JP3192959B2 - Anti-vibration tank structure - Google Patents
Anti-vibration tank structureInfo
- Publication number
- JP3192959B2 JP3192959B2 JP02178396A JP2178396A JP3192959B2 JP 3192959 B2 JP3192959 B2 JP 3192959B2 JP 02178396 A JP02178396 A JP 02178396A JP 2178396 A JP2178396 A JP 2178396A JP 3192959 B2 JP3192959 B2 JP 3192959B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- vertical pipe
- vibration
- horizontal
- tank structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Vibration Prevention Devices (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、油槽船などのタン
ク構造に関する。The present invention relates to a tank structure for an oil tanker or the like.
【０００２】[0002]
【従来の技術】油槽船のタンク構造は、その水平断面を
図７に示すように、船体外板１やタンク内隔壁２，水平
方向タンク内構材３などから構成される。そして、船体
外板１やタンク内隔壁２には防撓材４が配設され、また
タンク内構材３にも防撓材５や倒れ止め肘板６が配設さ
れている。2. Description of the Related Art As shown in FIG. 7, the tank structure of an oil tanker is composed of a hull outer plate 1, a tank inner partition 2, a horizontal tank inner member 3, and the like. A stiffener 4 is provided on the hull outer panel 1 and the tank inner partition 2, and a stiffener 5 and a fall-preventing elbow 6 are also provided on the tank internal component 3.
【０００３】ここで、タンク内構材３の横倒れ固有円振
動数は、一般に空水時には十分高く問題ないが満水時
（接水時）には接水効果による重量増加のため低下し
て、船舶の推進装置の起振力振動数域に存在する場合が
あり、水平方向タンク内構材３が共振現象を呈してタン
ク内構造が損傷することも考慮しなければならなかっ
た。このため水平方向タンク内構材３の横倒れ固有円振
動数を船舶の推進装置の起振力の振動数域から離隔させ
る工夫が必要であり、従来の手法の代表例としては、図
７に示すように倒れ止め肘板６を増設して剛性を増加さ
せ、同内構材３の固有円振動数の上昇を図ることが挙げ
られる。[0003] Here, the lateral falling natural circular frequency of the tank Uchigamae member 3 is generally in but not high enough problems when an empty water at full capacity (at water contact) decreases because of the weight increase due to water contact effect, There is a case where the vibration is in the frequency range of the excitation force of the propulsion device of the ship, and it has to be considered that the horizontal internal tank material 3 exhibits a resonance phenomenon and the internal tank structure is damaged. For this reason, it is necessary to devise a method of keeping the natural frequency of the horizontal side tank 3 falling away from the frequency range of the vibrating force of the propulsion device of the ship. A typical example of the conventional method is shown in FIG. As shown in the figure, it is possible to increase the rigidity by adding the fall-preventing elbow plate 6 to increase the natural circular frequency of the internal structural member 3.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の手法では、本来横倒れ防止の観点から必要と
される倒れ止め肘板６を、剛性増加のため数多く増設す
ることになるので、タンク構造の重量増加を招くと共に
工作性が低下するという不具合がある。本発明は、この
ような事情に鑑みて提案されたものであり、倒れ止め肘
板の増設を必要とせずに、接水時の振動応答増大を防止
できるようにした防振型タンク構造を提供することを目
的とする。However, in such a conventional method, a large number of fall-preventing elbow plates 6, which are originally required from the viewpoint of prevention of lateral fall, are increased in order to increase rigidity. There is a problem that the weight of the structure is increased and the workability is reduced. The present invention has been proposed in view of the above circumstances, and provides a vibration-proof tank structure that can prevent an increase in vibration response at the time of contact with water without requiring an additional fall-prevention arm plate. The purpose is to do.
【０００５】[0005]
【課題を解決するための手段】前述の目的を達成するた
め、本発明の防振型タンク構造は、液体貯溜用タンクに
タンク内構材をそなえるとともに、同タンク内構材に固
着された容器状区画部材をそなえ、上記タンク内への液
体貯溜時に上記容器状区画部材の内部への液体浸入を許
容しながら同容器状区画部材の内部に残留空気部を形成
しうるように、同容器状区画部材の周壁部に小孔が設け
られていることを特徴としている。In order to achieve the above-mentioned object, a vibration-proof type tank structure according to the present invention comprises a liquid storage tank provided with a tank internal material and a container fixed to the tank internal material. The container-shaped partition member is provided so as to form a residual air portion inside the container-shaped partition member while allowing liquid to enter the interior of the container-shaped partition member when the liquid is stored in the tank. A small hole is provided in the peripheral wall of the partition member.
