CN104743075A - Device for reducing initial air gap of semi-submersible platform - Google Patents
Device for reducing initial air gap of semi-submersible platform Download PDFInfo
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- CN104743075A CN104743075A CN201510161168.5A CN201510161168A CN104743075A CN 104743075 A CN104743075 A CN 104743075A CN 201510161168 A CN201510161168 A CN 201510161168A CN 104743075 A CN104743075 A CN 104743075A
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Abstract
The invention discloses a device for reducing an initial air gap of a semi-submersible platform. The device for reducing the initial air gap of the semi-submersible platform comprises a stream guidance drum, and multiple layers of annular wave attenuating plates that are distributed at intervals layer by layer along an axial direction of an upright column of the semi-submersible platform. The annular wave attenuating plates are fixed between the upright column and the stream guidance drum, outer diameters of the multiple layers of annular wave attenuating plates reduce gradually from the upper end to the lower end of the upright column. The annular wave attenuating plates and the stream guidance drum are respectively provided with a plurality of round holes. The upper end of the stream guidance drum extends outside an arc-shaped outward flange that is fixedly connected with a lower deck of an upper body of the semi-submersible platform; and the lower end of the stream guidance drum is fixed on an upper lateral side of a lower floating body of the semi-submersible platform. The device for reducing the initial air gap of the semi-submersible platform is simple in structure. The stream guidance drum and the multiple layers of annular wave attenuating plates or multiple layers of annular wave attenuating bodies or multiple rows of arc-shaped wave attenuating plates can effectively prevent waves climbing along the upright column, accordingly preventing the occurrence of overtopping, thereby reducing the initial air gap of the semi-submersible platform. The waves are guided to be attenuated grade by grade until the waves crush automatically due to the ultrahigh climbing angle, accordingly inhibiting the waves climbing along the upright column of the semi-submersible platform, and preventing the occurrence of the overtopping.
Description
Technical field
The present invention relates to a kind of safety device of semi-submerged platform, particularly a kind ofly reduce the device that wave directly impacts semi-submerged platform column, belong to field of ocean engineering.
background technology:
To the vertical distance between corrugated bottom the lower tween deck that air gap refers to semi-submerged platform, the initial air gap of platform is defined as the vertical distance of lower tween deck to still water level.
Along with continually developing of deepwater field, increasing to the demand of all kinds platform.The advantages such as semi-submerged platform is wide with its operating depth scope, floor space is large and delelivered payload capability is strong, are widely used in offshore oil drilling and exploitation.But, due under semi-submerged platform between buoyancy aid and deck by some upright supports, the impingement phenomenon of wave climbing and strong nonlinearity easily occurs, shows as wave and upwards climb along semi-submerged platform column, it is affect the key factor that air gap changes.Under severe sea condition, this wave climbing phenomenon can make wave rise to semi-submerged platform lower deck even to occur more unrestrained, the generation that wave clashes into semi-submerged platform lower deck and the strong nonlinearity phenomenon such as more unrestrained all will bring adverse effect to production facilities and personnel, constitute a threat to the safety of semi-submerged platform.Traditional designing axiom makes lower tween deck have enough height to ensure wave out of reach deck, namely the initial air gap of semi-submerged platform is increased, but the cost increasing the initial air gap of semi-submerged platform increases a lot, and the height on deck is also subject to the restriction of sole mass and stability factor, can not unconfinedly increase.Thus designing one can suppress platform column wave to be climbed, and prevent more unrestrained generation, and then the device tool reducing the initial air gap of semi-submerged platform is of great significance.
summary of the invention:
The object of this invention is to provide a kind of compact conformation, economical and practical, can effectively suppress semi-submerged platform column wave to climb, check more unrestrained generation, and then reduce the device of semi-submerged platform initial air gap.
