CN215883973U - Sawtooth type vibration damping low-noise cabin wall plate - Google Patents

Abstract

The utility model provides a sawtooth-shaped vibration damping type low-noise bulkhead plate, which comprises a bulkhead plate, a sawtooth-shaped vibration damping mass loop and reinforcing ribs, wherein the sawtooth-shaped vibration damping mass loop is arranged on the bulkhead plate; the reinforcing ribs are welded on one surface of the bulkhead plate in a criss-cross mode, and the sawtooth type vibration damping mass loop is welded on the other surface of the bulkhead plate. The sawtooth type vibration-damping mass loop achieves the effect of double isolation of sound vibration, and the vibration-damping and noise-reducing effect reaches more than 6dB under the condition that the mass is increased by no more than 3%.

Description

Sawtooth type vibration damping low-noise cabin wall plate

Technical Field

The utility model relates to the field of ships and ocean platforms, in particular to a sawtooth type vibration damping low-noise bulkhead plate.

Background

In ship and ocean platform structures, bulkhead structures are the main way of transmitting structural vibration, when mechanical equipment operates, part of generated vibration is transmitted to a deck through a base to cause vibration of the deck structure, and the vibration of the deck structure is continuously transmitted to bulkheads; the other part is transmitted to the bulkhead through air noise to cause vibration noise, and the radiation noise is larger, so when the ship is controlled and the vibration noise of the ocean platform is reduced, the vibration noise of the bulkhead can be reduced through the optimized design of the bulkhead structure, and the aim of reducing the integral vibration noise of the platform is fulfilled.

A deck structure device with double rectangular vibration-proof mass loops is disclosed in a main cabin low-noise deck structure device (Liyuhui, etc., CN110466672A, 2019-11-19). The structure completely surrounds two bases supporting the same equipment, two groups of bases supporting the two equipment are configured with the same vibration-proof mass loops to form isolation of structural vibration waves generated by power machinery, the rectangular square steel loops not only isolate the transmission of structural noise, but also ensure that the deck cannot generate large deformation, so that the vibration-proof and noise-reduction effects reach more than 5dB, the weight of the vibration-proof mass loops does not exceed 5% of the total weight of the examined deck, and good vibration-proof and noise-reduction effects are achieved. The utility model prevents partial vibration wave generated by excitation of host equipment from transmitting on the deck, but partial vibration wave is transmitted to the bulkhead through air, so the utility model designs the bulkhead with low noise to enhance the vibration reduction and noise reduction effects; the double-loop vibration-damping mass loop weight does not exceed 5% of the total weight of the assessment deck, and the vibration-damping and noise-reducing effect reaches 5 dB.

"study of vibration damping effect of hollow square steel vibration damping mass structure" (shenhua et al, volume 54, phase 1, 2013, 4 months) discloses a study of vibration damping effect of hollow square steel vibration damping mass structure, and discloses: the hollow square steel vibration-damping mass has a more obvious vibration-damping effect than a solid square steel vibration-damping mass structure, and the additional mass is greatly reduced. This document has only proved that hollow square steel has good damping effect, has not carried out optimal design to specific damping mass loop shape so that reach optimal damping noise reduction effect under the little circumstances of bulkhead quality increase, and the zigzag type damping mass loop that this article designed can not only reach the effect of dual vibration isolation, can also increase the inside sound wave reflection number of times of bulkhead for consumption most when the vibration wave transmits the bulkhead, be unlikely to spread to cabin around, reach the damping noise reduction effect of whole ship.

Disclosure of Invention

The utility model aims to provide a sawtooth type vibration damping type low-noise cabin wall plate which can isolate, absorb and reflect vibration waves, isolate sound vibration and reduce cabin noise.

The purpose of the utility model is realized as follows:

a sawtooth type vibration damping low-noise bulkhead plate comprises a bulkhead plate 1, a sawtooth type vibration damping mass loop 2 and reinforcing ribs 3; the reinforcing ribs 3 are welded on one surface of the bulkhead plate 1 in a criss-cross mode, and the sawtooth type vibration damping mass loop 2 is welded on the other surface of the bulkhead plate 1.

The utility model also includes such structural features:

1. the seismic mass bars of the zigzag seismic mass loop 2 are arranged at the edge of the bulkhead plate 1.

2. And the vibration damping mass strip of the sawtooth-shaped vibration damping mass loop 2 is not higher than the height of the short side of the reinforcing rib 3.

3. The strengthening rib 3 is provided with long strengthening rib and short strengthening rib, and the crossing position of first row of long strengthening rib and short strengthening rib and last row all corresponds with the crossing position of damping mass strip.

Compared with the prior art, the utility model has the beneficial effects that:

the sawtooth type vibration-damping mass loop achieves the effect of double isolation of sound vibration, and the vibration-damping and noise-reducing effect reaches more than 6dB under the condition that the mass is increased by no more than 3%.

