known wall stiffnesses, the energy of an acoustic wave incident on the first wall 41 is dissipated by the first wall 41, and the acoustic wave is damped. This makes it possible to increase the acoustic insulation of a system 1. Indeed, known systems comprise a wall having a stiffness of the order of 500,000 Nm *.

[0063] The system 1 may have a second stiffness k 2 in compression strictly greater than the first stiffness k j. The second stiffness k 2 is measured by deforming the first plate 41 by a second length ô2 strictly greater than the limit length ô / im in a direction perpendicular to the main plane 3 at the point of the first plate 41, preferably towards the structure 42. The second stiffness k 2 may be in particular greater than 30,000 N.m1, in particular greater than 50,000 Nm 1 , and preferably greater than 100,000 Nm '. Thus, the system 1 has a non-linear and increasing stiffness when the amplitude of the applied deformation increases. With reference to [Fig.3], curve (a) illustrates a known system exhibiting a linear and quasi-constant stiffness strictly greater than 30,000 Nm 1 for a deformation exhibiting an amplitude ranging from 0.3 mm to 5.7 mm.Curve (b) illustrates a system 1 according to an embodiment of the invention, in which, for a first length ôi less than or equal to a limit length ô / im equal to 0.9 mm, the first stiffness k; is equal to 7500 Nm '. For a second length ô2 strictly greater than the limit length ô / im, the system 1 has a second stiffness k 2 strictly greater than the first stiffness k j. The system 1 thus has both a small stiffness for small deformations, which makes it possible to damp the acoustic waves, and a large stiffness for larger deformations, which makes it possible to ensure sufficient mechanical rigidity of the system for its use in the . construction. This allows System 1 to provide superior sound insulation to known systems of equal mechanical strength.

[0064] Symmetrically, in the case where the structure 42 is a second facing plate, the system 1 being a drywall panel, the panel 1 may have a third stiffness k 3 in compression strictly less than 30,000 Nm *, in particular strictly less than 20,000 Nm *. The third stiffness k 3 is measured by deforming the second plate by the first length ô7 in a direction perpendicular to the main plane 3 at a point on the second plate 42, preferably towards the first plate 41. Thus, during a deformation of an amplitude which can be driven by an acoustic wave, due to a stiffness of the first wall 41 and the second wall 42 significantly smaller than the known wall stiffnesses, the energy of an acoustic wave incident on the first wall 41 is dissipated by the first wall 41 and by the second wall 42, and the wave is damped.This makes it possible to increase the acoustic insulation of a system 1 with respect to the acoustic insulation of a system in which only the first wall 41 can dissipate the energy of an acoustic.

[0065] In the case where the structure 42 is a second facing plate, the system 1 being a drywall panel, the system 1 may have a fourth stiffness k 4 in compression strictly greater than the third stiffness k 3. The fourth stiffness k 4 is measured by deforming the second plate 42 of the second length 62 in a direction perpendicular to the main plane 3 at the point of the second plate 42, preferably towards the first plate 4L. Preferably, the fourth stiffness k 4 is greater than 30,000 N.m'1, in particular greater than 50,000 Nm '. Thus, the non-linearity of the stiffness of the system 1 is increased with respect to a system 1 comprising only a first wall 41 having a non-linear stiffness.

[0066] Alveolar core 2

[0067] The core 2 may be formed at least in part by a cellular material. The cellular material may be a cardboard cellular structure. The cellular material may be formed by a network of cardboard strips, each cardboard strip extending along a plane perpendicular to the main plane 3. Thus, it is possible to lighten the system 1 compared to a system comprising a core formed by a metal frame.

[0068] The core 2, comprising a cellular material or not, can extend between a first face 7 and a second face 8 arranged on either side of the main plane 3. When the core 2 is formed by the cellular material described above, the first face 7 and the second face 8 can be formed by the edges of the different strips of cardboard.

[0069] The core 2 may be in contact with the first plate 41 on a portion of the first face 7, another portion of the first face 7 being arranged at a distance from the first plate 41 equal to the limit length <5 Um. Thus, a portion of the first plate 41 may be deformed in bending until it is in contact with the core 2, after having been deformed by a limit length <5 lim. After having been in contact with the core 2, the compressive stiffness of the system 1 may be approximated by the stiffness of the walls and the core in contact. The wall 1 may thus have the characteristics of the compressive stiffness defined above. An equivalent structure may be defined between the structure 42 and the second face 8.

