CN202935548U - Hourglass type ocean engineering floating structure - Google Patents
Hourglass type ocean engineering floating structure Download PDFInfo
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- CN202935548U CN202935548U CN 201220526277 CN201220526277U CN202935548U CN 202935548 U CN202935548 U CN 202935548U CN 201220526277 CN201220526277 CN 201220526277 CN 201220526277 U CN201220526277 U CN 201220526277U CN 202935548 U CN202935548 U CN 202935548U
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Abstract
The utility model discloses an hourglass type ocean engineering floating structure which is provided with an upper structure and a lower structure. The upper structure is a circular truncated cone or a prism frustum. The lower structure is a regular circular truncated cone or a regular prism frustum. In the combination state, the bottom face with smaller size of the upper structure is fixedly connected with the bottom face with smaller size of the lower structure to form a connection face. Axes of the upper structure and the lower structure are located on the same straight line, the bottom with larger area of the upper structure is an upper deck of a floating structure, and the bottom with larger area of the lower structure is an underwater lower base plate of the floating structure. The connection face is a full load water plane of the floating structure. The floating structure has larger oil storage space compared with a traditional drilling platform and has good moving performance compared with a traditional floating production storage and offloading device (FPSO). Therefore, the hourglass type ocean engineering floating structure is favorable for achieving integration of large-scale drilling, exploiting, storing, producing, processing, transporting and the like of oil and gas in various sea areas, and has good economical benefits.
Description
Technical field
The utility model relates to Patent classificating number B63 boats and ships or other waterborne vessels; The equipment B 63B boats and ships relevant with ship or other waterborne vessels; Marine equipment B63B35/00 is suitable for the boats and ships of special purpose or similar floating structure B63B35/44 floating structure, and storehouse, cabin waterborne between overwater drilling platform or water vehicle, for example is loaded with oily water separating equipment.
Background technology
In the ocean engineering field, be no matter the economy from shallow water territory oil-gas mining, or consider from the essentiality of deep water and super deepwater field development of the field, all need to use the floating structure of corresponding scale.In addition, along with the trend that presents multifunctional all and develop to the deep-sea, floating structure not only needs to have enough volume of compartments and floor space carries exploitation and produces necessary oil gas and equipment, and need to have good exercise performance to bear the synergy of the abominable environmental loads such as stormy waves stream in deep-sea.Existing floating structure mainly comprises following several:
The semisubmersible floating structure is the mobile unit that most of buoyancy aid is submerged in a kind of many bodies small-waterplane-area in water, is comprised of platform body, column and lower body or buoyancy tank.Its advantage is, can the kept stable position after mooring and have less motion amplitude under the environmental load effect.But semisubmersible floating structure load-carrying capacity is limited and the volume of compartment space is less, and this has limited the storage of hydrocarbon mass and the installation of essential equipment.Even adopt the method for configuration oil tank, can take again a large amount of floor spaces and cause the unequal problem of load distribution.Therefore, traditional semisubmersible floating structure is difficult to realize hydrocarbon mass exploitation, storage, production, processing and outer defeated integrated.
SPAR single column floating structure major part is all floating drum.Main body is the single cylindrical structure, is suspended vertically in water, is particularly suitable for deepwater work.Such structure can be good in order to deepwater oil-gas development and motion stabilization, safety.Yet, its shortcoming be dark drinking water be subjected to ocean current affect large, haul is more difficult and housing apparatus and to store volume and the floor space of oil gas very little, these shortcomings have limited to some extent all that this type of structure multifunctional is integrated to be carried out.
Conventional ship type FPSO forms by old oil carrier transformation, or the barge type Floating Production oil storage unit of following the design of standard boats and ships theory and building.Technology is comparatively ripe at present, can in order to the exploitation of hydrocarbon mass, store and produce.But the hydrodynamic performance of this ship type buoyancy aid exists following limitation and deficiency: vertical the swinging of conventional ship type FPSO is difficult to away from the wave energy concentrated area natural period, and the heaving amplitude is larger.In addition, ship type FPSO is very responsive to the action direction of wave, and the area of laterally heading sea is excessive, so the rolling motion poor-performing.These all can have a strong impact on the normal operation of FPSO various device and instrument, the quality of producing crude oil and personnel's traveling comfort etc.Although the single buoy mooring system of configuration inner cupola and fluid coupling can make conventional ship type FPSO have 360 ° of comprehensive vane effects that rotate freely, but shaking motion, the comparatively violent head of ship type FPSO not only can have influence on normally carrying out of many operations, but also meeting severe wear inner cupola and fluid coupling make it need often maintenance and maintenance.Therefore, the price of inner cupola and fluid coupling self costliness, and the existence of potential shutdown period all can increase considerably productive costs.