On one hand, after vibration waves are emitted from mechanical equipment such as a host and the like, a part of the vibration waves are reflected and absorbed when the vibration waves are transmitted to the bulkhead vibration damping mass bar through the deck; on the other hand, the vibration wave which penetrates through the vibration-damping mass strips is transmitted to the center of the bulkhead plate and then is diffused to the peripheral saw-tooth vibration-damping mass loop direction, and the saw-tooth vibration-damping mass loop consists of the vibration-damping mass strips at different angles, so that the vibration wave is continuously reflected and absorbed in all directions when passing through the vibration-damping mass strips at different angles, the vibration wave is completely consumed on the bulkhead, and only a small part of the vibration wave is transmitted to the peripheral cabin, so that the purpose of isolating the acoustic vibration is achieved.

Drawings

FIG. 1 is a cross-sectional view of a sawtooth-type damper mass loop structure;

FIG. 2 is a schematic view of a sawtooth-type damper mass loop structure;

fig. 3 is a schematic view of a low noise bulkhead configuration.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In fig. 1 and 2, in order to effectively block the transmission of vibration waves, the vibration damping mass bar is arranged at a position close to the bulkhead edge 8 and not beyond the first reinforcing rib 9 close to the bulkhead edge; the sawtooth type vibration-damping mass bars arranged along the long side and the short side in an array mode not only increase the length of vibration wave absorption, but also increase the reflection times of vibration waves inside the deck, and achieve good vibration-damping and noise-reducing effects; obtuse sawteeth 10 are additionally arranged at the edge of a bulkhead between two short reinforcing ribs, the other sawteeth 11 adjacent to the short reinforcing ribs along the long edge direction are arranged at the positions intersected with the long reinforcing ribs and the short reinforcing ribs, and the remaining sawteeth along the long edge are arrayed in the same arrangement mode; the number of the reinforcing ribs 7 distributed along the short side of the bulkhead is large, and the vibration wave is transmitted to the bulkhead through the long side and then transmitted to the short side, so that the number of the saw teeth 12 arranged along the short side can be properly reduced, but the span of the reinforcing ribs arranged along the long side is large, so that the purpose of absorbing and reflecting the vibration wave can be achieved by additionally arranging the saw teeth 13 at the center span of the two reinforcing ribs, and the rigidity of the bulkhead can be enhanced.

In fig. 3, the cabin wall structure including the saw-tooth type vibration damping low-noise bulkhead structure is composed of five parts, namely a bulkhead plate 1, a saw-tooth type vibration damping mass loop 2, a reinforcing rib 3, a deck plate 4, a main machine and an auxiliary machine and other mechanical equipment 5. The bulkhead plate is positioned between an upper deck and a lower deck, is welded around the deck plate on which mechanical equipment such as a host machine and the like are distributed, the reinforcing ribs are criss-cross and are uniformly welded on the surface of the bulkhead, and a zigzag loop formed by hollow rectangular-section vibration damping mass bars is welded on the other side of the bulkhead.

The functions of the utility model are mainly realized by the following structures:

1 bulkhead plate

A structure for supporting the upper deck, separating the cabin space and isolating noise. Is positioned between the upper deck and the lower deck and is welded around the deck plate distributed with mechanical equipment such as a host machine and the like.

2 sawtooth type vibration damping mass loop

The vibration transmission path is blocked or isolated, so that impedance mismatching is generated, and vibration waves are reflected and absorbed. The hollow rectangular cross section vibration-proof mass bar forms a zigzag loop and is welded on the edge of the cabin wall, so that the zigzag loop can obstruct and absorb vibration waves generated by mechanical equipment such as a host machine, an auxiliary machine and the like exciting a deck, and simultaneously plays roles of multiple reflection and absorption on the vibration waves transmitted to the cabin wall through the vibration-proof mass loop, thereby achieving the purposes of isolating sound vibration and reducing cabin noise.

3 reinforcing rib

And the structure can enhance the strength and rigidity of the bulkhead plate. The reinforcing ribs made of flat bulb steel are criss-cross and uniformly welded on the inner side of the bulkhead.

4 deck plate

A structure to support the bulkhead. Is made of common marine steel, various mechanical equipment is arranged above a deck, and the periphery of the deck is connected with a bulkhead.

Claims (4)

1. A sawtooth type vibration damping low-noise bulkhead plate is characterized in that: the vibration damping device comprises a bulkhead plate (1), a sawtooth type vibration damping mass loop (2) and reinforcing ribs (3); the reinforcing ribs (3) are welded on one surface of the bulkhead plate (1) in a criss-cross mode, and the sawtooth type vibration damping mass loop (2) is welded on the other surface of the bulkhead plate (1).

2. A saw-tooth type vibration damping low noise bulkhead plate according to claim 1, wherein: the vibration damping mass strips of the sawtooth-shaped vibration damping mass loop (2) are arranged at the edge of the bulkhead plate (1).

3. A saw-tooth type vibration damping low noise bulkhead plate according to claim 1 or 2, wherein: and the vibration damping mass strip of the sawtooth-shaped vibration damping mass loop (2) is not higher than the height of the short side of the reinforcing rib (3).

4. A saw-tooth type vibration damping low noise bulkhead plate according to claim 3, wherein: the strengthening rib (3) are provided with long strengthening rib and short strengthening rib, and the crossing position of first row of long strengthening rib and short strengthening rib and last row all corresponds with the crossing position of damping mass strip.

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