【０００６】上記タンク内構材の配置構成や上記容器状
区画部材の形状等は任意に設定されるが、一実施形態と
しては、上記タンクの上記タンク内構材が、上記タンク
の内面に沿い水平方向に固着された板状体からなる水平
方向タンク内構材として設けられ、上記容器状区画部材
が上記水平方向タンク内構材に装備され上端を閉塞され
た複数の竪管として構成されて、同竪管の周壁に上記小
孔が設けられる。また上記複数の竪管は、相互間に液体
連通部を有するようにして対をなしながら配設されるこ
とが望ましい。[0006] The arrangement of the tank internal material, the shape of the container-like partition member, and the like can be arbitrarily set. In one embodiment, the tank internal material of the tank extends along the inner surface of the tank. It is provided as a horizontal tank internal member made of a plate-like body fixed in the horizontal direction, and the container-like partition member is configured as a plurality of vertical pipes mounted on the horizontal tank internal member and closed at the upper end. The small hole is provided in a peripheral wall of the vertical pipe. Further, it is desirable that the plurality of vertical pipes be arranged in pairs so as to have a liquid communication portion between them.
【０００７】そして、上記複数の竪管として上下に対を
なす上部竪管と下部竪管とをそなえ、上記上部竪管が、
上記水平方向タンク内構材の開口部に裾部外周を密嵌さ
れ同開口部下方まで貫通するようにして同タンク内構材
上に立設されるともに、上記下部竪管が上記上部竪管の
下端開口部周壁を下方から取り囲むように上記水平方向
タンク内構材の下面に装着された形態がある。さらに、
上記複数の竪管として上記水平方向タンク内構材上に並
設された長竪管と短竪管とをそなえ、上記液体連通部が
上記の長竪管および短竪管の各下部を相互に連通する水
平管として設けられて、上記小孔が上記の長竪管および
短竪管の各下部周壁と上記水平管よりも上方の各上部周
壁とにそれぞれ設けられた形態もある。[0007] An upper vertical pipe and a lower vertical pipe which form a pair as the plurality of vertical pipes are provided.
The skirt outer periphery is tightly fitted into the opening of the horizontal tank internal material, and is erected on the tank internal material so as to penetrate below the opening. Is mounted on the lower surface of the horizontal tank internal member so as to surround the lower end opening peripheral wall from below. further,
The plurality of vertical pipes includes a long vertical pipe and a short vertical pipe arranged side by side on the horizontal tank material, and the liquid communication part connects the lower parts of the long vertical pipe and the short vertical pipe to each other. There is also a mode in which the small holes are provided on the lower peripheral walls of the long vertical pipe and the short vertical pipe and the upper peripheral walls above the horizontal pipe, respectively.
【０００８】上述のような竪管構造を配設すると、タン
ク内に液体を貯溜する際に、小孔を介して竪管内部にも
液体が流入すると共に、各竪管の上方にはそれぞれ空気
が封入されるので、各竪管内部の液体の質量と残留空気
のばね要素とによって、動吸振器としての効果が発生す
る。したがってこの竪管構造に作用する力の反力によっ
て水平方向タンク内構材の振動を抑制することができ
る。When the above-described vertical pipe structure is provided, when the liquid is stored in the tank, the liquid also flows into the vertical pipe through the small holes, and the air is above each vertical pipe. Is sealed, the effect of the dynamic vibration absorber is generated by the mass of the liquid inside each vertical tube and the spring element of the residual air. Therefore, the vibration of the internal members in the horizontal tank can be suppressed by the reaction force of the force acting on the vertical pipe structure.
【０００９】[0009]
【発明の実施の形態】本発明による防振型タンク構造の
実施形態を図面を用いて説明すると、図１はその第１実
施形態としての防振型タンク構造の要部横断面図、図２
は第２実施形態として防振型タンク構造の要部横断面図
であり、図３および図４はそれぞれ第１実施形態および
第２実施形態の機構を説明する模式図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vibration-proof tank structure according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a vibration-proof tank structure as a first embodiment of the present invention.
FIG. 3 is a cross-sectional view of a main part of a vibration-proof tank structure according to a second embodiment, and FIGS. 3 and 4 are schematic views illustrating the mechanisms of the first embodiment and the second embodiment, respectively.
