CN-122013929-A - Light sound-insulation assembled wallboard and preparation method thereof

CN122013929ACN 122013929 ACN122013929 ACN 122013929ACN-122013929-A

Abstract

The invention relates to a light sound-insulation assembled wallboard and a preparation method thereof, wherein the wallboard comprises a framework, two sides of the framework are provided with facing layers, a plurality of resonance chambers are arranged in the framework, and magnetic suspension inertial damping units are arranged in the resonance chambers; the preparation method comprises the steps of preparing the skeleton by adopting a 3D printing technology or a mold forming technology, assembling the magnetic levitation inertia damping unit and tuning, pouring and solidifying the matrix, installing the facing layer and viscoelasticity decoupling connecting pieces. According to the invention, by introducing the local resonance super-structural material formed by the magnetic suspension inertial damping units, the wall body realizes excellent low-frequency sound insulation performance under the condition that the physical surface density is only 30% -40% (about 60-100kg/m 2 ) of the traditional concrete wall, and the weight-counting sound insulation quantity (Rw) can be improved by more than 15 dB.

Inventors

CUI LI
HOU CHAO
DU SHAOHUA
ZHAI SHENGTIAN
SUN YINGHAO
HAI RAN
Wang Yazuo
NIU XIAOLONG
REN WENFENG
ZHENG YI
SUN ZHIHAO
MA JIANJUN
WANG CHAOSHENG

Assignees

河南科技大学

Dates

Publication Date: 20260512
Application Date: 20260127

Claims (9)

1. A light sound insulation assembled wallboard is characterized by comprising a framework, wherein facing layers are arranged on two sides of the framework, a plurality of resonance cavities are arranged in the framework, magnetic suspension inertial damping units are arranged in the resonance cavities, each magnetic suspension inertial damping unit comprises a non-magnetic shell and an inertial mass core arranged in the shell, a first permanent magnet array is arranged on the inner wall of the shell, a second permanent magnet array which is homopolar relative to the first permanent magnet array is arranged on the surface of the inertial mass core, the inertial mass core is suspended in the shell through magnetic repulsion force generated by the first permanent magnet array and the second permanent magnet array to form a local resonance system, functional matrixes are filled in gaps between the framework and the magnetic suspension inertial damping units and gaps between the framework and the facing layers, and natural frequencies of the magnetic suspension inertial damping units are matched with noise frequencies attenuated by targets so as to attenuate sound wave transmission through anti-resonance coupling effects.
2. A lightweight sound insulating fabricated panel according to claim 1, wherein the resonant cavities are regularly arranged within the framework, the resonant cavities being of a honeycomb structure.
3. A lightweight sound insulating fabricated panel according to claim 1, wherein the skeleton is made of porous glass ceramic-UHPC.
4. A lightweight sound insulating fabricated panel according to claim 1, wherein the inertial mass core is a tungsten alloy sphere.
5. The light sound-proof assembled wallboard of claim 1, wherein the permanent magnets in the first array of permanent magnets are spatially symmetric on the inner wall of the housing, and correspondingly, the permanent magnets in the second array of permanent magnets are spatially symmetric on the surface of the inertial mass core.
6. A lightweight sound insulating fabricated panel according to claim 1, wherein the functional matrix is a porous material having a porous structure with a gradient of porosity.
7. A lightweight sound insulating fabricated panel according to claim 6, wherein the functional matrix is a hydrophobic silica aerogel modified foam concrete.
8. A lightweight sound insulating fabricated panel according to claim 1, wherein the panel edges are further provided with viscoelastic decoupling connectors.
9. A method of making a lightweight sound insulating fabricated panel for use in making a fabricated panel as claimed in any one of claims 1 to 7, comprising the steps of: s1, preparing a framework, namely preparing the framework by adopting a 3D printing technology or a mold forming technology, and forming a resonance cavity in the framework; S2, assembling and tuning the magnetic suspension inertial damping unit, namely adjusting the magnetic flux of the first permanent magnet array and the second permanent magnet array and the distance between the magnetic flux of the first permanent magnet array and the distance between the magnetic flux of the second permanent magnet array according to the thickness of a wall body and the sound insulation target frequency, and embedding the magnetic suspension inertial damping unit into a resonance cavity and locking the magnetic suspension inertial damping unit; S3, pouring and solidifying the matrix, namely injecting the functional matrix into a gap in the framework, vibrating and compacting under a negative pressure environment, and forming a primary wallboard through steam curing; S4, installing the facing layers on two sides of the primary wallboard through hot pressing and installing the viscoelastic decoupling connecting pieces at the edges of the wallboard.

