CN202783702U - Ship with wing bridges capable of reducing vibration through counterweights - Google Patents
Ship with wing bridges capable of reducing vibration through counterweights Download PDFInfo
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- CN202783702U CN202783702U CN 201220471762 CN201220471762U CN202783702U CN 202783702 U CN202783702 U CN 202783702U CN 201220471762 CN201220471762 CN 201220471762 CN 201220471762 U CN201220471762 U CN 201220471762U CN 202783702 U CN202783702 U CN 202783702U
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- wing bridge
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- ship
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Abstract
The utility model discloses a ship with wing bridges capable of reducing vibration through counterweights. The ship comprises a living accommodation which is arranged on a deck at the tail of a ship body, and a larboard wing bridge and a starboard wing bridge which are symmetrically arranged along the longitudinal direction of the ship, wherein an equal-weight counterweight is arranged at the bottom of each of the larboard wing bridge and the starboard wing bridge. The ship with the wing bridges capable of reducing the vibration through the counterweights is low the production cost and simple in construction, the end vibration response of the port wing bridge and the starboard wing bridge can be greatly reduced, and the using safety of the wing bridges is improved.
Description
Technical field
The utility model relates to a kind of boats and ships, but particularly relates to a kind of boats and ships of wing bridge counterweight vibration damping.
Background technology
For the ease of the boats and ships landing pier or to the high lookout of standing of the periphery situation of pulling in to shore, also for pirate's situation of observation boat topside when the navigation, all can wing bridge be set at boats and ships simultaneously.Particularly when large ship rode the sea, because stormy waves is large, hull itself rocked very violently, and the crewman checks that by the upper wing bridge of standing the peripheral situation of pulling in to shore seems particularly necessary.This boats and ships with wing bridge probably occur because main frame is identical with the natural frequency of wing bridge with the propeller-excited vibration frequency, thereby the problem that resonance causes wing bridge acutely to rock occurs.Simultaneously, the crewman also slips and falls into the water because of rocking of wing bridge easily.
The at present processing of reply wing bridge resonance problem all is self natural frequency of taking to increase wing bridge usually, thereby avoids the way of main frame and propeller-excited vibration frequency.But because wing bridge is the version that overhangs, its natural frequency is lower.If adopt the rigidity of structure that increases wing bridge, namely change steel structure, its natural frequency is significantly improved, thereby avoid the scheme of exciting frequency, implementation gets up then, and not only trouble and cost are very high.And higher at main frame cylinder number or the screw propeller number of sheets, wing bridge overhangs in the larger situation of length, and this scheme is unfeasible.
The utility model content
The technical problems to be solved in the utility model be for the boats and ships wing bridge that overcomes prior art easily and main frame and screw propeller resonate, the defective that has potential safety hazard during use, provide a kind of cost of manufacture low, but construction is simple and can significantly reduce the boats and ships of the wing bridge counterweight vibration damping of wing bridge end portion vibration response.
The utility model solves above-mentioned technical matters by following technical proposals: but a kind of boats and ships of wing bridge counterweight vibration damping, it comprises: one is located at the accommodation on the hull afterbody deck, along the vertical symmetrically arranged larboard wing bridge of described boats and ships and a starboard wing bridge, its characteristics are that the bottom of described larboard wing bridge and described starboard wing bridge is respectively equipped with the clump weight of an equal weight.This programme can make the natural frequency of larboard wing bridge and starboard wing bridge reduce, and itself and main frame resonance speed are dropped to below the normal revolution scope by behind the clump weight of the additional equivalent weight in the end of larboard wing bridge and starboard wing bridge.
Preferably, the bottom of described larboard wing bridge and described starboard wing bridge is arranged with respectively a diagonal brace section, and the bottom of two described diagonal brace sections is all affixed with described deck.
This programme can support larboard wing bridge, starboard wing bridge securely by symmetrically arranged two diagonal brace sections, the stability when improving ship's navigation.
Preferably, the top of two described diagonal brace sections is arranged with respectively a casing.
Preferably, two described clump weights lay respectively in the casing of respective side.
This programme is contained in clump weight in the casing, can not be scattered on the one hand, also is convenient on the other hand install, and improves the efficient of boats and ships construction.
Preferably, the main frame of described boats and ships is 7 cylinder machines, and the screw propeller of described boats and ships is one 4 vane propellers.
Preferably, the weight of described clump weight is 5 tons or 7 tons.Preferably, the described clump weight one assembly pouring weight that can be formed by plurality of steel plates or iron plate.
In the utility model, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge namely gets each preferred embodiment of the utility model.
Positive progressive effect of the present utility model is:
1, adopts the utility model, after increasing clump weight in the wing bridge end, the natural frequency of wing bridge is reduced, and itself and main frame resonance speed are dropped to below the normal revolution scope.The utility model not only boats and ships wing bridge resonance speed time response reduces, and the vibratory response under other each rotating speeds all can wholely descend, so the utility model has improved safety and fastness when boats and ships use.
