JPH06336185A - Structural material for self-supporting rectangular liquefied gas tank - Google Patents
Structural material for self-supporting rectangular liquefied gas tankInfo
- Publication number
- JPH06336185A JPH06336185A JP12637193A JP12637193A JPH06336185A JP H06336185 A JPH06336185 A JP H06336185A JP 12637193 A JP12637193 A JP 12637193A JP 12637193 A JP12637193 A JP 12637193A JP H06336185 A JPH06336185 A JP H06336185A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing
- tank
- curling
- sections
- reinforcing plates
- 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.)
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自立角型液化ガスタン
クの構造材に係り、特に、タンク重量を支持する部分等
の強度及び溶接性の向上を図るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural material for a self-supporting square type liquefied gas tank, and particularly to improve the strength and weldability of the portion supporting the weight of the tank.
【０００２】[0002]
【従来の技術】液体運搬船の例として、特開平２−２４
９７９６号公報（液体運搬船）、特開平４−８９９９号
公報（液体運搬船用ガスタンクの支持装置）、特開平４
−９２７９４号公報（液体運搬船用ガスタンクの支持装
置）等が提案されている。2. Description of the Related Art As an example of a liquid carrier, Japanese Patent Laid-Open No. 2-24
No. 9796 (liquid carrier), JP-A-4-8999 (gas tank support device for liquid carrier), JP-A-4
No. 92794 (a gas tank supporting device for a liquid carrier) is proposed.
【０００３】これらの液体運搬船では、図４ないし図６
に示すように、船体（船殻）１の中空部２に搭載される
タンク３の形状を長方体（角型）とすることによって、
甲板の平坦化を容易にするとともに、液化ガス等の液体
の収納容積を拡大することができる。In these liquid carriers, FIGS.
As shown in, by making the shape of the tank 3 mounted in the hollow portion 2 of the hull (hull) 1 rectangular (rectangular),
It is possible to easily flatten the deck and to expand the storage volume of liquid such as liquefied gas.
【０００４】また、船体１の部分は、安全性を向上させ
るために、外側殻１Ａ及び内側殻１Ｂからなる二重構造
を採用し、タンク３にあっては、図５及び図６に示すよ
うに、底部が複数の支持装置４によって支持される自立
角型タンクとする計画がなされている。Further, in order to improve safety, the part of the hull 1 adopts a double structure consisting of an outer shell 1A and an inner shell 1B, and the tank 3 has a double structure as shown in FIGS. In addition, it is planned to make a self-standing square tank whose bottom is supported by a plurality of supporting devices 4.
【０００５】この自立角型タンク（タンク）３における
タンク隔壁５の内面には、図５及び図７に示すように、
内方に突出した状態の大骨６やスティフナ等の補強板７
が、相互直交状態に複数取り付けられて、全体の剛性を
得るように設定されている。On the inner surface of the tank partition wall 5 of this self-supporting rectangular tank (tank) 3, as shown in FIG. 5 and FIG.
Reinforcement plate 7 such as large bone 6 and stiffener protruding inward
, Are attached in a mutually orthogonal state, and are set so as to obtain the overall rigidity.
【０００６】したがって、支持装置４は、図７に示すよ
うに、大骨６と隣合う対をなす補強板７とがそれぞれ介
在する位置に配設される。支持装置４がタンク３の荷重
を受ける場合には、対をなす補強板７及びその間のタン
ク隔壁５が相対的に上方に押されることにより、タンク
隔壁５と補強板７との隅肉溶接部等の発生応力が大きく
なる傾向を示す。図８に示すように、隣合う補強板７の
間には、補強板７やその隅肉溶接部８の補強を行なうカ
ーリング材９が、タンク隔壁５及び補強板７に対してそ
れぞれ直交状態に、溶接部１０によって取り付けられ
る。Therefore, as shown in FIG. 7, the support device 4 is arranged at a position where the large bone 6 and the reinforcing plate 7 forming an adjacent pair are respectively interposed. When the support device 4 receives the load of the tank 3, the pair of reinforcing plates 7 and the tank partition wall 5 between them are relatively pushed upward, so that the fillet welded portion between the tank partition wall 5 and the reinforcing plate 7 is pushed. And the like, tend to increase the generated stress. As shown in FIG. 8, a curling material 9 that reinforces the reinforcing plate 7 and the fillet weld portion 8 is provided between the adjacent reinforcing plates 7 in an orthogonal state to the tank partition wall 5 and the reinforcing plate 7. , Attached by the weld 10.