【００１０】図１に示す第１実施形態では油槽船におけ
る液体貯溜用タンクが船体外板１の内方に隔壁で仕切ら
れるようにして形成されて、同外板１や隔壁に結合され
た水平方向タンク内構材３をそなえており、同タンク内
構材３の防振のため、周壁部に小孔９を有する容器状区
画部材としての上部竪管７と下部竪管８とが、タンク内
液体貯溜時に図３に示すごとく残留空気部としての上部
空気部13および下部空気部14を形成できるようにしなが
ら、上下に対をなして設けられている。すなわち、上部
竪管７は、水平方向タンク内構材３の開口部に裾部外周
を密嵌され同開口部下方まで貫通するようにして、同タ
ンク内構材３上に立設され、下部竪管８は、上部竪管７
の下端開口部周壁を下方から取り囲むように、水平方向
タンク内構材３の下面に装着されている。In the first embodiment shown in FIG. 1, a liquid storage tank in an oil tanker is formed inside a hull outer plate 1 so as to be partitioned by a partition wall, and is horizontally connected to the outer plate 1 and the partition wall. An upper vertical pipe 7 and a lower vertical pipe 8 as container-shaped partition members having small holes 9 in the peripheral wall are provided for the vibration control of the tank internal material 3. As shown in FIG. 3, when the internal liquid is stored, the upper air portion 13 and the lower air portion 14 are formed as a pair of upper and lower air portions so that the upper air portion 13 and the lower air portion 14 can be formed. That is, the upper vertical pipe 7 is erected on the tank internal member 3 so that the outer periphery of the skirt is closely fitted to the opening of the horizontal tank internal member 3 and penetrates to below the opening. The vertical pipe 8 is the upper vertical pipe 7
Is mounted on the lower surface of the horizontal tank internal member 3 so as to surround the lower end opening peripheral wall from below.
【００１１】また本発明の第２実施形態としての防振型
タンク構造では、図２に示すように、油槽船の船体外板
１の内方に形成された液体貯溜用タンクにおいて、水平
方向タンク内構材３に、容器状区画部材としての長竪管
10と短竪管11とが対をなして並設されており、これらの
竪管10，11の各下部相互を連通する水平管12が設けられ
て、各竪管10，11の閉塞された上端部に、タンク内液体
貯溜時に図４に示すごとく残留空気部としての上部空気
部13および下部空気部14を的確に形成できるように、各
竪管10，11の周壁部には複数の小孔９が形成されてい
る。すなわち、長竪管10および短竪管11の各下部周壁と
水平管12よりも上方の各上部周壁とに、それぞれ小孔９
が形成されている。As shown in FIG. 2, in a vibration damping type tank structure according to a second embodiment of the present invention, a liquid storage tank formed inside a hull outer plate 1 of an oil tanker is provided with a horizontal tank. A long vertical pipe as a container-like partitioning member for the internal structure 3
10 and a short vertical pipe 11 are arranged side by side in a pair, and a horizontal pipe 12 communicating each lower part of these vertical pipes 10 and 11 is provided, and each vertical pipe 10 and 11 is closed. At the upper end, a plurality of small air tubes are provided on the peripheral wall of each of the vertical tubes 10 and 11 so that the upper air portion 13 and the lower air portion 14 as residual air portions can be accurately formed as shown in FIG. A hole 9 is formed. That is, a small hole 9 is formed in each lower peripheral wall of the long vertical pipe 10 and the short vertical pipe 11 and in each upper peripheral wall above the horizontal pipe 12.
Are formed.
【００１２】ここで、本タンク構造に液体を貯溜する場
合、第１実施形態および第２実施形態のいずれの場合
も、小孔９を介して各竪管８〜11の内部および連通管と
しての水平管12の内部にも液体は流入する。しかし、各
竪管８〜11の内部の一部の空気は竪管内部に残留すると
ともに液体により圧縮されて各竪管の上部に封入され
る。すなわち、図３，４に示すように、第１実施形態で
は上部竪管７の上端部に上部空気部13が形成され、下部
竪管８の上端部に下部空気部14が形成される。また第２
実施形態では長竪管10の上端部に上部空気部13，短竪管
11の上端部に下部空気部14がそれぞれ形成される。Here, in the case of storing the liquid in the present tank structure, in both the first embodiment and the second embodiment, the inside of each of the vertical pipes 8 to 11 and the communication pipe as the communication pipe are formed through the small holes 9. The liquid also flows inside the horizontal pipe 12. However, a part of the air inside each of the vertical pipes 8 to 11 remains inside the vertical pipes and is compressed by the liquid and sealed in the upper part of each vertical pipe. That is, as shown in FIGS. 3 and 4, in the first embodiment, an upper air portion 13 is formed at the upper end of the upper vertical tube 7, and a lower air portion 14 is formed at the upper end of the lower vertical tube 8. Also the second
In the embodiment, the upper air portion 13 and the short vertical
A lower air portion 14 is formed at the upper end of each of 11.