2, in addition, the utility model cost of manufacture is low, and construction is simple, and feasibility is strong, and main frame cylinder number or the screw propeller number of sheets are very high solving, and wing bridge when overhanging the larger large ship wing bridge vibration problem of length effect very obvious.
Description of drawings
Fig. 1 is the boats and ships local structural graph of two side of a ship wing bridges of the utility model one preferred embodiment.
The specific embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
As shown in Figure 1, boats and ships of the present utility model are provided with an accommodation 2, and accommodation 2 is provided in a side of on the hull afterbody deck (not indicating among the figure).The bilateral symmetry of accommodation 2 is provided with a larboard wing bridge 1 and a starboard wing bridge 3, and wherein, larboard wing bridge 1 comprises a larboard fore-and-aft gangway 11, and starboard wing bridge 3 comprises a starboard fore-and-aft gangway 31.Be called for short again two side of a ship wing bridges in order to reduce larboard wing bridge 1 and starboard wing bridge 3(larboard wing bridge and starboard wing bridge this paper) natural frequency, make itself and marine main engine resonance speed, drop to and do not produce resonance below the normal revolution scope, especially, be equiped with the clump weight 4 of an equivalent weight along longitudinal center's symmetry of accommodation 2 in the bottom of larboard fore-and-aft gangway 11, starboard fore-and-aft gangway 31.
In addition, the bottom that is arranged with respectively 5, two diagonal brace sections 5 of a diagonal brace section, the bottom of larboard fore-and-aft gangway 11, starboard fore-and-aft gangway 31 all is fixed on the deck of the accommodation space for vessels 2.Two diagonal brace sections 5 by symmetry is obliquely installed can support larboard wing bridge 1, starboard wing bridge 3 securely, improve the safety of larboard wing bridge, starboard wing bridge.
Place, top in two diagonal brace sections 5 is provided with a casing (not indicating among the figure) symmetrically along the longitudinal center of accommodation 2 respectively.Two clump weights 4 are contained in respectively in the casing of respective side.Clump weight 4 is contained in the casing, can be scattered on the one hand, also be convenient on the other hand install, improve the efficient of boats and ships construction.
Clump weight can be comprised of plurality of steel plates or iron plate.Find that by test when the weight of clump weight is that falling of the 5 ton hours effect of shaking is better, it is best that the effect of shaking falls in 7 ton hours.
Above-mentioned test procedure comprises:
1), larboard wing bridge, starboard wing bridge (hereinafter " larboard wing bridge, starboard wing bridge " being called for short: " two side of a ship wing bridge ") are carried out Finite element analysis on vibration, thus primitive decision resonance frequency and main frame resonance speed.
2), according to the results, consider the information such as accommodation structural arrangement, main frame normal revolution, tentatively determine layout points and the weight size of clump weight.
3), by Finite element analysis on vibration, repeatedly calculate, optimize the weight size of clump weight.
4), to the real ship of landing pier in two kinds of situations of not allocating clump weight and allotment weight block, carry out two side of a ship wing bridge impact tests, and measure its natural frequency.
5), measured data is analyzed, consider the results, finally determine the weight size, and fix clump weight at two side of a ship wing bridges.
6), in when trial voyage or flight, two side of a ship wing bridges are carried out Measurement of Vibration.
The below illustrates test effect of the present utility model take the test of a mammoth tanker as example.The main frame of this type oil tanker is 7 cylinder machines, and the rotating speed of the normal continuous output of main frame when (being called for short NCR) is 73.4rpm, and the rotating speed of the maximum continuous output of main frame when (being called for short MCR) is 76rpm, and screw propeller is one 4 vane propellers.For full ship level of vibration there being one comprehensively understand, at first to the carrying out of full ship a vibration-mode analysis and each disturbance force force the lower frequency domain response analysis of effect.
Analyze finding, is 68.5rpm(rpm at the rotating speed of this mammoth tanker main frame, and namely revolutions per minute refers to that how many per minutes turns, and is mainly used in characterizing the rotating speed of mechanical rotor) time boats and ships near the longitudinal vibration amplitude in two side of a ship wing bridges end higher.Reason is that main frame 7 cylinder H type horizontally-guided moment exciting frequencys that accommodation mainly reverses natural frequency corresponding to the vibration shape and boats and ships resonance occurs cause.For the level of vibration of 60rpm ~ 76rpm scope rotating speed, need to be reduced to the natural frequency of larboard wing bridge, starboard wing bridge below the 7Hz, resonance speed is reduced to below the 60rpm.
Clump weight by additional 1 ton, 3 tons, 5 tons, 7 tons in two side of a ship wing bridges end carries out respectively the analysis of a full ship model attitude.Analysis result shows that increase can be reduced to natural frequency corresponding to the accommodation maximum twist vibration shape below the 7Hz more than 5 tons, and namely resonance speed is reduced to below the 60rpm.