The present invention is achieved by the following technical programs:
A kind of device reducing the initial air gap of semi-submerged platform, comprise the annular wave eliminating board of guide shell and multilayer setting, the big up and small down inverted cone barrel of described guide shell, annular wave eliminating board is spaced along the column axial stratification of semi-submerged platform, be fixed between column and guide shell, multi-layer annular wave eliminating board external diameter successively decreases from column upper end to lower end; Annular wave eliminating board and guide shell are respectively equipped with multiple circular hole, and arc flanging is extended in guide shell upper end, and described arc flanging top is fixedly connected with the upper body lower deck of semi-submerged platform, and guide shell lower end is fixed on the lower buoyancy aid upper side of semi-submerged platform; The radial gusset that several piece is uniform is also provided with between column and guide shell.
Object of the present invention can also be realized further by following technical measures.
The device of the initial air gap of aforesaid reduction semi-submerged platform, the wherein vertical setting of staggering of circular hole of adjacent two layers annular wave eliminating board.Circular hole area sum on guide shell is 0.45 ~ 0.55 of guide shell face area.
A kind of device reducing the initial air gap of semi-submerged platform, comprise the wave absorption ring body of arc guide ring and multilayer setting, described arc guide ring arc top is fixed on the junction of upper body lower deck and column upper end upward, the wave absorption ring body that described multilayer is arranged is spaced along axial stratification in the middle part of column and is fixedly connected with column, wave absorption ring body surface is provided with multiple lightening hole, uniform multiple radial support frame in wave absorption ring body; Wave absorption ring body is up-small and down-big cone table, and the cross-sectional plane of described cone table side is triangular in shape, and the wave absorption ring body outside diameter that multilayer is arranged successively decreases from top to bottom.
Object of the present invention can also be realized further by following technical measures.
The device of the initial air gap of aforesaid reduction semi-submerged platform, wherein basecoat wave absorption ring body is apart from waterline distance A=1.8 ~ 2.2m.The back taper stage body that described wave absorption ring body is big up and small down, the cross-sectional plane of described back taper stage body side is del, and the outside diameter of multilayer wave absorption ring body increases progressively from top to bottom.
A kind of device reducing the initial air gap of semi-submerged platform, comprise arc guide ring and ordered series of numbers to be spaced and the arc wave eliminating board that arranges of helix along column axial stratification, described arc guide ring arc top is fixed on the periphery, junction of upper body lower deck and column upper end upward, the arc wave eliminating board of two row radially adjoinings is crisscross arranged, and hand of spiral is contrary; Be fixed on inside arc wave eliminating board on column, between arc wave eliminating board upper and lower sides and column, be also respectively equipped with polylith gusset; Arc wave eliminating board is provided with the wave eliminating board lightening hole of number row spaced radial arrangement, and the upper and lower symmetry of hemispherical shell is separately fixed on arc wave eliminating board both sides.
Object of the present invention can also be realized further by following technical measures.
The device of the initial air gap of aforesaid reduction semi-submerged platform, wherein the perpendicular separation B of same row arc wave eliminating board upper and lower two panels arc wave eliminating board is 0.5 ~ 0.6 of local marine site wave wave height, the width C of arc wave absorption plate is 0.12 ~ 0.125 of column diameter D, pitch angle alpha will=30 ° of arc wave absorption plate, inside arc wave absorption plate, arc length is 0.33 ~ 0.35 of column girth.Hemispherical shell on adjacent two row arc wave eliminating boards is symmetrical arranged.The same cross-sectional plane of arc wave absorption plate place column is provided with 4 arc wave absorption plates.
Structure of the present invention is simple, and guide shell and multi-layer annular wave eliminating board or multilayer wave absorption ring body or ordered series of numbers arc wave eliminating board can effectively stop wave to climb along column, prevent more unrestrained generation, and then reduce the initial air gap of semi-submerged platform.During incoming flow, the wave climbed along guide shell or multilayer wave absorption ring body or ordered series of numbers arc wave eliminating board due to the arc wave absorption plate of circular hole or the column left and right sides interlaced, guide wave wave absorption step by step, until the wave angle of climb is spent broken greatly and voluntarily.Thus suppress semi-submerged platform column wave to climb, check more unrestrained generation.