【０００７】この際に、カーリング材９の上縁部と補強
板７の補強面材７ａとの間に、溶接トーチの先端を挿入
し得るだけの間隙、つまり、所要間隔Ｇを形成しておく
ようにすると、溶接部１０を連続的に形成したいわゆる
回し溶接として、補強板７や隅肉溶接部８の強度を向上
させることができる。At this time, a gap is formed between the upper edge portion of the curling material 9 and the reinforcing face material 7a of the reinforcing plate 7 so that the tip of the welding torch can be inserted, that is, a required gap G is formed. By doing so, the strength of the reinforcing plate 7 and the fillet welded portion 8 can be improved by so-called turning welding in which the welded portion 10 is continuously formed.
【０００８】[0008]
【発明が解決しようとする課題】しかし、カーリング材
９を補強板７の間に介在状態に取り付けると、隅肉溶接
部８の近傍の発生応力を低減することができるものと期
待されるが、補強板７の側面とカーリング材９の上縁部
との境界近傍における応力値の検討を十分に実施する必
要がある。However, it is expected that the stress generated in the vicinity of the fillet welded portion 8 can be reduced by mounting the curling material 9 between the reinforcing plates 7 in an interleaved manner. It is necessary to sufficiently study the stress value in the vicinity of the boundary between the side surface of the reinforcing plate 7 and the upper edge of the curling material 9.
【０００９】図８例の構造について、応力解析を行なっ
たところ、図９の鎖線の部分に支持装置４が配されて、
矢印で示すような支持力が印加された場合における発生
応力は、後に詳述する条件下において、隅肉溶接部８の
近傍の発生応力が、３．２ｋｇ／ｍｍ2 である場合に、
補強板７の側面とカーリング材９の上縁部との境界近傍
の応力値が、最大８．３ｋｇ／ｍｍ2 となる比較的大き
な値となる現象が見られた。When stress analysis was performed on the structure of the example of FIG. 8, the supporting device 4 was arranged at the portion indicated by the chain line in FIG.
The stress generated when a supporting force as indicated by an arrow is applied is as follows, when the stress generated in the vicinity of the fillet welded portion 8 is 3.2 kg / mm 2 under the conditions described in detail below.
It was observed that the stress value near the boundary between the side surface of the reinforcing plate 7 and the upper edge of the curling material 9 was a relatively large value of 8.3 kg / mm 2 at maximum.
【００１０】また、カーリング材９の上縁部を補強面材
７ａの下面に直接溶接すれば、発生応力の低減が可能に
なると期待されるが、この場合には、回し溶接ができな
くなり、疲労強度が低下するという他の解決すべき問題
が新たに発生する。Further, it is expected that the generated stress can be reduced by directly welding the upper edge of the curling material 9 to the lower surface of the reinforcing surface material 7a. Another problem to be solved is a new problem of reduced strength.
【００１１】本発明は、これらの事情に鑑みてなされた
もので、タンク重量を支持する部分等について、その強
度を確保しながら溶接性を向上させることを目的として
いる。The present invention has been made in view of these circumstances, and it is an object of the present invention to improve the weldability of a portion supporting the weight of a tank while ensuring its strength.