[0070] The core 2 may comprise openings, preferably through openings. The core 2 may be formed by strips formed from cellular material separated from each other. In this embodiment of the invention, the limit length <5 lim is equal to the distance separating the first plate 41 from the structure 42.

[0071] First plate 41 and second plate 42

[0072] The first plate 41 and / or the second plate 42 may have a thickness greater than or equal to 5 mm, in particular greater than or equal to 8 mm and preferably between 10 mm and 15 mm. The first plate 41 and / or the second plate 42 may have a length between 2 m and 3 m. The first plate 41 and / or the second plate 42 may have a width between 1 m and 3 m. The first facing plate 41 and / or the second facing plate 42 may be chosen from a plasterboard, a cement board, a wood board, a wood composite board (e.g. chipboard), a board formed from a plastic material and a board formed from a metallic material.

[0073] Bosses 9

[0074] With reference to [Fig.5], [Fig.6], [Fig.7], [Fig.8], [Fig.9], [Fig.10], in [Fig.12] and in [Fig.13], the parts of the first face 7 in contact or at a distance from the first plate 41 may be implemented by bosses 9. The core 2 may comprise a plurality of bosses 9 defined by the first face 7 and / or by the second face 8. Each boss 9 may be in contact with the first plate 4L. The maximum thickness of the bosses 9 in the direction perpendicular to the main plane 3 may be equal to the limit length <5 Um. The system 1 may comprise a network of bosses 9. With reference to [Fig.6], [Fig.7] and [Fig.8], the network of bosses 9 may be a one-dimensional regular network. With reference to [Fig.9], the network of bosses 9 may be a two-dimensional regular network. Symmetrically, the parts of the second face 8 in contact or at a distance from the second plate 42 can be implemented by bosses 9. Each boss 9 can be in contact with the second plate 42.

[0075] With reference to [Fig. 6], the cellular material may comprise strips parallel to each other forming a first network of strips and other strips parallel to each other forming a second network of strips. Each strip has two parallel edges arranged on either side of the main plane 3. The strips extend along their lengths in the main plane 3. The strips of the first network are intersected with the strips of the second network. The first face 7 is formed by all the edges on one side of the main plane 3. The second face 8 is formed by all the edges on the other side of the main plane 3. A distance between the edges of the strips of the first network forming the first face and between the edges of the strips of the second network forming the first face is equal to the first length ô}.

[0076] With reference to [Fig. 7], the boss network 9 may comprise a third network of strips extending from one side of the first face 7 to another opposite side of the first face 7. The strips may be parallel to each other and have a thickness equal to the limit length <5 μm. A section of the first face 7 in a plane perpendicular to the direction in which the strips extend may have a notch shape. With reference to [Fig. 8], the strips may be rounded in a direction perpendicular to the direction in which they extend. The first face 7 may form a sinusoid in a plane perpendicular to the direction in which the strips extend. The strips may form a network. The network may have a pitch, preferably between 1 mm and 50 cm, in particular between 5 mm and 10 cm.Symmetrically, the network of bosses 9 may be a network of strips extending from one side of the second face 8 to another opposite side of the second face 8.

[0077] With reference to [Fig. 10], the core 2 may be formed by a first element 10 and a second element 11. The first element 10 may comprise the cellular material. The second element 11 may be fixedly mounted to the first element 10. The first face 7 of the core 2 may be formed by a face of the second element 11 opposite the first element 10 with respect to the second element 11. Thus, the manufacture of the bosses 9 of the first face 7 may be simplified with regard to machining of a cellular material. For example, the first face may be molded.

[0078] With reference to [Fig. 11], the first plate 41 may comprise a plurality of bosses 9. Each boss 9 is in contact with the core 2. The maximum thickness of the bosses 9 in the direction perpendicular to the main plane 3 may be equal to the limit length <5 lim. Thus, it is possible to simplify the manufacture of the core 2, for example by manufacturing a core 2 having a first flat face 7, while giving the system 1 the previously defined rigidity properties.

[0079] Dissipating material

[0080] With reference to [Fig. 12] and [Fig. 13], the bosses 9 may be formed by a material having a loss factor q greater than or equal to 0.1, in particular greater than or equal to 0.2 and preferably greater than or equal to 1. The material may be at least chosen from mineral wool, foam and a viscoelastic material. For example, the surface of the bosses 9 may be covered with the material. Through portions of the core 2 may be formed by the material, as illustrated by [Fig. 13]. Thus, it is possible to reduce the stiffness of the system 1 for deformations resulting in a displacement of an amplitude less than the limit length <5 lim, while maintaining an equal stiffness for displacements of an amplitude greater than the limit stiffness. In other words, it is possible to increase the non-linearity of the compressive stiffness of the system 1 with respect to a system 1 without bosses comprising a dissipating material.