Cylinder type FPSO main body is that mooring is in the floating cylindrical structure in seabed.This class formation has the ability of large scale storage and produce hydrocarbons, to the directivity of stormy waves stream insensitive and head to shake motion amplitude less.But its performance existent defect of while: buoyancy aid heaving amplitude is larger, easily causes vortex-induced vibration, and floor space is less, and inhabitation and working space are too near, are unfavorable for that the dangerous area is separated with non-hazardous area.
The utility model content
For above problem, the utility model proposes a kind of hourglass shape ocean engineering floating structure, have one and be upper structure and the bottom section body for positive round platform or positive terrace with edge of round platform or terrace with edge; Under assembled state, captiveing joint in the bottom surface that described topside bulk area less bottom surface and described bottom section bulk area are less, forms joint face; The axle of described upper structure and bottom section body is located along the same line, and it is the upper deck of floating structure that the topside object plane amasss the larger end, and it is that floating structure is in lower shoe under water that the bottom section object plane amasss the larger end; Described joint face is the load water plane of floating structure, and the main body of works is similar to hourglass shape, and take load water plane as hourglass by-level cross-sectional plane, section's structure has respectively the inclination angle of extending out up and down; The varying level cross-sectional plane of structure is close along the characteristic dimension of all directions, and described varying cross-section is circle or equilateral polygon.Vertical/rolling that the outside face of described bottom section thing is connected with the increase buoyancy aid and vertical annular side plate of swinging damping.
The inside of described upper structure has and its highly consistent central chamber I, is provided with a plurality of watertight compartments around this central chamber at the periphery of central chamber I, and described a plurality of watertight compartments are the inwall of captive joint topside body case and the outer wall of central chamber I respectively; The inside of bottom section body has and its highly consistent central chamber II, is provided with a plurality of watertight compartments around this central chamber in the surrounding of central chamber II, and described a plurality of watertight compartments are the inwall of captive joint bottom section body case and the outer wall of central chamber II respectively.
The described central chamber I that is connected and central chamber II form the moon pool that is connected with seawater.
A plurality of pillar stiffeners that are arranged at works main body outside, the two ends of pillar stiffener are captiveed joint with the bottom section body with described upper structure respectively.
The axle of described every pillar stiffener and works is positioned at same plane.
The length of described every pillar stiffener is consistent, and it is in the same plane that described many pillar stiffeners are positioned at the structure fixed end, and it is in the same plane that many calcaneus branches dagger is positioned at the fixed end of lower structure; Two adjacent pillar stiffeners consist of an isoceles triangle shape.
Described upper structure is: bus is that round platform or the incline that curve, broken line or curve are combined with broken line is the terrace with edge that curve, broken line or curve are combined with broken line.
Described bottom section body is: bus is that positive round platform or the incline that curve, broken line or curve are combined with broken line is the positive terrace with edge that curve, broken line or curve are combined with broken line.
Described joint face is the waterplane of floating structure.
Described floating structure is double hull configuration.
Owing to having adopted technique scheme, the ocean engineering floating structure that the utility model provides, realized by a kind of simple structure, compared with traditional drilling and producing platform and have larger oil storage space, compared with traditional oil storage boat form FPSO and have an exercise performance preferably.So the ocean engineering floating structure that the utility model proposes is conducive to realize drilling well, exploitation, storage, production, processing and the outer multifunctional all such as defeated of various marine sites hydrocarbon mass, has economic benefit preferably.
