CN109229278B - Ship vibration reduction structure and ship - Google Patents
Ship vibration reduction structure and ship Download PDFInfo
- Publication number
- CN109229278B CN109229278B CN201811131534.2A CN201811131534A CN109229278B CN 109229278 B CN109229278 B CN 109229278B CN 201811131534 A CN201811131534 A CN 201811131534A CN 109229278 B CN109229278 B CN 109229278B
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- ship
- cabin
- damping
- outer plate
- vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
- B63B17/0081—Vibration isolation or damping elements or arrangements, e.g. elastic support of deck-houses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to the technical field of ship manufacturing, and particularly discloses a ship vibration reduction structure and a ship. The ship vibration reduction structure comprises a cabin allowing seawater to enter from the upper side of the propeller, an outer plate is arranged at the bottom of the cabin, and a plurality of vibration reduction holes are formed in the outer plate. The area of the outer plate is reduced due to the arrangement of the vibration reduction holes, so that the excitation force acting on the outer plate is reduced, and further the excitation force transmitted to other areas of the ship by the outer plate is reduced, so that the vibration of the whole ship is reduced; the sea water can enter the cabin through the damping holes, the exciting force is transmitted to the sea water in the cabin through the outer plate and the damping holes, the sea water in the cabin plays a role in vibration absorption, and the exciting force transmitted to other areas of the ship is further reduced. The analysis shows that most of the exciting force generated by the propeller acts on the outer plate, and the exciting force acting on the outer plate is cut off and reduced, so that the exciting force transmitted to other areas of the ship is greatly reduced.
Description
Technical Field
The invention relates to the technical field of ship manufacturing, in particular to a ship vibration damping structure and a ship.
Background
In modern ships, due to the manufacturing progress of the marine main engine, the main engine vibration exciting force is smaller and smaller, and the propeller becomes the largest source of the ship vibration exciting force, so that the ship body vibration exceeds the standard, and the using comfort of the ship is influenced.
In the prior art, in order to reduce the exciting force generated by the propeller, a composite vibration damping structure is installed at the tail of the ship, the composite vibration damping structure comprises a bottom board, a platform, a rear bulkhead and a front bulkhead which are arranged above the propeller at the tail of the ship body, a plurality of vibration damping masses are arranged on the bottom board to block the transmission of vibration energy, the bottom board and the platform form a thin-plate resonance sound absorption device, the bottom board, the platform, the rear bulkhead and the front bulkhead form a closed cavity structure, a damping device and a steel ball are arranged in the closed cavity structure, and the vibration damping masses, the damping device and the steel ball form an impact vibration damping device together. Although the composite vibration damping structure in the prior art plays a role in vibration damping, the vibration damping mass, the damping device and the steel ball need to be additionally arranged on the ship, so that the vibration damping structure is complex.
Disclosure of Invention
An object of the present invention is to provide a ship vibration damping structure to simplify the structure and reduce the processing cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ship vibration reduction structure comprises a cabin allowing seawater to enter above a propeller, wherein an outer plate is arranged at the bottom of the cabin, and a plurality of vibration reduction holes are formed in the outer plate.
Preferably, the vibration damping holes are distributed in a rectangular area, and the rectangle is positioned right above the propeller.
Preferably, when the four sides of the rectangle are equal, the side length of the rectangle is larger than or equal to the diameter of the propeller; when the adjacent two sides of the rectangle are not equal, the length of the short side of the rectangle is larger than or equal to the diameter of the propeller.
Preferably, the area of the damping hole is less than or equal to 0.5m2。
Preferably, the damping hole is an elliptical hole.
Preferably, the major axis of the elliptical hole extends in the width direction of the ship.
Preferably, the distance between adjacent elliptical holes is greater than or equal to the major axis dimension of the elliptical holes.
Preferably, a partition is arranged in the chamber, the chamber comprises a first chamber and a second chamber, and the first chamber is communicated with the damping hole.
Preferably, the damping hole is a circular hole, a square hole and/or an elliptical hole.
Another object of the present invention is to provide a ship to simplify a ship damping structure and reduce a processing cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ship comprises the ship damping structure.