【００１２】[0012]
【課題を解決するための手段】自立角型液化ガスタンク
の構造材にあって、タンク隔壁の内面に内方に突出した
状態に配される複数の補強板と、該補強板の内方縁部に
一体に配される補強面材と、隣合う補強板の間に介在状
態に溶接されるカーリング材とを具備し、カーリング材
が補強面材と所要間隔を空けて配されるとともに、該カ
ーリング材に、補強板との接合箇所からの離間距離にと
もなって内方への突出量を緩やかに低減した状態の切欠
部を有する内方縁部が形成される構成を採用している。In a structural material of a self-supporting square type liquefied gas tank, a plurality of reinforcing plates arranged inwardly projecting on an inner surface of a tank partition, and inner edge portions of the reinforcing plates. And a curling material that is welded in an intervening state between adjacent reinforcing plates, and the curling material is arranged at a required distance from the reinforcing surface material, and the curling material is attached to the curling material. The configuration is such that an inner edge portion having a cutout portion in which the amount of inward projection is gently reduced is formed along with the distance from the joint with the reinforcing plate.
【００１３】[0013]
【作用】カーリング材の内方縁部が補強面材と所要間隔
を空けて配されることによって、回し溶接による溶接部
の形成が可能となり、溶接性が確保される。カーリング
材に切欠部が形成されることにより、荷重印加時の応力
分布が緩やかなものとなって、補強板との接合部近傍の
発生応力を低減する。The inner edge of the curling material is arranged at a required distance from the reinforcing surface material, so that the welded portion can be formed by turning welding and the weldability is ensured. By forming the notch in the curling material, the stress distribution when a load is applied becomes gentle, and the stress generated near the joint with the reinforcing plate is reduced.
【００１４】[0014]
【実施例】以下、本発明に係る自立角型液化ガスタンク
の構造材の一実施例について、図１ないし図３を参照し
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the structural material of the self-standing square type liquefied gas tank according to the present invention will be described below with reference to FIGS.
【００１５】図１及び図２に示すカーリング材１１は、
隣合う補強板７の間に介在した状態に配され、溶接部１
０によって取り付けられるものであるが、寸法及び形状
が、以下に述べるように設定される。The curling material 11 shown in FIGS. 1 and 2 is
The welded portion 1 is arranged so as to be interposed between the adjacent reinforcing plates 7.
Although it is attached by 0, the size and shape are set as described below.
【００１６】つまり、カーリング材１１にあっては、そ
の内方縁部が、補強板７における補強面材７ａと前述の
所要間隔Ｇを空けて配され、補強板７との接合部近傍
に、曲線状の切欠部１１ａが形成される。該切欠部１１
ａにあっては、図１に示すように、補強板７との接合部
近傍が曲率Ｒとされ、中央部の高さｄを減少させたもの
に設定されている。That is, in the curling material 11, the inner edge portion thereof is arranged with the above-mentioned required distance G from the reinforcing surface material 7a of the reinforcing plate 7, and near the joint portion with the reinforcing plate 7. A curved notch 11a is formed. The notch 11
In a, as shown in FIG. 1, the vicinity of the joint with the reinforcing plate 7 has a curvature R, and the height d of the central portion is reduced.
【００１７】また、図１例における各部の寸法は、例え
ばＧ：４０ｍｍ以上、ｂ：１５ｍｍ以上、ｄ：ＸＸｍ
ｍ、Ｒ：３０ｍｍ以上、ｔ：ＸＸｍｍとされる。The size of each part in the example of FIG. 1 is, for example, G: 40 mm or more, b: 15 mm or more, d: XXm.
m, R: 30 mm or more, t: XX mm.
【００１８】このようなタンクの構造材であると、カー
リング材１１をタンク隔壁５及び補強板７に隅肉溶接す
る際に、図２の矢印で示すように、溶接部１０の部分が
回し溶接となり、信頼性を向上させることができる。With such a structural material of the tank, when the curling material 11 is fillet-welded to the tank partition wall 5 and the reinforcing plate 7, as shown by an arrow in FIG. Therefore, the reliability can be improved.