Description of drawings
Technical scheme for clearer explanation embodiment of the present utility model or prior art, the below will do one to the accompanying drawing of required use in embodiment or description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is hourglass shape ocean engineering floating structure schematic diagram
Fig. 2 is A-A circle or the horizontal schematic cross section of equilateral polygon, and wherein Fig. 2 A is the A-A schematic cross-section of the works of round platform; Fig. 2 B is the A-A schematic cross-section of positive six prism structure things
Fig. 3 A, Fig. 3 B, Fig. 3 C and Fig. 3 D are the main body side view of difform floating structure
Fig. 4 A and Fig. 4 B are that the hydrodynamic performance of all kinds FPSO compares schematic diagram
1. load water planes in figure, 2. upper structure, 3. bottom section body, 4. upper deck, 5. base plate, 6. circular level cross-sectionn, 7. equilateral polygon level cross-sectionn, 8. probing or the necessary equipment of production operation, 9. moon pool, 10. standpipe, 11. watertight compartments, 12. multi-buoy mooring systems, 13. pillar stiffeners, 14. annular side plate.
The specific embodiment
For the purpose, technical scheme and the advantage that make embodiment of the present utility model is clearer, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is known complete description:
As shown in Figure 1: a kind of ocean engineering floating structure, profile with the hourglass shape of being similar to, namely have the upper bottom surface and the lower shoe face that are parallel to each other, respectively as the upper deck 4 of works be positioned under water base plate 5, the diameter at the middle part of works main body will be significantly less than other parts of works, forms the structure of similar wasp waist or closing waist.
As a better embodiment, described ocean engineering floating structure is divided into two parts, and one is upper structure 2 and bottom section body 3 for positive round platform or positive terrace with edge of round platform or terrace with edge.Under assembled state, upper structure 2 is an inverted positive round platform or positive terrace with edge, and namely the upper base area is greater than the area of going to the bottom; In contrast, bottom section body 3 is a positive round platform of just putting or positive terrace with edge, and namely the upper base area is less than the area of going to the bottom.Upper structure 2 areas are less goes to the bottom and mutually docks with the less upper base of described bottom section body 3 areas, form one with deck and the joint face of going to the bottom and paralleling.When works was in water, this joint face was the load water plane 1 of works main body.Due to the waterplane with less, extend out the large tracts of land bottom surface of lateral plane and the relative waterplane of inclination, thereby can effectively control the natural heaving period of buoyancy aid away from wave spectrum high energy frequency band, and can increase floating structure vertical/rolling, heaving be at damping and the added mass of stormy waves frequency band.With respect to traditional floating structure, has splendid stability of motion.
In actual production process, be not necessarily limited to the described production and processing method that is divided into the up-down structure body, also can be according to actual conditions, one-body molded.
In order further to strengthen the stability of motion of floating structure in water, as a better embodiment, at the middle part of described bottom section thing 3 or the outside face of bottom, annular side plate 14 is installed, common this annular side plate 14 is for being horizontally disposed with, namely with other plane parallel of described works, also can make according to the sea situation in reality different sea areas the adjustment of pitching on angle.Annular side plate 14 structures have the vertical function of swinging plate and bilge keel on similar hull, can more effectively suppress buoyancy aid in the surge motion response of frequency band of low frequency.Combine with the works main body of hourglass shape structure make the utlity model has splendid anti-ly shake in length and breadth, heaving performance, stronger extreme marine environment adaptive capacity and very high operation validity and safety.
Further, preferred in order to increase the intensity of floating structure self, the utlity model has a plurality of pillar stiffeners 13 that are arranged at works main body outside, common, a plurality of pillar stiffeners 13 are symmetrical set.Captive joint with bottom section body 3 with described upper structure 2 respectively in the two ends of every pillar stiffener 13 and the axle of described every pillar stiffener 13 and works is positioned at same plane.Can play the load-carrying capacity that strengthens the deck and the effect that improves the buoyancy aid bending strength by actv..
Shape and the fixed form of described pillar stiffener are not limited in this, as another better embodiment, the length of described every pillar stiffener 13 is consistent, it is in the same plane that described many pillar stiffeners 13 are positioned at upper structure 2 fixed ends, and it is in the same plane that many calcaneus branches dagger 13 is positioned at the fixed end of bottom section body 3; Adjacent two pillar stiffeners 13 consist of an isoceles triangle shape.