[0081] With reference to [Fig. 14], a stiffness, preferably the first stiffness kj, can be measured by deforming the first plate 41 by the first length ô7 in a direction perpendicular to the main plane 3 at a point on the first plate 41 towards the outside of the system 1. The core 2 may comprise a first contact zone 12 which coincides with the first face 7. The first contact zone 12 is fixedly mounted on the first plate 4L. The core 2 comprises a second contact zone 13, which coincides with the first face 7. The second contact zone 13 is fixedly mounted on the first plate 4L. The core 2 also comprises a third contact zone 14 which coincides with the first face 7.The third contact zone 14 is in contact with the first plate 41 and is not fixed to the first plate 41 so that the contact between the first plate 4 and the third contact zone 14 can be broken under the effect of a mechanical stress applied to the first plate 4L. Thus, an acoustic wave propagating from the core 2 towards the first plate 41 deforms the first plate 41 towards the outside of the system 1. This allows dissipation of the acoustic wave and thus an increase in the acoustic insulation provided by the system 1. The first contact zone 12 and the second contact zone 13 can be mounted fixed to the first plate 41 by means of an adhesive. In this case, the third contact zone 14 is not provided with adhesive.

[0082] Core 2 comprising support devices 15 for the bracing of the first plate 41 and the structure 42

[0083] With reference to [Fig.15], [Fig.16], [Fig.17], [Fig.18] and [Fig.19], the core 2 may comprise a plurality of support devices 15 for bracing the first plate 41 and the structure 42.

[0084] With reference to [Fig. 16] and [Fig. 17], a device 15 may comprise a first plate 16. The first plate 16 comprises a third face 18 adapted to be fixedly mounted to the first facing plate 41. All of the third faces 18 form the first face 7. The device 15 may comprise a second plate 17. The second plate 17 comprises a fourth face 19 adapted to be fixedly mounted to the facing structure 42. All of the fourth faces 18 form the second face 7. The device may comprise at least one spacing rod 20. The spacing rod 20 is fixedly mounted to the first plate 16 and to the second plate 17 and at least one spacing rod 20 extends between the first plate 16 and the second plate 17. Thus, by using the point spacing devices 15 defined above, carbon dioxide emissions during the manufacture of the system 1 are reduced, and in particular during the manufacture of the core 2, in particular with regard to a system comprising a core formed by a metal frame.

[0085] The device 15 may have a fifth stiffness k 5 in compression between the first plate 16 and the second plate 17 strictly less than 30,000 Nm *, preferably strictly less than 20,000 Nm *. The fifth stiffness k 5 is measured by deforming the first plate 16 by the first length ô7 in a direction perpendicular to the main plane 3 at a point from the first plate 16 towards the second plate 17. Thus, the system 1 may have the first stiffness kj defined above in compression.

[0086] The device 15 may have a sixth stiffness k 6 in compression strictly greater than the fifth stiffness k 5. The sixth stiffness k 6 is measured by deforming the first plate 16 by the first length ô7 in a direction perpendicular to the main plane 3 at a point from the first plate 16 towards the second plate 17. The sixth stiffness k 6 may be greater than 30,000 Nm 1 and preferably greater than 50,000 Nm '. Thus, the system 1 may have the second stiffness k 2 defined above in compression.

[0087] With reference to [Fig.16] and [Fig.17], the first plate 16 may be connected to the spacing rod by a flexible membrane 21. The spacing rod 20 may comprise a rib 22 spaced by the limit length <5 lim from the first plate 16. Thus, for a compression of an amplitude equal to a first length ô7 the device 15 has the fifth stiffness k 5. For a compression of a greater amplitude ô2 strictly greater than the limit length ô / im, the rib 22 comes into abutment with the first plate 16 so that the device 15 has the sixth stiffness k 6-

[0088] The device 15 may have a first angular stiffness kQ] in bending measured between the first plate 16 and the second plate 17 strictly less than 105 N.mm.rad ', in particular strictly less than 5.104 N.mm.rad 1 and preferably strictly less than 104 N.mm.rad 1 The first angular stiffness kO, in bending can be measured between the first plate 16 and the second plate 17 by deforming the device 15 by a first angle a7 less than or equal to a limit angle atim. Thus, the system 1 can have the first stiffness kj defined above in compression.