Advantage and disadvantage of the present invention, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below, these embodiments, only provide as an example with reference to accompanying drawing.
accompanying drawing illustrates:
Fig. 1 is the outside drawing of the embodiment of the present invention one;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is the structural representation of the embodiment of the present invention two;
Fig. 5 is the structural representation of the embodiment of the present invention three;
Fig. 6 is the C-C cutaway view of Fig. 4;
Fig. 7 is I enlarged view of Fig. 2;
Fig. 8 is the structural representation of the embodiment of the present invention four;
Fig. 9 is that the D-D of Fig. 8 analyses and observe 3-91 figure;
Figure 10 is the E-E cutaway view Amplified image of Fig. 8.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The semi-submerged platform 3 of four embodiments all for being made up of upper body 31, column 32, lower buoyancy aid 33 below, the present embodiment upper body 31 is of a size of 80m × 70m × 5m, and column 32 is of a size of 22m × φ 15m, and lower buoyancy aid 33 is of a size of 90m × 15m × 8m.
Embodiment one
As shown in FIG. 1 to 3, the present embodiment comprises the annular wave eliminating board 2 of guide shell 1 and multilayer setting, and annular wave eliminating board 2 is arranged on outside the column 32 of semi-submerged platform 3.The big up and small down inverted cone barrel of guide shell 1, the annular wave eliminating board 2 adopting plurality of steel plates welding to arrange in multilayer forms.Annular wave eliminating board 2 is spaced along column 32 axial stratification of semi-submerged platform 3, is weldingly fixed between column 32 and guide shell 1.Annular wave eliminating board 2 external diameter that multilayer is arranged successively decreases from column 32 upper end to lower end.Annular wave eliminating board 2 and guide shell 1 are respectively equipped with multiple circular hole 11, and circular hole area 11 sum on guide shell 1 is 0.5 of guide shell 1 face area, substantially improves the wave dissipation effect of the present embodiment.
Arc flanging 12 is extended in guide shell 1 upper end, and the upper body lower deck 311 of described arc flanging 12 top and semi-submerged platform 3 is soldered, and guide shell 1 lower end is welded on the lower buoyancy aid 33 of semi-submerged platform 3.When the wave that wave height is higher reaches upper body lower deck 32 lower surface, the guide functions of 4251 arc flangings 12, makes wave change and flows to, and prevents the generation of attacking deck and more unrestrained phenomenon, and energy using wave to restrict wave, weaken the effect of next wave.Between column 32 and guide shell 1, be also provided with 8 pieces of uniform radial gussets 4, play the booster action to guide shell 1.The vertical setting of staggering of circular hole 11 of adjacent two layers annular wave eliminating board 2, makes the wave entering guide shell 1 inside cannot climb too high along column 32,
Embodiment two
As shown in Fig. 4, Fig. 6 and Fig. 7, the present embodiment comprises the wave absorption ring body 6 of arc guide ring 5 and multilayer setting, arc guide ring 5 arc top is weldingly fixed on the periphery, junction of upper body lower deck 311 and column 32 upper end upward, the wave absorption ring body 6 that multilayer is arranged is spaced along axial stratification in the middle part of column 32 and is welded and fixed with vertical 7, wave absorption ring body 6 surface is provided with multiple lightening hole 61, uniform 16 radial support framves 62 in annular wave absorption body 6; Wave absorption ring body 6 is in up-small and down-big cone table, and the cross-sectional plane of described cone table side is triangular in shape, and wave absorption ring body 6 outside diameter that multilayer is arranged successively decreases from top to down, forms forge piece of step type structure, plays wave absorbing function step by step.Basecoat wave absorption ring body 6 is apart from waterline distance A=2m, and the present embodiment is applicable to the larger marine site of wave intensity, and multilayer wave absorption ring body 6 plays and guides the wave effect of climbing until the wave angle of climb is spent broken greatly and voluntarily.