Description

Light sound-insulation assembled wallboard and preparation method thereof Technical Field The invention relates to the field of green building materials, in particular to a light sound-insulation assembled wallboard and a preparation method thereof. Background With the increase of the demands of residents on living quality, the indoor acoustic environment comfort has become one of the core indexes for measuring 'good houses'. However, existing residential partition technologies often face the contradiction that "lightweight" and "sound insulation" are difficult to compromise. Although the traditional brickwork or concrete wall has good sound insulation performance, the self weight is large (the surface density is usually more than 200kg/m 2), the load and the foundation cost of the building structure are increased, and the wet operation of the traditional brickwork or concrete wall is not in line with the current development trend of industrialization and assembly of the building. On the other hand, although light walls such as light steel joist gypsum boards and Autoclaved Lightweight Concrete (ALC) boards are light in dead weight and convenient to construct, the sound insulation performance of the light walls is particularly seriously insufficient in the isolation capability of low-frequency impact noise such as footstep sound and heavy falling, and hollow feeling is easy to generate during knocking, so that living experience is influenced. In the prior art, rock wool and glass wool are often filled in a light wall cavity or a sound insulation felt is additionally arranged to improve sound insulation. Although the middle-high frequency sound insulation is improved, the method is limited by the overall physical quality of the wall, the blocking effect on low-frequency noise with longer wavelength and strong penetrating power is still limited, and the problem of low-frequency sound insulation difference of the light wall cannot be fundamentally solved. Disclosure of Invention Aiming at the problems, the invention provides a light sound-insulation assembled wallboard and a preparation method thereof, and the specific technical scheme is as follows: A light sound-insulation assembled wallboard comprises a framework, wherein facing layers are arranged on two sides of the framework, a plurality of resonant cavities are arranged in the framework, magnetic suspension inertial damping units are arranged in the resonant cavities, each magnetic suspension inertial damping unit comprises a non-magnetic-conductive shell and an inertial mass core arranged in the shell, a first permanent magnet array is arranged on the inner wall of the shell, a second permanent magnet array which is homopolar opposite to the first permanent magnet array is arranged on the surface of the inertial mass core, the inertial mass core is suspended in the shell through magnetic repulsion force generated by the first permanent magnet array and the second permanent magnet array to form a local resonance system, a functional matrix is filled in gaps between the framework and the magnetic suspension inertial damping units and gaps between the framework and the facing layers, and the natural frequency of each magnetic suspension inertial damping unit is matched with noise frequency of target attenuation to attenuate sound wave transmission through anti-resonance coupling effect. Further, the resonance chambers are regularly arranged in the framework, and the resonance chambers are of honeycomb structures. Further, the skeleton is made of porous microcrystalline glass-UHPC. Further, the inertial mass core is a tungsten alloy sphere. Further, the permanent magnets in the first permanent magnet array are distributed in a space symmetry manner on the inner wall of the shell, and correspondingly, the permanent magnets in the second permanent magnet array are distributed in a space symmetry manner on the surface of the inertial mass core. Further, the functional matrix is a porous material with a pore structure, and the porosity of the porous material is distributed in a gradient manner. Further, the functional matrix is a hydrophobic silica aerogel modified foam concrete. Further, the edges of the wall panels are also provided with viscoelastic decoupling connectors. The preparation method of the light sound insulation assembled wallboard is used for preparing the assembled wallboard and comprises the following steps of: s1, preparing a framework, namely preparing the framework by adopting a 3D printing technology or a mold forming technology, and forming a resonance cavity in the framework; S2, assembling and tuning the magnetic suspension inertial damping unit, namely adjusting the magnetic flux of the first permanent magnet array and the second permanent magnet array and the distance between the magnetic flux of the first permanent magnet array and the distance between the magnetic flux of the second permanent magnet array according to the thickness