LOW NOISE DESIGN FOR EARTH-QUAKE PROOF INDUSTRIAL BUILDINGS Russian patent published in 2018 - IPC E04B1/84 E04H9/02 

FIELD: acoustics.

SUBSTANCE: invention relates to the industrial acoustics. Low noise design for earthquake-proof industrial buildings contains a vibration damping insert in the interfloor cavity of the building, which is made in the form of a cylinder of rigid vibration damping material, inside which is axisymmetrically and coaxially placed an elastic core with disks. Along the rod axis the damping disks are rigidly fixed along the whole length of the cavity. Extreme discs are fixed "flush" with the cylinder of the vibration damping material, its ends, in turn, are located "flush" with the side surfaces of the base plate of the inter-floor, and the interfloor damping discs are located uniformly with a pitch not exceeding the internal diameter of the cylinder. Elastic core, axially symmetric and coaxially placed inside the cylinder of the vibration damper insert, made combined and consisting of elastic part in the form of the rod and the damping part made in the form of external coaxial shell of vibration damping material, for example polyurethane. Damping disks fixed rigidly along the entire length of the elastic core are made of combined and consisting of an elastic part in the form of oppositely fixed disks on the elastic core of a solid vibration damping material, for example an “Agat”, “Antivibrite”, “Schwim”, and a damping part made in the form of a disk of a soft vibration damping material located between disks of a solid vibration damping material, the soft vibration damping material is made, for example, from spongy rubber, nonwoven vibration damping material, polyurethane. Vibration damping disks are fixed along the entire length of the elastic core, located with alternating them with combined disks and are made in the form of a disk perforated frame made of elastic material filled with a mesh damping element. Density of the net structure of the net damping element of the disk perforated frame of the rigid damping disks filled with the mesh damping element is in the optimum range of values: 1.2÷2.0 g/cm³, wire material of elastic mesh elements is steel EI-708. Its diameter is in the optimal range of 0.09÷0.15 mm, while the mesh damping element is filled with an elastomer, for example polyurethane. Density of the net structure of the net damping element of the disk perforated frame of the rigid damping disks filled with the mesh damping element is in the optimum range of values: 1.2÷2.0 g/cm³. And the wire material of elastic mesh elements is EI-708 steel, and its diameter is in the optimal range of values of 0.09÷0.15 mm, while the mesh damping element is filled with an elastomer, for example polyurethane.

EFFECT: technical result consists in improved efficiency of noise suppression and seismic stability of the building.

1 cl, 11 dwg