[0089] The device 15 may have a second angular stiffness kQ2 in bending measured between the first plate 16 and the second plate 17 greater than 105 N.mm.rad, in particular greater than 106 N.mm.rad 1 and preferably greater than 2. 10 6 N.mm.rad Thus, the system 1 may have the second stiffness k 2 defined above in compression.

[0090] With reference to [Fig.18] and [Fig.19], the first plate 16 and the second plate 17 may be separated by a constant length L j. One of the spacing rods 20 may be fixedly mounted in the center of the second plate 17. A plurality of spacing rods 20 may be fixedly mounted on the edge of the second plate 17, having a second length L 2 strictly less than the first length L Thus, during an angular deformation of a second angle a2 greater than a limit angle a / im, the first plate 15 comes into abutment with one end of a spacing rod 20 fixedly mounted at the edge of the second plate 17, which makes it possible to give the device 15 the second angular rigidity kQ2 defined previously.

[0091] Results

[0092] With reference to [Fig.20], a system 1 according to an embodiment of the invention makes it possible to increase the acoustic insulation compared to known systems, in particular in a frequency range between 250 Hz and 4000 Hz. Curve (a) illustrates the acoustic insulation R of a known system. Curve (b) illustrates the acoustic insulation of a system according to an embodiment of the invention, comprising a core formed from cellular material, the core comprising openings such that it is formed by strips of cellular material separated by a space. Curve (c) illustrates the acoustic insulation of a system according to an embodiment of the invention, comprising a core formed from cellular material, the core comprising openings such that it is formed by strips of cellular material separated by a space.

Claims

Claims

1. Soundproofing wall system (1), comprising: - a core (2) extending along a main plane (3), - a first facing plate (41) and a planar wall structure (42), the first plate (41) and the structure (42) being arranged on either side of the core (2) and each extending in a plane parallel to the main plane (3), the first plate (41) and the structure (42) being mounted fixed to the core (2), characterized in that: the system (1) has a first stiffness kj in compression strictly less than 30,000 Nm *, preferably strictly less than 20,000 N.m *, the first stiffness kj being measured by deforming the first plate (41) by a first length ô7 in a direction perpendicular to the main plane (3) at a point on the first plate (41), preferably towards the structure (42), the first length ô; being less than or equal to a limit length ôiim of between 1 pm and 50 mm, in particular of between 5 pm and 5 mm and preferably of between 10 pm and 1 mm and has a second stiffness k 2 in compression strictly greater than the first stiffness k ;, the second stiffness k 2 being measured by deforming the first plate (41) by a second length ô2 strictly greater than the limit length &Um in a direction perpendicular to the main plane (3) at the point on the first plate (41), preferably towards the structure (42), the second stiffness k 2 being in particular greater than 30,000 Nm 1 and preferably greater than 50,000 N.m1.

2. The acoustic insulation wall system (1) of claim 1, wherein the planar wall structure (42) is a second facing plate, the system (1) forming a drywall panel.

3. Soundproofing wall system (1) according to one of the preceding claims, in which the core (2) is formed at least in part by a cellular material.

4. Soundproofing wall system (1) according to the preceding claim, in which the core (2) extends between a first face (7) and a second face (8) arranged on either side of the main plane (3) and in which the core (2) is in contact with the first plate (41) on a part of the first face (7), another part of the first face (7) being arranged at a distance from the first plate (41) equal to the limit length <5 Um.

5. Soundproofing wall system (1) according to the preceding claim, in which the core (2) comprises a plurality of bosses (9) defined by the first face (7), each boss (9) being in contact with the first plate (41), the maximum thickness of the bosses (9) in the direction perpendicular to the main plane (3) being equal to the limit length <5 lim.

6. Soundproofing wall system (1) according to the preceding claim, comprising a network of bosses (9), in which the network of bosses (9) is preferably a regular one-dimensional or two-dimensional network.

7. Soundproofing wall system (1) according to one of claims 3 to 6, in which the cellular material comprises strips parallel to each other forming a first network of strips and other strips parallel to each other forming a second network of strips, each strip having two parallel edges arranged on either side of the main plane (3), the strips extending along their lengths in the main plane (3), the strips of the first network being intersected with the strips of the second network, the first face (7) being formed by all the edges on one side of the main plane (3), the second face being formed by all the edges on the other side of the main plane (3), a distance between the edges of the strips of the first network forming the first face (7) and between the edges of the strips of the second network forming the first face (8) being equal to the first length ô7.