Described ocean engineering floating structure is mainly reflected in the shape of shell, and section can arrange multiple functional cabin within it, to satisfy the different requirements of variety classes marine operation.As a better embodiment, as shown in Figure 2:
The inside of described upper structure has and its highly consistent central chamber I, is provided with a plurality of watertight compartments around this central chamber or other functional cabin at the periphery of central chamber I, and preferred, described a plurality of watertight compartments arrange axisymmetricly.The inwall of a plurality of watertight compartments 11 difference captive joint upper structure 2 shells and the outer wall of central chamber I; For the shell of works provides support.
Same, the inside of bottom section body 3 has and its highly consistent central chamber II, surrounding at central chamber II is provided with a plurality of watertight compartments 11 around this central chamber, described a plurality of watertight compartment is the inwall of captive joint bottom section body 3 shells and the outer wall of central chamber II respectively, for the shell of bottom section body 3 provides support.
Further, for other production operation equipment such as drill bit or standpipe can be installed, preferred, described central chamber I and central chamber II in the vertical direction are connected, and form the moon pool 9 that runs through the total thing, with the convenient relevant device of installing.Simultaneously, because described moon pool 9 is connected with seawater, also can further strengthen the stability of works in water.
The form of described upper structure 2 is not limited in and is terrace with edge or round platform, and other the structure that is similar to terrace with edge or round platform all can.Can be that bus is that the round platform of curve, broken line or the curve composite line type of being combined with broken line or incline are the terrace with edge of curve, broken line or the curve composite line type of being combined with broken line, also can reach similar effect.As shown in Figure 3.
Same, similar with upper structure 2, positive round platform or incline that the bus of bottom section body 3 can be combined with broken line for curve, broken line or curve are the positive terrace with edge that curve, broken line or curve are combined with broken line.Through evidence, so long as with positive round platform or the positive similar structure of terrace with edge, all have advantage described in the utility model.
In addition, the utility model also has the following performance advantage:
Lower apron of the present utility model adopts with the lateral layout that necessarily extends out the inclination angle.On the basis with enough oil reserves, good seakeeping performance, to compare with SPAR and dark drinking water semisubmersible, the drinking water of this Novel floating body is relatively shallow, for ease of maintenaince, migration and towage, and can be used for shallow water operations, and the comformability in application marine site is stronger.
The utlity model has the waterplane of less, in length and breadth to the equal less of characteristic length, thereby can reduce wave action structurally in length and breadth to hogging or in the flexural load that hangs down.In addition, have the hourglass shape structure of " big in the end and small in the middle " due to utility model, buoyancy aid all has higher modulus of midship section in any direction, therefore can further increase structural strength, makes structural bending and fatigue stress be in a lower level.
Lower apron of the present utility model adopts with the lateral layout that necessarily extends out the inclination angle.Compare with the cylinder of identical waterplane area and displacement of volume, it is long-pending that this Novel floating body has less fluoran stream surface under water.In addition, extend out the generation that inclined side is conducive to suppress vortex-induced vibration.Therefore, under identical ocean current environment, this Novel floating body can be subject to the current load effect of less.
The Central Symmetry profile that buoyancy aid profile of the present utility model is hourglass shape, can be easily set up central chamber or moon pool in the buoyancy aid center, be used for laying the line, directly lead to all tanks, and no longer need any pipeline in oil, water tank, greatly simplify engineering design, construction and operation, can save the various raws MAT'L such as pipeline and cable.On the other hand, because the similarity degree of each modular construction of Novel floating body is high, be fit to adopt the modularization build process, the difficulty that has therefore reduced design and built.In addition, according to symmetry principle, can with buoyancy aid segmentation symmetrically, reduce main body to the requirement of construction dock, thereby can provide larger selection space to the owner.