Embodiment three
As shown in Figure 5, the cone table that the wave absorption ring body 6 of the present embodiment is big up and small down, the cross-sectional plane of described cone table side is del, the outside diameter of the wave absorption ring body 6 that multilayer is arranged increases progressively from top to down, all the other structures are identical with embodiment two, the present embodiment supplementing as embodiment two, is applicable to the marine site that wave intensity is less.
Embodiment four
As shown in Fig. 8 ~ Figure 10, the present embodiment comprises arc guide ring 5@and is spaced and the arc wave eliminating board 7 of helix setting along column 32 axial stratification, arc guide ring 5 is identical with the structure of embodiment two, three, and arc top is fixed on the periphery, junction of upper body lower deck 311 and column 32 upper end upward.The arc wave eliminating board 7 of two row radially adjoinings is crisscross arranged, and hand of spiral is contrary; Be weldingly fixed on column 32 inside arc wave eliminating board 7, between arc wave eliminating board 7 upper and lower sides and column 32, be also respectively equipped with polylith gusset 71.Arc wave eliminating board 7 is provided with the wave eliminating board lightening hole 72 of number row spaced radial arrangement, and hemispherical shell about 73 symmetry is weldingly fixed on arc wave eliminating board 7 both sides respectively.
The perpendicular separation B of same row arc wave eliminating board about 7 two panels arc wave eliminating board 7 is 0.5 of local marine site wave wave height, the width C of arc wave absorption plate 7 is 0.125 of column 32 diameter D, pitch angle alpha will=30 ° of arc wave absorption plate 7, inside arc wave absorption plate 7, arc length is 0.33 of column 32 girth.
The present embodiment solves the broken difficult problem that column 32 is head sea and carried on the back wave.The adjacent arc wave eliminating board 7 of two row be simultaneously crisscross arranged plays wave absorption, guiding wave trend layer by layer, the twisting resistance that abatement wave column 32 causes and the effect guiding wave broken gradually, thus minimizing wave is to the impact of upper body lower deck 311.Arc guide ring 5 plate below upper body lower deck 311 is its last guarantee together especially, and protection upper body lower deck 31 is from alluvion.Upper and lower symmetry is weldingly fixed on respectively on the hemispherical shell 73 on arc wave eliminating board 7 both sides and more contributes to cutting down wave, comparatively gentle to the effect of wave, safer more durable.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of application claims.
Claims (10)
1. one kind reduces the device of the initial air gap of semi-submerged platform, it is characterized in that, comprise the annular wave eliminating board of guide shell and multilayer setting, the big up and small down inverted cone barrel of described guide shell, annular wave eliminating board is spaced along the column axial stratification of semi-submerged platform, be fixed between column and guide shell, the annular wave eliminating board external diameter that multilayer is arranged successively decreases from column upper end to lower end; Annular wave eliminating board and guide shell are respectively equipped with multiple circular hole, and arc flanging is extended in guide shell upper end, and described arc flanging top is fixedly connected with the upper body lower deck of semi-submerged platform, and guide shell lower end is fixed on the lower buoyancy aid upper side of semi-submerged platform; The radial gusset that several piece is uniform is also provided with between column and guide shell.
2. the device reducing the initial air gap of semi-submerged platform as claimed in claim 1, is characterized in that, the vertical setting of staggering of circular hole of adjacent two layers annular wave eliminating board.
3. the device reducing the initial air gap of semi-submerged platform as claimed in claim 1, it is characterized in that, the circular hole area sum on guide shell is 0.45 ~ 0.55 of guide shell face area.