【００１３】このとき、各空気部13，14に残留した封入
空気をばね要素とし、竪管内および水平管内の液体を質
量要素とする１自由度系が形成される。この振動系の固
有円振動数ω0は［数１］式で与えられる。At this time, a one-degree-of-freedom system is formed in which the sealed air remaining in each of the air portions 13 and 14 is used as a spring element, and the liquid in the vertical pipe and the horizontal pipe is used as a mass element. The natural circular frequency ω 0 of this vibration system is given by Expression 1.
【数１】ω0＝√{Ｇ(１＋α)＋Ｋ/ρ(Ｐ1/ｈ1＋Ｐ2/ｈ2
・α)}／(Ｈ1＋αＨ2＋βＬ) 但し、α＝Ａ1／Ａ2，β＝Ａ1／ａ ここで、 Ｈ1，Ａ1：上部竪管７または長竪管10の水位および断面
積 Ｈ2，Ａ2：下部竪管８または短竪管11の水位および断面
積 Ｌ，ａ：上部竪管７と下部竪管８との間の距離および両
竪管間の開孔部断面積（第１実施形態の場合）：水平管
12の長さおよび断面積（第２実施形態の場合） Ｐ1，ｈ1：上部空気部13の圧力および高さ Ｐ2，ｈ2：下部空気部14の圧力および高さ （以上図３および図４参照） Ｋ：空気の比熱比 ρ：液体の密度 Ｇ：重力加速度 そして、竪管７，８，10，11の寸法や小孔９の高さなど
は、［数１］式で得られる竪管構造の固有円振動数ω0
が水平方向タンク内構材３の横倒れ振動の固有円振動数
と一致するように設定されている。Ω 0 = √ {G (1 + α) + K / ρ (P 1 / h 1 + P 2 / h 2
Α)} / (H 1 + αH 2 + βL) where α = A 1 / A 2 , β = A 1 / a, where H 1 , A 1 : water level and cutoff of the upper vertical pipe 7 or the long vertical pipe 10. Area H 2 , A 2 : Water level and sectional area of lower vertical pipe 8 or short vertical pipe 11 L, a: Distance between upper vertical pipe 7 and lower vertical pipe 8 and cross-sectional area of opening between both vertical pipes (In the case of the first embodiment): Horizontal tube
12 Length and cross-sectional area (in the case of the second embodiment) P 1 , h 1 : pressure and height of upper air portion 13 P 2 , h 2 : pressure and height of lower air portion 14 (see FIG. 3 and FIG. K: Specific heat ratio of air ρ: Density of liquid G: Acceleration of gravity And the dimensions of the vertical pipes 7, 8, 10, 11 and the height of the small holes 9 can be obtained by [Equation 1]. Natural circular frequency ω 0 of vertical pipe structure
Is set to coincide with the natural circular frequency of the sideways vibration of the horizontal internal tank material 3.
【００１４】さて、水平方向タンク内構材３の横倒れ固
有円振動数が共振した場合を考えると、この場合の起振
力Ｆと、水平方向タンク内構材３の横倒れ方向すなわち
鉛直上下方向の振動変位ｙとの関係は、図５の(a)，(b)
図のように、振動変位ｙの位相が起振力Ｆに対して90°
遅れる。次に水平方向タンク内構材３の振動変位によっ
て誘起される竪管内液体の重心の振動変位ｘも、前述の
ように竪管内液体の形成する振動系が共振しているため
に、図５の(c)図のように水平方向タンク内構材３の振
動変位ｙに対して位相が90°遅れる。このとき、竪管内
液体に発生する慣性力をＦIとすると、その反作用力ＦC
が水平方向タンク内構材３に作用する。Now, considering the case where the natural frequency of the horizontal falling tank member 3 resonates, the vibrating force F in this case and the horizontal falling direction of the horizontal tank member 3, that is, the vertical up and down direction, The relationship between the vibration displacement y in the direction is shown in FIGS.