The invention has the beneficial effects that: the area of the outer plate is reduced due to the arrangement of the vibration reduction holes, so that the excitation force acting on the outer plate is reduced, and further the excitation force transmitted to other areas of the ship by the outer plate is reduced, so that the vibration of the whole ship is reduced; the sea water can enter the cabin through the damping holes, the exciting force is transmitted to the sea water in the cabin through the outer plate and the damping holes, the sea water in the cabin plays a role in vibration absorption, and the exciting force transmitted to other areas of the ship is further reduced.
The analysis shows that most of the exciting force generated by the propeller acts on the outer plate, and the exciting force acting on the outer plate is cut off and reduced, so that the exciting force transmitted to other areas of the ship is greatly reduced.
The ship has the advantages that the vibration reduction purpose can be achieved by directly arranging the vibration reduction holes on the outer plate of the cabin by utilizing the design principle of the cabin, the structure is simple, the processing cost is low, and the influence on the hydrodynamic performance of the propeller is small.
Drawings
Fig. 1 is a front view of a ship vibration damping structure provided by an embodiment of the present invention;
fig. 2 is a plan view of a ship damping structure according to an embodiment of the present invention.
In the figure:
1. a cabin; 11. an outer plate; 12. a damping hole; 2. a propeller; 3. a rudder of the ship.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
The embodiment provides a ship damping structure, which is used for damping ships, but is not limited to the ship damping structure, so that the ship damping structure is simplified, and the processing cost is reduced.
As shown in fig. 1 and 2, the ship damping structure provided by the present embodiment includes a chamber 1 above a propeller 2 for allowing seawater to enter, and a plurality of damping holes 12, wherein an outer plate 11 is disposed at the bottom of the chamber 1, and the plurality of damping holes 12 are opened in the outer plate 11.
The vibration damping holes 12 are arranged to reduce the area of the outer plate 11, so that the total sum of the excitation force acting on the outer plate 11 is reduced, and further the excitation force transmitted to other areas of the ship by the outer plate 11 is reduced, thereby reducing the vibration of the ship; seawater can enter the cabin 1 through the damping holes 12, the exciting force is transmitted into the seawater in the cabin 1 through the outer plate 11 and the damping holes 12, the seawater in the cabin 1 plays a role in vibration absorption, and the exciting force transmitted to other areas of the ship is further reduced.
It is found by simulation analysis that the excitation force generated by the propeller 2 acts on the outer panel 11 for the most part, and therefore, by cutting off and reducing the excitation force acting on the outer panel 11, the excitation force transmitted to other areas of the ship is greatly reduced.
Because the navigation of boats and ships can not be influenced even the sea water gets into in the design of original cabin 1 structure on boats and ships, this kind of design principle of cabin 1 is utilized to this embodiment, directly sets up damping hole 12 on the planking 11 in cabin 1 and can reach the purpose of damping, simple structure, and the processing cost is low, and is little to the hydrodynamic force performance influence of propeller 2.
In order to enable the cabin 1 to have an emergency function and partially keep the original cabin 1 in a state of not entering seawater, a partition plate is arranged in the cabin 1 and divides the cabin 1 into a first cabin and a second cabin, and the first cabin is communicated with the damping hole 12. The first cabin and the second cabin may be arranged in sequence along the length direction of the ship, or may be arranged in sequence along the vertical direction, as long as the damping hole 12 can be formed in the outer plate 11.
As a result of simulation analysis, the region in which the exciting force distributed on the outer plate 11 is mainly distributed is a region immediately above the propeller 2 and in the area of a square having a side length equal to the diameter of the propeller 2, in front of the rudder 3.
Therefore, in the present embodiment, in order to reduce the excitation force transmitted to the outer panel 11 as much as possible and to reduce the influence of the strength of the outer panel 11 as small as possible, the damper holes 12 are distributed in a rectangular area, and the rectangle is located directly above the propeller 2. The damping holes 12 are arranged in a rectangular area.
Since most of the excitation force generated by the propeller 2 is transmitted to other areas of the ship through the outer plate 11, in order to meet the ship body vibration standard and the use comfort of the ship, when the vibration damping holes 12 are distributed in a rectangular area with four equal sides, the side length of the rectangle is preferably greater than or equal to the diameter of the propeller 2, and when the vibration damping holes 12 are distributed in an adjacent rectangular area with two unequal sides, the length of the short side of the rectangle is greater than or equal to the diameter of the propeller 2.
