JP6219455B1 - Ship ice piece interference test method and ship ice piece interference test facility - Google Patents
Ship ice piece interference test method and ship ice piece interference test facility Download PDFInfo
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Abstract
【課題】実際の氷海船舶の航行状態を簡易かつ廉価に模擬することができ、推進器に対する氷片の影響を適切かつ迅速に評価することができる、船舶の氷片干渉試験方法及び船舶の氷片干渉試験設備を提供する。【解決手段】本発明の一実施形態に係る船舶の氷片干渉試験設備１は、複数の氷片Ｃが敷き詰められた水路２と、船首部３１ｂから船尾部３１ｓまでの船底３１を模擬するとともに船尾部３１ｓの後方に推進器３２を備えた模型船３と、模型船３を水路２内で氷片Ｃに対して相対的に移動させる移動機構４と、を備えている。【選択図】図１An object of the present invention is to provide a ship ice piece interference test method and ship ice capable of simulating an actual ice-sea ship in a simple and inexpensive manner and capable of appropriately and quickly evaluating the influence of ice pieces on a propulsion device. A single interference test facility is provided. A ship ice piece interference test facility 1 according to an embodiment of the present invention simulates a water channel 2 in which a plurality of ice pieces C are spread, and a ship bottom 31 from a bow portion 31b to a stern portion 31s. A model ship 3 provided with a propulsion device 32 behind the stern part 31 s and a moving mechanism 4 that moves the model ship 3 relative to the ice piece C in the water channel 2 are provided. [Selection] Figure 1
Description
本発明は、船舶の氷片干渉試験方法及び船舶の氷片干渉試験設備に関し、特に、氷海を航行する船舶の推進器に対する氷片の干渉試験を行うための船舶の氷片干渉試験方法及び船舶の氷片干渉試験設備に関する。 The present invention relates to a ship ice piece interference test method and a ship ice piece interference test facility, and more particularly to a ship ice piece interference test method and a ship for performing an ice piece interference test on a propulsion device of a ship navigating the ice sea. It relates to the ice piece interference test facility.
氷海を航行する船舶（氷海船舶）では、船底に潜り込んだ氷片が船舶の移動に伴い船底に沿って移動し、船尾に配置されている推進器に干渉することがある。特に、砕氷船のように氷盤を割って進む船の場合、生成される氷片の量が多く、氷片が推進器のスクリュープロペラに巻き込まれ易い。氷片が推進器に干渉すると、推力が減少し、また、氷片によるトルク（アイス・トルク）の増加によって推進能力が低下する。さらには、氷片が推進器のスクリュープロペラやシャフトに衝突して推進器が損傷を被るおそれもある。 In a ship navigating the ice sea (ice sea ship), ice pieces that have entered the bottom of the ship may move along the bottom of the ship as the ship moves, and may interfere with a propeller disposed at the stern. In particular, in the case of a ship that breaks an ice plate and travels like an icebreaker, the amount of ice pieces that are generated is large, and the ice pieces are easily caught in the propeller screw propeller. When the ice piece interferes with the propeller, the thrust is reduced, and the propulsion capability is reduced due to an increase in torque (ice torque) caused by the ice piece. In addition, ice pieces may collide with the propeller screw propeller or shaft and damage the propeller.
そのため、氷海船舶の推進器には、氷片の干渉に十分に耐えることのできる強度が要求される。また、推進器に対する氷片の干渉が少ない船底形状を検討することも重要である。したがって、氷海船舶は、その建造に先立ち、推進器に対する氷片の干渉の影響を十分に評価しておく必要がある。 For this reason, the propulsion device for ice-sea ships is required to have sufficient strength to withstand the interference of ice pieces. It is also important to consider the shape of the bottom of the ship where there is less interference of ice pieces with the propeller. Therefore, prior to construction of an ice-sea vessel, it is necessary to sufficiently evaluate the influence of ice piece interference on the propeller.
そこで、推進器に対する氷片の干渉評価を行う試験装置が既に考案されている（例えば、特許文献１参照）。特許文献１に記載された試験装置では、予め切れ目を入れて一定の大きさに割れるように設定した氷板を水路に浮かべ、推進器が一体に形成された船模型船を水路に沿って移動させ、船首部分で氷板を割って一定の大きさの氷片とした後、この氷片を推進器に干渉させることでその影響を評価している。 Therefore, a test apparatus for evaluating the interference of ice pieces with the propulsion device has already been devised (for example, see Patent Document 1). In the test apparatus described in Patent Document 1, an ice plate set in advance so as to be cut and broken to a certain size is floated on a water channel, and a ship model ship in which a propeller is integrally formed is moved along the water channel. After breaking the ice plate at the bow to make a piece of ice of a certain size, the influence is evaluated by making this piece of ice interfere with the propeller.