The accuracy of analyzing for proof theory is carried out an impact test according to the result of theoretical analysis to two side of a ship wing bridges and is measured its natural frequency.Test result shows: the calculated results is more accurate, and after respectively increasing by 5 tons clump weight on larboard wing bridge, the starboard wing bridge, the natural frequency of larboard wing bridge, starboard wing bridge can be reduced to below the 7Hz.
In addition, analyze and the result of two side of a ship wing bridge impact tests according to full ship model attitude, also to two side of a ship wing bridges casing in respectively install 7 tons clump weight, in trial voyage or flight, carry out vibratory response and measure.Particularly, respectively at ballast operating mode and full-loading condition, additional bob-weight piece and additional bob-weight piece are not measured two side of a ship wing bridge end portion vibration responses under totally four kinds of operating modes.Test result shows: under ballast operating mode and full-loading condition, after in the casing at the larboard of two side of a ship wing bridge respective side or starboard place, respectively increasing by 7 tons clump weight, the resonance speed of wing bridge is reduced to 57rpm by 66rpm, the vibratory response of two side of a ship wing bridges end of the lower boats and ships of each rotating speed (comprising resonance speed), especially the longitudinal vibration response declines to a great extent.
The trial voyage or flight measured result proves, the utility model is by in the end of two side of a ship wing bridges allotment weight, thus solve main frame cylinder number or the screw propeller number of sheets higher, the wing bridge vibration problem of long large and medium-sized boats and ships wing bridge of length that overhangs, and effectiveness in vibration suppression is fairly obvious.
Although more than described the specific embodiment of the present utility model, it will be understood by those of skill in the art that these only are casehistorys, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make various changes or modifications to these embodiments under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection domain of the present utility model.
Claims (6)
1. but the boats and ships of a wing bridge counterweight vibration damping, it comprises: one is located at the accommodation on the hull afterbody deck, and along the vertical symmetrically arranged larboard wing bridge of described boats and ships and a starboard wing bridge, it is characterized in that the bottom of described larboard wing bridge and described starboard wing bridge is respectively equipped with the clump weight of an equal weight.
2. boats and ships as claimed in claim 1 is characterized in that, the bottom of described larboard wing bridge and described starboard wing bridge is arranged with respectively a diagonal brace section, and the bottom of two described diagonal brace sections is all affixed with described deck.
3. boats and ships as claimed in claim 2 is characterized in that, the top of two described diagonal brace sections is arranged with respectively a casing.
4. boats and ships as claimed in claim 3 is characterized in that, two described clump weights lay respectively in the described casing of respective side.
5. boats and ships as claimed in claim 1 is characterized in that, the main frame of described boats and ships is 7 cylinder machines, and the screw propeller of described boats and ships is one 4 vane propellers.
6. such as the described boats and ships of any one in the claim 1 to 5, it is characterized in that the weight of described clump weight is 5 tons or 7 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471762 CN202783702U (en) | 2012-09-14 | 2012-09-14 | Ship with wing bridges capable of reducing vibration through counterweights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471762 CN202783702U (en) | 2012-09-14 | 2012-09-14 | Ship with wing bridges capable of reducing vibration through counterweights |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202783702U true CN202783702U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220471762 Expired - Fee Related CN202783702U (en) | 2012-09-14 | 2012-09-14 | Ship with wing bridges capable of reducing vibration through counterweights |
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|---|---|
| CN (1) | CN202783702U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019019506A1 (en) * | 2017-07-26 | 2019-01-31 | 广船国际有限公司 | Ship bridge wing structure |
| CN111361689A (en) * | 2020-03-13 | 2020-07-03 | 上海外高桥造船有限公司 | Ship with a detachable cover |
| CN113232766A (en) * | 2021-05-08 | 2021-08-10 | 舟山中远海运重工有限公司 | Damping device of shuttle tanker comfort level upper building structure and manufacturing method |
| CN113581365A (en) * | 2021-08-11 | 2021-11-02 | 上海外高桥造船有限公司 | Wing bridge of hull superstructure and ship |
-
2012
- 2012-09-14 CN CN 201220471762 patent/CN202783702U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019019506A1 (en) * | 2017-07-26 | 2019-01-31 | 广船国际有限公司 | Ship bridge wing structure |
| CN111361689A (en) * | 2020-03-13 | 2020-07-03 | 上海外高桥造船有限公司 | Ship with a detachable cover |
| CN113232766A (en) * | 2021-05-08 | 2021-08-10 | 舟山中远海运重工有限公司 | Damping device of shuttle tanker comfort level upper building structure and manufacturing method |
| CN113581365A (en) * | 2021-08-11 | 2021-11-02 | 上海外高桥造船有限公司 | Wing bridge of hull superstructure and ship |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20210914 |