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68results about How to "Suppresses vibration transmission" patented technology

Photonic crystal vibration damping coupling

The invention provides a photonic crystal vibration damping coupling which comprises a first half coupling, a second half coupling, a Bragg type photonic crystal member and a local area resonance type photonic crystal member, wherein the Bragg type photonic crystal member is a cylinder composed of a first oscillator and a second oscillator; the material densities of the first oscillator and the second oscillator are different; the local area resonance type photonic crystal member comprises a base body rod, a nonmetal ring and a metal ring; the nonmetal ring wraps the base body rod; the metal ring wraps the nonmetal ring; circular holes and bolt holes are formed in flange plates of the first half coupling and the second half coupling; the local area resonance type photonic crystal member is mounted in the circular holes; the Bragg type photonic crystal member is mounted in shaft holes of the first half coupling and the second half coupling; and two ends of the Bragg type photonic crystal member are connected with a first rotating shaft and a second rotating shaft. The photonic crystal vibration damping coupling utilizes the characteristic that a photonic crystal can restrain vibration transmission and can effectively reduce torsional vibration and radial vibration of the coupling in low and medium frequency domains.
Owner:HARBIN ENG UNIV

A marine vibration damping paddle shaft

The invention discloses a marine vibration damping paddle shaft, belonging to the field of vibration damping and noise reduction. The damping paddle shaft includes a forward paddle shaft directly connected to the main engine or gearbox of the ship, a first damping mechanism, a middle paddle shaft, a second damping mechanism, and a terminal paddle shaft. Firstly, the traditional single propeller shaft is separated into three sections, the middle length of the shaft is the main part of the total length of the shaft, the forepart propeller shaft is directly connected with the main engine or gearbox of the ship, The terminal shaft is connected with the propeller or the steering conversion device, and the middle shaft is connected with the other two shafts through the vibration damping device,that is, the vibration source is isolated, the vibration is absorbed, the vibration of the main engine and the gear box of the ship and the vibration of the propeller are restrained and transmitted tothe middle section of the propeller shaft, and the shafting vibration and the hull vibration are reduced. Sixteen shock absorbers in the damping mechanism transmit shaft torque through springs, and absorb vibration through the joint action of springs and damping fluid, so as to suppress vibration transmission to the middle section of the shaft, which occupies the main part of the shaft length, thereby reducing the vibration response of the shaft system and the ship hull.
Owner:HARBIN ENG UNIV

Wide-band-gap efficient vibration isolation structure

ActiveCN111692261AEfficient vibration isolationThe effect of high-efficiency vibration isolationShock absorbersResonanceEngineering
The invention discloses a wide-band-gap efficient vibration isolation structure, and belongs to the technical field of vibration isolation devices. The wide-band-gap efficient vibration isolation structure comprises a periodic vibration isolation structure body, wherein the vibration isolation structure body comprises a plurality of vibration isolation sleeve pieces, and each vibration isolation sleeve piece comprises a plurality of vibration isolation components; each vibration isolation component comprises a base plate, an elastic base body and a resonance unit, wherein the elastic base bodyand the resonance unit are arranged on the base plate; in each vibration isolation sleeve piece, the base plates and the elastic base bodies of the vibration isolation components are alternately connected to form the vibration isolation sleeve piece; in each vibration isolation sleeve piece, the resonance frequencies of the resonance units of the vibration isolation components are not all equal;and in the vibration isolation structure body, the base plates and the elastic base bodies of the vibration isolation sleeve pieces are alternately connected to form the periodic vibration isolation structure body. The wide-band-gap efficient vibration isolation structure has the wide-band-gap efficient vibration isolation effect and has the inhibition effect on longitudinal vibration and bendingvibration.
Owner:LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT

Automobile rear side window area reinforcing structure and automobile

The invention relates to an automobile rear side window area reinforcing structure and an automobile. The automobile rear side window area reinforcing structure comprises a rear side wall inner plate, a rear wheel cover outer plate and a D pillar reinforcing part, wherein a rear side window is arranged at the upper part of the rear side wall inner plate, a C pillar inner plate is formed on the rear side wall inner plate and located on the front side of the rear side window, a reinforcing part assembly is overlapped on the surface, facing the exterior of the automobile, of the rear side wall inner plate, and a cavity reinforcing structure is formed in reinforcing part assembly on the rear side wall inner plate, the reinforcing part assembly comprises a first vertical extending section overlapped on the C pillar inner plate, a transverse extending section extending backwards from the lower end part of the first vertical extending section as well as a second vertical extending section extending downwards from the transverse extending section, the transverse extending section is arranged along the lower edge of the rear side window, the rear end part of the transverse extending section is overlapped on the D pillar reinforcing part, and the lower end part of the second vertical extending section is overlapped on an outer plate of the rear wheel cover outer plate. Excessive increasing of dead weight of the automobile is avoided while the rigidity of the rear side window area is improved and vibration transmission of back doors and vibration transmission of rear wheels are inhibited.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD

Multi-layer metal sponge structure high transmission loss vibration damping decking

The invention discloses a vibration reduction paving plate with multilayer metal spongy structure and high transfer loss. The vibration reduction paving plate with multilayer metal spongy structure and high transfer loss consists of three parts: an upper faceplate, a lower faceplate and a middle interlayer, wherein a plurality of rows of criss-cross reinforcing ribs are arranged at the inner surface of each of the upper faceplate and the lower faceplate; the faceplates form separated interval units through the transverse reinforcing ribs and the longitudinal reinforcing ribs. The middle interlayer unit comprises a plurality of layers of separated distribution middle layer units formed by foam metal layers and rubber layers; the corresponding interval units, separated by the reinforcing ribs, between the upper and lower layers of faceplates are filled with the middle interlayer units. The upper faceplate is not directly connected with the lower faceplate; the upper faceplate and the lower faceplate form a paving plate whole through being bonded by the middle interlayer units. The middle interlayer is separated into a plurality of interlayer units; gaps are formed between the interlayer units; the interlayer units are not connected. The designed paving plate has the characteristic of high structure damping; the structure vibration of the paving plate can be effectively reduced; the structure vibration transfer loss is increased; meanwhile, the structure weight of the paving plate can be reduced.
Owner:宁波勇毅科技有限公司

A Wide Bandgap Efficient Vibration Isolation Structure

ActiveCN111692261BEfficient vibration isolationThe effect of high-efficiency vibration isolationShock absorbersResonanceEngineering
The invention discloses a wide-band-gap efficient vibration isolation structure, and belongs to the technical field of vibration isolation devices. The wide-band-gap efficient vibration isolation structure comprises a periodic vibration isolation structure body, wherein the vibration isolation structure body comprises a plurality of vibration isolation sleeve pieces, and each vibration isolation sleeve piece comprises a plurality of vibration isolation components; each vibration isolation component comprises a base plate, an elastic base body and a resonance unit, wherein the elastic base bodyand the resonance unit are arranged on the base plate; in each vibration isolation sleeve piece, the base plates and the elastic base bodies of the vibration isolation components are alternately connected to form the vibration isolation sleeve piece; in each vibration isolation sleeve piece, the resonance frequencies of the resonance units of the vibration isolation components are not all equal;and in the vibration isolation structure body, the base plates and the elastic base bodies of the vibration isolation sleeve pieces are alternately connected to form the periodic vibration isolation structure body. The wide-band-gap efficient vibration isolation structure has the wide-band-gap efficient vibration isolation effect and has the inhibition effect on longitudinal vibration and bendingvibration.
Owner:LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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