8. Soundproofing wall system (1) according to one of claims 3 to 7, in which the core (2) comprises a first element (10) made of the cellular material and a second element (11) mounted fixed to the first element (10), the first face (7) of the core (2) being formed by a face of the second element (11) opposite the first element (10) relative to the second element (H).

9. A soundproofing wall system (1) according to claim 3, wherein the first plate (41) comprises a plurality of bosses (9), each boss (9) being in contact with the core (2), the maximum thickness of the bosses (9) in the direction perpendicular to the main plane (3) being equal to the limiting length fi

10. hm' Soundproofing wall system (1) according to one of claims 5 to 9, in which the bosses (9) are formed by a material having a loss factor / / greater than or equal to 0.1, the material preferably being at least chosen from mineral wool, foam, and viscoelastic material.

11. Soundproofing wall system (1) according to one of claims 1 to 10, in which the planar wall structure (42) is a second facing plate, the system (1) forming a drywall panel, the system (1) having a third stiffness k 3 in compression strictly less than 30,000 Nm *, in particular strictly less than 20,000 Nm *, the third stiffness k 3 being measured by deforming the second plate by the first length ô; in a direction perpendicular to the main plane (3) at a point on the second plate, preferably towards the first plate (41).

12. Soundproofing wall system (1) according to claim 11, the system (1) having a fourth stiffness k 4 in compression strictly greater than the third stiffness k 3, the fourth stiffness k 4 being measured by deforming the second plate (42) of the second length ô2 in a direction perpendicular to the main plane (3) at the point of the second plate (42), preferably towards the first plate (41), the fourth stiffness k 4 being preferably greater than 30,000 Nm *, in particular greater than 50,000 Nm '.

13. Soundproofing wall system (1) according to one of claims 1 to 12, wherein the core (2) comprises a first contact zone (12), coinciding with the first face (7), the first contact zone (12) being fixedly mounted on the first plate (41), the core (2) comprising a second contact zone (13), coinciding with the first face (7), the second contact zone (13) being fixedly mounted on the first plate (41), the core (2) also comprising a third contact zone (14), coinciding with the first face (7), the third contact zone (14) being in contact with the first plate (41) and devoid of attachment to the first plate (41) so that the contact between the first plate (41) and the third contact zone (14) can be broken under the effect of mechanical stress applied to the first plate (41).

14. Soundproofing wall system (1) according to claim 13, wherein the first contact zone (12) and the second contact zone (13) are fixedly mounted to the first plate (41) by means of an adhesive, and wherein the third contact zone (14) is free of adhesive.

15. Soundproofing wall system (1) according to one of the preceding claims, wherein the core comprises a plurality of support devices (15) for the spacing of the first plate (41) and the structure (42), each device (15) comprising: - a first plate (16), the first plate (16) comprising a third face (18) adapted to be fixedly mounted to the first facing plate (41), the set of third faces (18) forming the first face (7) - a second plate (17), the second plate (17) comprising a fourth face (19) adapted to be fixedly mounted to the structure (42), the set of fourth faces (18) forming the second face (7) - at least one spacer rod (20), the spacer rod (20) being fixedly mounted to the first plate (16) and to the second plate (17) and extending between the first plate (16) and the second plate (17).

16. Soundproofing wall system (1) according to the preceding claim, in which the device (15) has a fifth stiffness k 5 in compression between the first plate (16) and the second plate (17) strictly less than 30,000 Nm *, preferably strictly less than 20,000 Nm *, the fifth stiffness k 5 being measured by deforming the first plate (16) by the first length ô7 in a direction perpendicular to the main plane (3) at a point from the first plate (16) towards the second plate (17).

17. Soundproofing wall system (1) according to the preceding claim, in which the device (15) has a sixth stiffness k 6 in compression strictly greater than the fifth stiffness k 5, the sixth stiffness k 6 being measured by deforming the first plate (16) by the first length ô7 in a direction perpendicular to the main plane (3) at a point from the first plate (16) towards the second plate (17), the sixth stiffness k 6 being in particular greater than 30,000 N.m1 and preferably greater than 50,000 N.m1.

18. Soundproofing wall system (1) according to one of claims 15 to 17, in which the device (15) has a first angular stiffness kQ] in bending measured between the first plate (16) and the second plate (17) strictly less than 105 N.mm.rad *, in particular strictly less than 5.104 N.mm.rad1 and preferably strictly less than 104 N.mm.rad 1

Images