The utility model adopts with the lateral layout that necessarily extends out the inclination angle, the volume static moment of water outlet and entry wedge shape in the time of can increasing the buoyancy aid inclination.Therefore satisfy under the condition of initial stability in assurance, along with the increase at angle of inclination, this side view can make the buoyancy aid righting moment increase sharply, and with larger limit restoring moment and angle of vanishing stability.In addition, the inclined side design coordinates the annular side plate structure can greatly increase damping and the added mass that buoyancy aid shakes in length and breadth, thereby can increase natural period, reduces motion amplitude.So when running into stormy waves at sea, the Novel floating body structure namely can not produce violent waving, and can provide enough large angle stability again, has the stability feature of suitable abyssal environment.On the other hand, reduction along with drinking water, waterplane size and the moment of inertia of underwater buoyant body constantly increase, can make up well because displacement and height of center of buoyancy reduce the stability loss that brings, different load-carrying situations are fully loaded so this Novel floating body can promote effectively, the stability of ballast etc., avoid occuring cylinder type FPSO or SPAR platform and hang down and swing the unstable phenomenon that resonance motion brings.
Described floating structure is double hull configuration.The utility model adopts double bottom, two side structure.This structure can be strengthened the mixing rigidity of main deck and the center shaft of Novel floating body, is conducive to the longitudinal strength of structure.In addition, can be used as ballast chamber in the inner space of double bottom, two topsides, when playing the ballast effect, can prevent that also buoyancy aid from damaged oil spilling phenomenon occuring, and guarantees safety and the feature of environmental protection of production operation.
The utility model adopts the configuration design of single gyro-rotor.Under the prerequisite with good stability and seakeeping performance, overcome the drinking water that causes due to the binary profile load carrying ability has been changed the shortcoming very responsive, that face area is excessive, structure is heavier.Make the main quality of Novel floating body relatively low, improved the capacity weight rate, and reduced the consumption of steel, reduced the cost of structure.
Above water of the present utility model adopts with the lateral layout that necessarily extends out the inclination angle.Have under good longitudinal and transverse prerequisite of shaking with the heaving performance, this configuration design with certain flare can reduce the wave climb altitude of Novel floating body, can suitably reduce the shipping of green water phenomenon.In addition, compare with the cylinder of identical waterplane area and volume, the inverted round stage buoyancy aid has less wind area and lower stress action spot.Therefore, under identical sea wind environmental conditions, the suffered wind load of Novel floating body and wind heeling moment are less.
The utility model adopts with the lateral layout that necessarily extends out the inclination angle.Therefore, when sea ice acts on the buoyancy aid side of inclination, will be become by traditional squeeze and destroy the weak bending failure of relative intensity, thereby can greatly reduce to act on the ice load on works, therefore this Novel floating body has comparatively good anti-ice performance, goes for the marine site that freezes.
here, for the good exercise performance advantage of hourglass ocean engineering floating structure described in the utility model is described more intuitively, with dock round table-like hourglass FPSO(be described on, lower structure is round platform) be example, with function (load carrying ability, buoyancy aid volume and upper deck area) identical traditional rectangle barge FPSO, the hydrodynamic performance of cylindric cylinder type FPSO compares analysis, the high frequency motion performance of the various FPSO that the general potential barrier boundary element theory that now will adopt present process to verify calculates is (vertical, rolling and vertical swinging) show as Fig. 4 A and Fig. 4 B, wherein mainly pay close attention to the larger stormy waves frequency band of energy 0.209 ~ 6.28 (1 ~ 30s).
As can be seen from the figure, FPSO compares with the barge type, and when laterally heading sea, vertical the swinging with the rolling motion performance of novel FPSO has larger lifting, and barge type FPSO vertical swings and pitching performance close being more or less the same substantially when vertically heading sea.In addition, longitudinal and transverse the shaking with the heaving performance of novel FPSO all greatly is better than cylindric cylinder FPSO.Therefore, this shows that innovation configuration design of the present utility model can increase substantially the hydrodynamic performance of FPSO.
In Fig. 4 A and Fig. 4 B, cub represents that (head sea represents the situation of vertically heading sea to rectangle barge FPSO model, beam sea represents the situation of laterally heading sea), cylinder represents cylindric cylinder FPSO model, and sandglass FPSO represents sandglass FPSO representative docking circular table ocean engineering floating structure.In addition, 6 degree of freedom motions are respectively: surging surge, and swaying sway hangs down and swings heave, pitching pitch, rolling sway and head shake yaw.
The above; it is only the better specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or changed according to the technical solution of the utility model and utility model design thereof, within all should being encompassed in protection domain of the present utility model.