As shown in the figure, the phase of the vibration displacement y is 90 ° with respect to the excitation force F.
Be late. Next, the vibration displacement x of the center of gravity of the liquid in the vertical pipe induced by the vibration displacement of the internal material 3 in the horizontal tank is also shown in FIG. 5 because the vibration system formed by the liquid in the vertical pipe resonates as described above. (c) As shown in the figure, the phase is delayed by 90 ° with respect to the vibration displacement y of the horizontal internal tank material 3. At this time, assuming that the inertial force generated in the liquid in the vertical pipe is F I , its reaction force F C
Acts on the horizontal tank internal member 3.
【００１５】ここで、ＦIとＦCは［数２］，［数３］式
で求められる。Here, F I and F C are obtained by Equations 2 and 3.
【数２】ＦI＝Ｍ・(ｄ2ｘ／ｄｔ2）## EQU2 ## F I = M ・ (d 2 x / dt 2 )
【数３】ＦC＝−ＦI 但し、Ｍ：竪管構造内液体の有効質量 そして、［数２］式および［数３］式より［数４］式が
成り立つ。Equation 3] F C = -F I where, M: effective mass of Tatekan structure in the liquid and, [Expression 4] equation holds from Equation 2 Equation and Equation 3 expression.
【数４】ＦC＝−ＦI＝Ｍ・(ｄ2ｘ／ｄｔ2)＝Ｍω2ｘ 但し、ω：水平方向タンク内構材３の横倒れ固有円振動
数## EQU4 ## where F C = −F I = M · (d 2 x / dt 2 ) = Mω 2 x, where ω is the natural frequency of the horizontal falling of the internal tank material 3.
【００１６】すなわち、［数４］式より図５の(d)図に
示すように作用力ＦCと竪管内液体重心の振動変位ｘと
は同位相である。以上をまとめると、図５に示すように
作用力ＦCは起振力Ｆと逆位相になる。したがって、作
用力ＦCは起振力Ｆを打消す方向に作用するので、有効
起振力Ｆ＋ＦCは実際の起振力Ｆに比べて小さくなる。
このため、水平方向タンク内構材３の振動応答を、竪管
構造が無い場合に比べて小さくすることができる。That is, from equation (4), the acting force F C and the vibration displacement x of the liquid center of gravity in the vertical pipe are in the same phase as shown in FIG. 5 (d). To summarize the above, the acting force F C has the opposite phase to the vibrating force F as shown in FIG. Therefore, since the acting force F C acting in a direction to cancel the vibratory force F, the effective excitation force F + F C is smaller than the actual excitation force F.
For this reason, the vibration response of the horizontal tank internal member 3 can be reduced as compared with the case where there is no vertical pipe structure.
【００１７】このような本発明の効果を従来の手法の効
果と比較して、模式的に図６に示す。同図中において、
破線15は未対策構造の水平方向タンク内構材の振動加速
度を表す曲線であり、一点鎖線16は倒れ止め肘板６を増
設した従来対策構造の場合を示し、実線17は本発明の防
振型タンク構造の場合を示している。従来の対策による
構造では、その固有円振動数を上昇させるために多数の
倒れ止め肘板６を必要とする上に、新たな固有円振動数
が別の起振力と共振する可能性が残った。これに対し、
本発明のタンク構造ではその振動応答を全体的に抑制す
ることができ、別起振力との共振現象の懸念もなく、こ
の点でも有効である。FIG. 6 schematically shows the effect of the present invention in comparison with the effect of the conventional method. In the figure,
The dashed line 15 is a curve representing the vibration acceleration of the horizontal tank material of the unmeasured structure, the dashed line 16 shows the case of the conventional countermeasure structure in which the fall-preventing elbow plate 6 is added, and the solid line 17 shows the vibration control of the present invention. This shows the case of a mold tank structure. In the structure according to the conventional measures, a large number of fall-preventing elbow plates 6 are required to raise the natural frequency, and the possibility that the new natural frequency resonates with another vibrating force remains. Was. In contrast,
In the tank structure of the present invention, the vibration response can be suppressed as a whole, and there is no concern about a resonance phenomenon with another vibrating force, which is also effective in this respect.
