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Nonlinear dynamic absorbers and their use for sound insulation

A nonlinear dynamic and absorber technology, applied in instruments, shock absorbers, shock absorbers, etc., can solve problems such as reducing the sound transmission of walls

Inactive Publication Date: 2020-02-07
SAINT GOBAIN PLACO SAS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The applicant recognizes that the use of energy pumping to reduce the sound transmission of a wall separating two spaces of a building or between the interior and exterior of a building has not heretofore been conceived

Method used

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  • Nonlinear dynamic absorbers and their use for sound insulation
  • Nonlinear dynamic absorbers and their use for sound insulation
  • Nonlinear dynamic absorbers and their use for sound insulation

Examples

Experimental program
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Embodiment Construction

[0071] figure 1 Already discussed in the introduction. It shows the technical problem to be solved by the present invention, namely the sound transparency of a double wall at a low frequency (approximately 100-150 Hz) called the "breathing" frequency (f 0 ) increases, corresponding to the antiphase resonance of the two thin plates of the double wall.

[0072] figure 2 A nonlinear dynamic absorber 9 of the present invention is shown in , which comprises a flattened Y-shaped fastening member 4 . This fastening member comprises a bottom 7 from which two branches 6 extend symmetrically. The end of each branch 6 is provided with an embedded member 5, the clamping of which can be adjusted by means of screws. Two insert members 5 hold the end portions of the metal lamination 1 (not visible in the figure). The middle part 2b of the lamination is free to vibrate when it is activated by the vibration of the main resonator (not shown) to which the nonlinear dynamic absorber 9 is fa...

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Abstract

The invention relates to a construction element comprising a thin plate (11) of rigid material and at least one non-linear power absorber (9), the non-linear power absorber (9) having two end parts (2a) The lamination (1) and a non-linear spring-functioning central part (2b) of the lamination, - mass point (3), which is fastened to the non-linear spring-functioning middle part (2b) of the lamination, - fastening member (4) , which allows the two end parts (2a) of the lamination (1) to be fastened to solid supports, so that the middle part (2b) with a non-linear spring function can oscillate around one or more of its equilibrium positions, non-linearly The power absorber (9) is rigidly fastened to the sheet (11) by fastening members (4). The invention also relates to a partition wall comprising such a construction element, and to the use of such an absorber or construction element to reduce the sound transmission of a wall.

Description

technical field [0001] The present invention relates to a nonlinear dynamic absorber and its use for improving the sound insulation between two spaces separated by a wall. Background technique [0002] Acoustic insulation between two rooms separated by a wall is typically ensured either by increasing the surface density of the wall or by lining said wall. In the case of double partition walls, an acoustic insulation material, typically mineral wool mats or resilient foam, may be inserted in the air gap between the two partitions. [0003] From an acoustic point of view, such a double wall, whether lined with insulating material or not, behaves as a mass-spring-mass system at low frequencies, where the air gap or lining of insulating material between the two sheets acts to connect them to each other. The action of the spring of the connection. figure 1 It is shown how the sound attenuation index (NF EN ISO 140-3) of such a double partition wall with or without insulation li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B2/74F16F7/116G10K11/04G10K11/172
CPCE04B2/7409F16F7/116G10K11/04G10K11/172E04B1/8209F16F15/022G10K11/16F16F7/104
Inventor P-O.马泰S.贝利齐M.帕什巴R.蓬科S.贝尔热
Owner SAINT GOBAIN PLACO SAS