4. one kind reduces the device of the initial air gap of semi-submerged platform as claimed in claim 1, it is characterized in that, comprise the wave absorption ring body of arc guide ring and multilayer setting, described arc guide ring arc top is fixed on the periphery, junction of upper body lower deck and column upper end upward, the wave absorption ring body that multilayer is arranged is spaced along axial stratification in the middle part of column and is fixedly connected with column, wave absorption ring body surface is provided with multiple lightening hole, uniform multiple radial support frame in wave absorption ring body; Wave absorption ring body is up-small and down-big cone table, and the cross-sectional plane of described cone table side is triangular in shape, and the wave absorption ring body outside diameter that multilayer is arranged successively decreases from top to bottom.
5. the device reducing the initial air gap of semi-submerged platform as claimed in claim 4, is characterized in that, basecoat wave absorption ring body is apart from waterline distance A=1.8 ~ 2.2m.
6. the device reducing the initial air gap of semi-submerged platform as claimed in claim 4, it is characterized in that, the back taper stage body that described wave absorption ring body is big up and small down, the cross-sectional plane of described back taper stage body side is del, and the outside diameter of the wave absorption ring body that multilayer is arranged increases progressively from top to bottom.
7. one kind reduces the device of the initial air gap of semi-submerged platform as claimed in claim 1, it is characterized in that, comprise arc guide ring and ordered series of numbers to be spaced and the arc wave eliminating board that arranges of helix along column axial stratification, described arc guide ring arc top is fixed on the periphery, junction of upper body lower deck and column upper end upward, the arc wave eliminating board of two row radially adjoinings is crisscross arranged, and hand of spiral is contrary; Be fixed on inside arc wave eliminating board on column, between arc wave eliminating board upper and lower sides and column, be also respectively equipped with polylith gusset; Arc wave eliminating board is provided with the wave eliminating board lightening hole of number row spaced radial arrangement, and the upper and lower symmetry of hemispherical shell is separately fixed on arc wave eliminating board both sides.
8. the device reducing the initial air gap of semi-submerged platform as claimed in claim 7, it is characterized in that, wherein the perpendicular separation B of same row arc wave eliminating board upper and lower two panels arc wave eliminating board is 0.5 ~ 0.6 of local marine site wave wave height, the width C of arc wave absorption plate is 0.12 ~ 0.125 of column diameter D, pitch angle alpha will=30 ° of arc wave absorption plate, inside arc wave absorption plate, arc length is 0.33 ~ 0.35 of column girth.
9. the device reducing liquid sloshing in the moon pool of ocean engineering structure as claimed in claim 7, it is characterized in that, the hemispherical shell on adjacent two row arc wave eliminating boards is symmetrical arranged.
10. the device reducing the initial air gap of semi-submerged platform as claimed in claim 7, it is characterized in that, the same cross-sectional plane of arc wave absorption plate place column is provided with 4 arc wave absorption plates.
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| CN201510161168.5A CN104743075A (en) | 2015-04-08 | 2015-04-08 | Device for reducing initial air gap of semi-submersible platform |
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| CN201510161168.5A CN104743075A (en) | 2015-04-08 | 2015-04-08 | Device for reducing initial air gap of semi-submersible platform |
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Cited By (5)
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| CN107458550A (en) * | 2016-06-06 | 2017-12-12 | 朱剑文 | Air cushion auto-strengthening bogey is carried under adjustable overlapping stable floating water |
| CN107458548A (en) * | 2016-06-06 | 2017-12-12 | 朱剑文 | Porous media material wave absorption stability float module |
| CN109080781A (en) * | 2018-08-01 | 2018-12-25 | 上海交通大学 | A kind of inhibition wave climbs pore structure object device and its design method |
| CN112078739A (en) * | 2020-08-14 | 2020-12-15 | 中国海洋石油集团有限公司 | Semi-submersible platform |
| CN113581367A (en) * | 2021-07-20 | 2021-11-02 | 海洋石油工程股份有限公司 | Marine oil floating platform individual layer tilting wave wall structure |
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