Claims (9)
1. a hourglass shape ocean engineering floating structure, have one and be upper structure and the bottom section body for positive round platform or positive terrace with edge of round platform or terrace with edge; Under assembled state, captiveing joint in the bottom surface that described topside bulk area less bottom surface and described bottom section bulk area are less, forms joint face; The axle of described upper structure and bottom section body is located along the same line, and it is the upper deck of floating structure that the topside object plane amasss the larger end, and it is that floating structure is in lower shoe under water that the bottom section object plane amasss the larger end; Described joint face is the load water plane of floating structure, and the main body of works is similar to hourglass shape, and take load water plane as hourglass by-level cross-sectional plane, section's structure has respectively the inclination angle of extending out up and down; The varying level cross-sectional plane of structure is close along the characteristic dimension of all directions, and described varying cross-section is circle or equilateral polygon.
2. hourglass shape ocean engineering floating structure according to claim 1, be further characterized in that: vertical/rolling that the outside face of described bottom section thing is connected with the increase buoyancy aid and vertical annular side plate of swinging damping.
3. hourglass shape ocean engineering floating structure according to claim 1, be further characterized in that: the inside of described upper structure has and its highly consistent central chamber I, periphery at central chamber I is provided with a plurality of watertight compartments around this central chamber, the inwall of described a plurality of watertight compartments difference captive joint topside body case and the outer wall of central chamber I;
The inside of bottom section body has and its highly consistent central chamber II, is provided with a plurality of watertight compartments around this central chamber in the surrounding of central chamber II, and described a plurality of watertight compartments are the inwall of captive joint bottom section body case and the outer wall of central chamber II respectively.
4. hourglass shape ocean engineering floating structure according to claim 3, be further characterized in that: the moon pool that the described central chamber I that is connected and central chamber II formation are connected with seawater.
5. hourglass shape ocean engineering floating structure according to claim 1, be further characterized in that: have: a plurality of pillar stiffeners that are arranged at works main body outside, the two ends of pillar stiffener are captiveed joint with the bottom section body with described upper structure respectively; The axle of described every pillar stiffener and works is positioned at same plane.
6. hourglass shape ocean engineering floating structure according to claim 5, be further characterized in that: the length of described every pillar stiffener is consistent, it is in the same plane that described many pillar stiffeners are positioned at the structure fixed end, and it is in the same plane that many calcaneus branches dagger is positioned at the fixed end of lower structure; Two adjacent pillar stiffeners consist of an isoceles triangle shape.
7. hourglass shape ocean engineering floating structure according to claim 1, be further characterized in that: described upper structure is: bus is that round platform or the incline that curve, broken line or curve are combined with broken line is the terrace with edge that curve, broken line or curve are combined with broken line.
8. hourglass shape ocean engineering floating structure according to claim 1, be further characterized in that: described bottom section body is: bus is that positive round platform or the incline that curve, broken line or curve are combined with broken line is the positive terrace with edge that curve, broken line or curve are combined with broken line.
9. according to the described hourglass shape ocean engineering of above any one claim floating structure, be further characterized in that: described floating structure is double hull configuration.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526277 CN202935548U (en) | 2012-10-15 | 2012-10-15 | Hourglass type ocean engineering floating structure |
| US14/416,511 US9802683B2 (en) | 2012-10-15 | 2013-05-03 | Sandglass type ocean engineering floating structure |
| PCT/CN2013/075132 WO2014059783A1 (en) | 2012-10-15 | 2013-05-03 | Sandglass type ocean engineering floating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526277 CN202935548U (en) | 2012-10-15 | 2012-10-15 | Hourglass type ocean engineering floating structure |
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| CN202935548U true CN202935548U (en) | 2013-05-15 |
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| CN 201220526277 Expired - Lifetime CN202935548U (en) | 2012-10-15 | 2012-10-15 | Hourglass type ocean engineering floating structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085947A (en) * | 2012-10-15 | 2013-05-08 | 大连理工大学 | Hourglass type ocean engineering floating structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103085947A (en) * | 2012-10-15 | 2013-05-08 | 大连理工大学 | Hourglass type ocean engineering floating structure |
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