【００１９】〔検討モデル例〕図３は、対をなす補強板
７の間に、支持装置４が配されてタンクの荷重が支持さ
れ、その一つ当たりの支持荷重が４２００００ｋｇであ
る場合における応力解析例を示すものである。ただし、
図３にあっては各条件を以下のように設定した。 タンク隔壁５の材料：Ａｌ５０８３−Ｏ、厚さ：２５ｍ
ｍ、補強板７の間隔：９００ｍｍ、補強板７の厚さ：１
２ｍｍ、高さ：４５０ｍｍ、Ｇ：４０ｍｍ、ｂ：１５ｍ
ｍ、ｄ：３５０ｍｍ、Ｒ：３０ｍｍ、ｔ：１８ｍｍ。な
お、対比される図９にあっては、タンク隔壁５の材料：
Ａｌ５０８３−Ｏ、厚さ：２５ｍｍ、補強板７の間隔：
９００ｍｍ、補強板７の厚さ：１２ｍｍ、高さ：４５０
ｍｍ、Ｇ：４０ｍｍ、ｄ：３５０ｍｍ、ｔ：１８ｍｍに
設定した。[Example of Study Model] FIG. 3 shows a stress in the case where the supporting device 4 is arranged between the pair of reinforcing plates 7 to support the load of the tank, and the supporting load per one is 420,000 kg. It shows an example of analysis. However,
In FIG. 3, each condition was set as follows. Material of tank partition wall 5: Al5083-O, thickness: 25 m
m, spacing between the reinforcing plates 7: 900 mm, thickness of the reinforcing plates 7: 1
2 mm, height: 450 mm, G: 40 mm, b: 15 m
m, d: 350 mm, R: 30 mm, t: 18 mm. In FIG. 9 for comparison, the material of the tank partition wall 5 is:
Al5083-O, thickness: 25 mm, spacing between reinforcing plates 7:
900 mm, thickness of reinforcing plate 7: 12 mm, height: 450
mm, G: 40 mm, d: 350 mm, t: 18 mm.
【００２０】〔検討結果〕図３例にあっては、隅肉溶接
部８の近傍に発生する引っ張り応力値が、２．３ｋｇ／
ｍｍ2 、補強板７の側面とカーリング材１１の上縁部と
の境界近傍に発生する引っ張り応力値が、３．０ｋｇ／
ｍｍ2 となり、図９の比較箇所における値が、３．２ｋ
ｇ／ｍｍ2 及び８．３ｋｇ／ｍｍ2 であることと比較し
て、図３例の値の優位性が明確である。[Results of Examination] In the example of FIG. 3, the tensile stress value generated in the vicinity of the fillet weld 8 is 2.3 kg /
mm 2 , the tensile stress value generated near the boundary between the side surface of the reinforcing plate 7 and the upper edge of the curling material 11 was 3.0 kg /
mm 2 and the value at the comparison point in FIG. 9 is 3.2 k.
Compared with g / mm 2 and 8.3 kg / mm 2 , the superiority of the values in the example of FIG. 3 is clear.
【００２１】〔他の実施態様〕本発明にあっては、実施
例に代えて以下の技術を採用することができる。 ａ）液体運搬船以外の自立タンクに適用すること。 ｂ）図１における寸法ｂを零に近似させること。 ｃ）寸法Ｒで表わしている曲線状の切欠部１１ａの形状
を任意とすること。[Other Embodiments] In the present invention, the following techniques can be adopted instead of the embodiments. a) Applicable to self-supporting tanks other than liquid carriers. b) Approximate the dimension b in FIG. 1 to zero. c) The shape of the curved notch 11a represented by the dimension R is arbitrary.