【００１８】[0018]
【発明の効果】以上述べたように本発明の防振型タンク
構造によれば、タンク内構材に固着された容器状区画部
材の周壁に小孔をそなえて、タンク内液体貯溜時に上記
容器状区画部材の内部に残留空気部を形成できるように
したので、タンク内構材の振動応答を全体的に抑制でき
るようになり、従来手法に比べてタンク内構材の共振現
象による損傷発生を簡易な手段で高い信頼性を保ちなが
ら防止することができる。また上記容器状区画部材とし
て、竪管を採用することにより、そのタンク内構材への
取り付け工作が容易になり、新造船のみならず既存の油
槽船にも容易に適用できるようになる。そして、複数の
竪管が相互に連通しながらタンク内構材上に長竪管およ
び短竪管のごとく対をなして並設されたり、上部竪管お
よび下部竪管のごとく上下に対をなして装備されると、
各残留空気部の協働作用によりタンク内構材に対する防
振作用が一層的確に行なわれるようになる効果がある。As described above, according to the anti-vibration tank structure of the present invention, a small hole is provided in the peripheral wall of the container-shaped partition member fixed to the tank internal material, and the above-mentioned container is stored when the liquid is stored in the tank. Since the residual air portion can be formed inside the partition member, the vibration response of the tank internal material can be suppressed as a whole, and the occurrence of damage due to the resonance phenomenon of the tank internal material can be reduced compared to the conventional method. It can be prevented by simple means while maintaining high reliability. In addition, by employing a vertical pipe as the container-like partitioning member, the work of attaching the vertical pipe to the internal material of the tank is facilitated, so that it can be easily applied to an existing oil tanker as well as a new ship. A plurality of vertical pipes are connected to each other while being connected to each other in a tank like a long vertical pipe and a short vertical pipe while communicating with each other. When equipped
The cooperative action of the residual air portions has the effect that the vibration damping action on the tank internal material is more accurately performed.
【図１】本発明の第１実施形態としての防振型タンク構
造の要部横断面図である。FIG. 1 is a cross-sectional view of a main part of a vibration-proof tank structure according to a first embodiment of the present invention.
【図２】本発明の第２実施形態としての防振型タンク構
造の要部横断面図である。FIG. 2 is a cross-sectional view of a main part of a vibration-proof tank structure according to a second embodiment of the present invention.
【図３】図１のタンク構造の機構を説明する模式図であ
る。FIG. 3 is a schematic diagram illustrating a mechanism of the tank structure in FIG. 1;
【図４】図２のタンク構造の機構を説明する模式図であ
る。FIG. 4 is a schematic diagram illustrating a mechanism of the tank structure in FIG. 2;
【図５】(a)〜(b)図はいずれも本発明の防振型タンク構
造の作用を説明する線図である。FIGS. 5A and 5B are diagrams illustrating the operation of the vibration-proof tank structure of the present invention.
【図６】本発明の防振型タンク構造の効果を従来手法と
比較した線図である。FIG. 6 is a diagram comparing the effect of the vibration isolating tank structure of the present invention with a conventional method.
【図７】従来のタンク構造の要部を示す水平断面図であ
る。FIG. 7 is a horizontal sectional view showing a main part of a conventional tank structure.
【図８】図７のＡ−Ａ矢視断面図である。8 is a sectional view taken along the line AA of FIG. 7;
１ 船体外板 ２ タンク内隔壁 ３ 水平方向タンク内構材 ４，５ 防撓材 ６ 倒れ止め肘板 ７ 上部竪管 ８ 下部竪管 ９ 小孔 10 長竪管 11 短竪管 12 水平管 13 上部空気部 14 下部空気部 15 未対策構造のタンク内構材の振動応答曲線 16 従来対策構造のタンク内構材の振動応答曲線 17 本発明構造のタンク内構材の振動応答曲線 DESCRIPTION OF SYMBOLS 1 Hull outer board 2 Tank inner bulkhead 3 Horizontal tank internal material 4,5 Stiffener 6 Fall down arm plate 7 Upper vertical pipe 8 Lower vertical pipe 9 Small hole 10 Long vertical pipe 11 Short vertical pipe 12 Horizontal pipe 13 Upper Ventilation part 14 Lower air part 15 Vibration response curve of tank material of unmeasured structure 16 Vibration response curve of tank material of conventional structure 17 Vibration response curve of tank material of the present invention structure
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B63B 25/08 B63B 43/00 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) B63B 25/08 B63B 43/00
Claims (5)
えるとともに、同タンク内構材に固着された容器状区画
部材をそなえ、上記タンク内への液体貯溜時に上記容器
状区画部材の内部への液体浸入を許容しながら同容器状
区画部材の内部に残留空気部を形成しうるように、同容
器状区画部材の周壁部に小孔が設けられていることを特
徴とする、防振型タンク構造。1. A liquid storage tank comprising a tank internal material and a container-shaped partition member fixed to the tank internal material, wherein the liquid is stored in the tank when the liquid is stored in the tank. A small hole is provided in a peripheral wall portion of the container-shaped partition member so that a residual air portion can be formed inside the container-shaped partition member while permitting liquid intrusion. Tank structure.