The shape of the damping hole 12 may be one of a circular hole, a square hole and an elliptical hole, or a combination of two of them, or a hole including the above three forms at the same time. In the present embodiment, the damping hole 12 is preferably an elliptical hole, the major axis of which extends in the width direction of the ship. The outer plate 11 is a curved plate bent outward, and the vibration damping hole 12 is formed to facilitate the operation of a worker without stress concentration at the vibration damping hole 12.
In order to secure the strength of the outer panel 11, the area of the vibration-damping hole 12 is 0.5m or less2And the distance between the adjacent elliptical holes is larger than or equal to the size of the long axis of the elliptical hole.
The embodiment also provides a ship, which comprises the ship damping structure, and the vibration intensity of the ship meets the standard through the ship damping structure, so that the processing cost of the ship is not excessively increased.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. A ship damping structure comprises a cabin (1) allowing seawater to enter above a propeller (2), wherein the bottom of the cabin (1) is provided with an outer plate (11), and the ship damping structure is characterized in that a plurality of damping holes (12) are formed in the outer plate (11);
the vibration reduction holes (12) are distributed in a rectangular area, and the rectangle is positioned right above the propeller (2);
when the four sides of the rectangle are equal, the side length of the rectangle is larger than or equal to the diameter of the propeller (2); when the adjacent two sides of the rectangle are not equal, the length of the short side of the rectangle is larger than or equal to the diameter of the propeller (2);
the vibration reduction hole (12) is an elliptical hole; the major axis of the elliptical hole extends in the width direction of the vessel; be provided with the baffle in cabin (1), cabin (1) includes first cabin and second cabin, first cabin with damping hole (12) intercommunication.
2. Marine vessel damping arrangement according to claim 1, characterised in that the damping hole (12) has an area of less than or equal to 0.5m2。
3. The vibration damping structure for a ship according to claim 1, wherein a pitch between adjacent ones of the elliptical holes is greater than or equal to a major axis dimension of the elliptical holes.
4. Marine vessel damping arrangement according to claim 1, characterised in that the damping hole (12) is a round, square and/or elliptical hole.
5. A ship, characterized by comprising the ship vibration damping structure according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811131534.2A CN109229278B (en) | 2018-09-27 | 2018-09-27 | Ship vibration reduction structure and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811131534.2A CN109229278B (en) | 2018-09-27 | 2018-09-27 | Ship vibration reduction structure and ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109229278A CN109229278A (en) | 2019-01-18 |
| CN109229278B true CN109229278B (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811131534.2A Active CN109229278B (en) | 2018-09-27 | 2018-09-27 | Ship vibration reduction structure and ship |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113232820A (en) * | 2021-05-08 | 2021-08-10 | 舟山中远海运重工有限公司 | Vibration damper of marine main engine and manufacturing method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07475B2 (en) * | 1985-08-16 | 1995-01-11 | 石川島播磨重工業株式会社 | Stern-flow rectifying movable fin device |
| DE10135474B4 (en) * | 2001-07-20 | 2005-10-20 | Kvaerner Warnow Werft Gmbh | ship |
| JP4024793B2 (en) * | 2004-12-24 | 2007-12-19 | 株式会社新来島どっく | Pitching reduction device for ships |
| CN101190707B (en) * | 2006-12-01 | 2010-08-25 | 尹学军 | Boat hull surface buffering shock-absorbing device |
| KR20090072242A (en) * | 2007-12-28 | 2009-07-02 | 삼성중공업 주식회사 | Multi flow control appendages for reduction of exciting force induced by propeller |
| WO2013051915A1 (en) * | 2011-10-07 | 2013-04-11 | 삼성중공업 주식회사 | Excitation force reducing type ship |
| CN106458307B (en) * | 2014-05-02 | 2019-01-04 | 三星重工业株式会社 | For reducing the ship of exciting force caused by propeller cavitation |
| KR20160050293A (en) * | 2014-10-29 | 2016-05-11 | 에스티엑스조선해양 주식회사 | Device for absorbing fluctuation pressure |
| CN205273791U (en) * | 2015-11-27 | 2016-06-01 | 武汉理工大学 | Be applied to compound damping structure of full frequency domain of boats and ships afterbody |
| CN207257944U (en) * | 2017-08-18 | 2018-04-20 | 象山博生电子科技有限公司 | Propeller for vessels protective device |
| CN109018193B (en) * | 2018-07-16 | 2020-11-10 | 江苏科技大学 | Noise-reducing and vibration-reducing composite structural member for ship cabin |
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