【００２２】[0022]
【発明の効果】本発明に係る自立角型液化ガスタンクの
構造材にあっては、以下の効果を奏する。 （１） タンク隔壁の内面に配される複数の補強板と、
補強板に配される補強面材と、隣合う補強板の間に介在
状態に溶接されるカーリング材とを具備し、カーリング
材が補強面材と所要間隔を空けて配されるとともに、該
カーリング材に、内方への突出量を緩やかに低減した状
態の切欠部を有する内方縁部が形成されることにより、
タンク隔壁について荷重が大きくなる部分の強度を向上
させ、特に、タンク重量が集中する部分の強度を向上さ
せることができる。 （２）カーリング材の内方縁部が補強面材と所要間隔を
空けて配され、かつ、切欠部が形成されることにより、
溶接トーチの挿入を容易にし、溶接性を向上させること
ができる。The structural material of the self-standing square type liquefied gas tank according to the present invention has the following effects. (1) A plurality of reinforcing plates arranged on the inner surface of the tank partition,
The reinforcing surface material arranged on the reinforcing plate and the curling material welded in an intervening state between the adjacent reinforcing plates are provided, and the curling material is arranged at a required distance from the reinforcing surface material and , By forming an inner edge portion having a notch in which the amount of inward protrusion is gradually reduced,
It is possible to improve the strength of a portion of the tank partition where the load increases, and particularly to improve the strength of the portion where the tank weight is concentrated. (2) By arranging the inner edge of the curling material at a required distance from the reinforcing surface material and forming the notch,
The welding torch can be easily inserted and the weldability can be improved.
【図１】本発明に係る自立角型液化ガスタンクの構造材
の一実施例を示す一部を省略した正面図である。FIG. 1 is a partially omitted front view showing an embodiment of a structural material of a self-standing square type liquefied gas tank according to the present invention.
【図２】図１の構造材における溶接状況を示す斜視図で
ある。FIG. 2 is a perspective view showing a welding situation in the structural material of FIG.
【図３】図１の構造材及びカーリング材における応力解
析図である。FIG. 3 is a stress analysis diagram of the structural material and curling material of FIG.
【図４】液体運搬船の例を示す正面図である。FIG. 4 is a front view showing an example of a liquid carrier.
【図５】液体運搬船の例を示す横断面図である。FIG. 5 is a cross-sectional view showing an example of a liquid carrier.
【図６】自立角型タンクの支持装置の配置状況を示す平
面図である。FIG. 6 is a plan view showing an arrangement state of a support device for a self-supporting rectangular tank.
【図７】自立角型タンクの内面の補強状況を示す平面図
である。FIG. 7 is a plan view showing how the inner surface of the self-supporting rectangular tank is reinforced.
【図８】図７におけるカーリング材の取り付け状態を示
す正面図である。8 is a front view showing how the curling material in FIG. 7 is attached.
【図９】図８の構造材及びカーリング材における応力解
析図である。FIG. 9 is a stress analysis diagram of the structural material and the curling material of FIG.
１ 船体（船殻） １Ａ 外側殻 １Ｂ 内側殻 ２ 中空部 ３ タンク（自立角型タンク） ４ 支持装置 ５ タンク隔壁 ６ 大骨 ７ 補強板 ７ａ 補強面材 ８ 隅肉溶接部 １０ 溶接部 １１ カーリング材 １１ａ 切欠部 Ｇ 所要間隔 1 Hull (Hull) 1A Outer Shell 1B Inner Shell 2 Hollow Part 3 Tank (Self-standing Square Tank) 4 Support Device 5 Tank Partition 6 Large Bone 7 Reinforcing Plate 7a Reinforcing Surface Material 8 Fillet Welding Area 10 Welding Area 11 Curling Material 11a Notch G Required space
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【手続補正書】[Procedure amendment]
【提出日】平成６年５月２６日[Submission date] May 26, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１７[Correction target item name] 0017
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１７】また、図１例における各部の寸法は、例え
ばＧ：４０ｍｍ以上、ｂ：１５ｍｍ以上、ｄ：３５０ｍ
ｍ、Ｒ：３０ｍｍ以上、ｔ：１８ｍｍとされる。The size of each part in the example of FIG. 1 is, for example, G: 40 mm or more, b: 15 mm or more, d: 350 m.
m, R: 30 mm or more, t: 18 mm .