いて、上記タンク内構材が、上記タンクの内面に沿い水
平方向に固着された板状体からなる水平方向タンク内構
材として設けられ、上記容器状区画部材が上記水平方向
タンク内構材に装備され上端を閉塞された複数の竪管と
して構成されて、同竪管の周壁に上記小孔が設けられて
いることを特徴とする、防振型タンク構造。2. The vibration-insulating tank structure according to claim 1, wherein the tank internal member is provided as a horizontal tank internal member made of a plate-like body fixed in a horizontal direction along an inner surface of the tank. The container-like partitioning member is configured as a plurality of vertical pipes mounted on the horizontal tank internal member and closed at the upper end, and the small hole is provided on a peripheral wall of the vertical pipe. The anti-vibration tank structure.
いて、上記複数の竪管が相互間に液体連通部を有するよ
うにして対をなしながら配設されたことを特徴とする、
防振型タンク構造。3. The anti-vibration tank structure according to claim 2, wherein the plurality of vertical pipes are arranged in pairs so as to have a liquid communication portion between them.
Vibration-proof tank structure.
いて、上記複数の竪管として上下に対をなす上部竪管と
下部竪管とをそなえ、上記上部竪管が、上記水平方向タ
ンク内構材の開口部に裾部外周を密嵌され同開口部下方
まで貫通するようにして同タンク内構材上に立設される
ともに、上記下部竪管が上記上部竪管の下端開口部周壁
を下方から取り囲むように上記水平方向タンク内構材の
下面に装着されたことを特徴とする、防振型タンク構
造。4. The anti-vibration tank structure according to claim 3, further comprising an upper vertical pipe and a lower vertical pipe paired up and down as the plurality of vertical pipes, wherein the upper vertical pipe is provided in the horizontal tank. The lower part of the upper vertical pipe is connected to the lower part of the upper vertical pipe while the lower part of the upper vertical part is erected on the tank inner part so that the outer periphery of the hem part is closely fitted to the opening of the inner part and penetrates to the lower part of the opening. An anti-vibration tank structure, which is mounted on a lower surface of the horizontal tank internal material so as to surround a peripheral wall from below.
いて、上記複数の竪管として上記水平方向タンク内構材
上に並設された長竪管と短竪管とをそなえ、上記液体連
通部が上記の長竪管および短竪管の各下部を相互に連通
する水平管として設けられて、上記小孔が上記の長竪管
および短竪管の各下部周壁と上記水平管よりも上方の各
上部周壁とにそれぞれ設けられたことを特徴とする、防
振型タンク構造。5. The anti-vibration tank structure according to claim 3, further comprising a plurality of vertical pipes, a long vertical pipe and a short vertical pipe, which are juxtaposed on the internal material of the horizontal tank. The communicating part is provided as a horizontal pipe which communicates each lower part of the long vertical pipe and the short vertical pipe with each other, and the small hole is smaller than each lower peripheral wall of the long vertical pipe and the short vertical pipe and the horizontal pipe. A vibration-proof tank structure provided on each of the upper peripheral walls above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02178396A JP3192959B2 (en) | 1996-01-12 | 1996-01-12 | Anti-vibration tank structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02178396A JP3192959B2 (en) | 1996-01-12 | 1996-01-12 | Anti-vibration tank structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09193887A JPH09193887A (en) | 1997-07-29 |
| JP3192959B2 true JP3192959B2 (en) | 2001-07-30 |
Family
ID=12064670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02178396A Expired - Fee Related JP3192959B2 (en) | 1996-01-12 | 1996-01-12 | Anti-vibration tank structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3192959B2 (en) |
-
1996
- 1996-01-12 JP JP02178396A patent/JP3192959B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09193887A (en) | 1997-07-29 |
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