Claims (1)
に配される複数の補強板と、該補強板の内方縁部に一体
に配される補強面材と、隣合う補強板の間に介在状態に
溶接されるカーリング材とを具備し、カーリング材が補
強面材と所要間隔を空けて配されるとともに、該カーリ
ング材に、補強板との接合箇所からの離間距離にともな
って内方への突出量を緩やかに低減した状態の切欠部を
有する内方縁部が形成されることを特徴とする自立角型
液化ガスタンクの構造材。1. A plurality of reinforcing plates arranged in an inwardly projecting state on the inner surface of the tank partition wall, a reinforcing surface member integrally disposed on an inner edge of the reinforcing plate, and an adjacent reinforcing plate. A curling material that is welded in an intervening state is provided, and the curling material is arranged at a required distance from the reinforcing face material, and the curling material is arranged inward with the distance from the joint with the reinforcing plate. 1. A structural material for a self-standing rectangular liquefied gas tank, characterized in that an inner edge portion having a cutout portion in which the amount of protrusion to the inside is gently reduced is formed.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12637193A JPH06336185A (en) | 1993-05-27 | 1993-05-27 | Structural material for self-supporting rectangular liquefied gas tank |
| US08/174,892 US5375547A (en) | 1993-04-09 | 1993-12-27 | Self-standing liquefied gas storage tank and liquefied gas carrier ship therefor |
| TW082111029A TW310306B (en) | 1993-04-09 | 1993-12-27 | |
| EP93403195A EP0619222B1 (en) | 1993-04-09 | 1993-12-28 | Self-standing liquefied gas storage tank and liquefied gas carrier ship therefor |
| ES93403195T ES2116424T3 (en) | 1993-04-09 | 1993-12-28 | LIQUEFIED GAS SELF-SUPPORTING STORAGE TANK AND LIQUEFIED GAS CARGO SHIP FOR. |
| DE69317409T DE69317409T2 (en) | 1993-04-09 | 1993-12-28 | Self-standing liquid gas container and liquid gas transport ship for it |
| KR1019940000730A KR100305513B1 (en) | 1993-04-09 | 1994-01-17 | Free standing liquefied gas storage tank and liquefied gas carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12637193A JPH06336185A (en) | 1993-05-27 | 1993-05-27 | Structural material for self-supporting rectangular liquefied gas tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06336185A true JPH06336185A (en) | 1994-12-06 |
Family
ID=14933526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12637193A Pending JPH06336185A (en) | 1993-04-09 | 1993-05-27 | Structural material for self-supporting rectangular liquefied gas tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06336185A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707998A (en) * | 2014-01-06 | 2014-04-09 | 大连理工大学 | Damping type oscillation prevention cabin wall for independent C-type cargo hold of LNG injection ship |
| JP2017159370A (en) * | 2017-06-26 | 2017-09-14 | 株式会社Ihi | Fillet weld method |
| CN110239658A (en) * | 2019-06-14 | 2019-09-17 | 上海外高桥造船有限公司 | Intersect component and intersects the connection method of component |
-
1993
- 1993-05-27 JP JP12637193A patent/JPH06336185A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707998A (en) * | 2014-01-06 | 2014-04-09 | 大连理工大学 | Damping type oscillation prevention cabin wall for independent C-type cargo hold of LNG injection ship |
| JP2017159370A (en) * | 2017-06-26 | 2017-09-14 | 株式会社Ihi | Fillet weld method |
| CN110239658A (en) * | 2019-06-14 | 2019-09-17 | 上海外高桥造船有限公司 | Intersect component and intersects the connection method of component |
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| A02 | Decision of refusal |
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