特許文献１に記載された発明では、船幅に近い一定の大きさの氷片を推進器に衝突させて干渉試験を行っており、特殊な船首形状を有する砕氷船を試験対象としたものである。したがって、特許文献１に記載された発明では、全ての氷片が推進器に干渉することを前提としている。 In the invention described in Patent Document 1, an interference test is performed by causing ice pieces of a certain size close to the ship width to collide with the propulsion device. is there. Therefore, in the invention described in Patent Document 1, it is assumed that all ice pieces interfere with the propeller.
しかしながら、一般的な氷海船舶では、実際の氷片はもっと小さく、船舶の移動に伴って船体から離散していく氷片も含まれている。したがって、特許文献１に記載された試験方法は、必ずしも氷海船舶にとって最適な試験方法を提供するものではなかった。 However, in general ice-sea ships, the actual ice pieces are smaller and include ice pieces that disperse from the hull as the ship moves. Therefore, the test method described in Patent Document 1 does not necessarily provide an optimal test method for ice-sea ships.
本発明は、実際の氷海船舶の航行状態を簡易かつ廉価に模擬することができ、推進器に対する氷片の影響を適切かつ迅速に評価することができる、船舶の氷片干渉試験方法及び船舶の氷片干渉試験設備を提供することを目的とする。 The present invention is capable of simulating an actual ice-sea ship navigation state simply and inexpensively, and can appropriately and quickly evaluate the influence of ice pieces on a propulsion device. The purpose is to provide an ice piece interference test facility.
本発明によれば、複数の氷片が敷き詰められた水路に、少なくとも船首部から船尾部までの船底を模擬するとともに前記船尾部の後方に推進器を備えた模型船を投入し、前記模型船を前記氷片に対して相対的に移動させ、前記推進器に対する前記氷片の干渉試験を行う際に、前記船尾部又は前記船首部の傾斜角度を調整して前記干渉試験を行う、ことを特徴とする船舶の氷片干渉試験方法が提供される。
According to the present invention, a model ship equipped with a propulsion device at the rear of the stern part and simulated at least on the ship bottom from the bow part to the stern part is inserted into a water channel in which a plurality of ice pieces are spread, and the model ship When the interference test of the ice piece relative to the propeller is performed, the interference test is performed by adjusting an inclination angle of the stern part or the bow part. A characteristic ship ice piece interference test method is provided.
前記氷片は、前記模型船を前記水路内で移動させる前に、大きさ又は密度が調整されていてもよい。 The size or density of the ice pieces may be adjusted before the model ship is moved in the water channel.
また、本発明によれば、複数の氷片が敷き詰められた水路と、少なくとも船首部から船尾部までの船底を模擬するとともに前記船尾部の後方に推進器を備えた模型船と、前記模型船を前記水路内で前記氷片に対して相対的に移動させる移動機構と、を備え、前記模型船は、前記船尾部又は前記船首部の傾斜角度が調整可能に構成されている、ことを特徴とする船舶の氷片干渉試験設備が提供される。
Further, according to the present invention, a waterway in which a plurality of ice pieces are spread, a model ship that simulates at least a ship bottom from the bow part to the stern part, and has a propeller behind the stern part, and the model ship the example Bei and a moving mechanism configured to move relative to the ice pieces in said water passage, the model ship, the inclination angle of the stern or the bow are configured to be adjustable, the A characteristic ship ice piece interference test facility is provided.
前記水路は、横幅が前記模型船の横幅に応じて調整可能に構成されていてもよい。 The water channel may be configured such that the lateral width can be adjusted according to the lateral width of the model ship.
上述した本発明に係る船舶の氷片干渉試験方法及び船舶の氷片干渉試験設備によれば、複数の氷片が敷き詰められた水路に、少なくとも船首部から船尾部までの船底を模擬した模型船を投入し、この模型船を水路内で氷片に対して相対的に移動させるようにしたことから、水路に敷き詰められる氷片の大きさや密度を任意に調整することができ、模型船の構造を簡略化することができる。したがって、実際の氷海船舶の航行状態を簡易かつ廉価に模擬することができ、推進器に対する氷片の影響を適切かつ迅速に評価することができる。 According to the ship ice piece interference test method and ship ice piece interference test facility according to the present invention described above, a model ship simulating the bottom of the ship from at least the bow to the stern in a water channel in which a plurality of ice pieces are spread. Since the model ship was moved relative to the ice pieces in the waterway, the size and density of the ice pieces spread on the waterway can be adjusted arbitrarily, and the structure of the model ship Can be simplified. Therefore, it is possible to simply and inexpensively simulate the actual navigation state of an ice sea vessel, and to appropriately and quickly evaluate the influence of ice pieces on the propulsion device.
以下、本発明の実施形態について図１〜図４を用いて説明する。ここで、図１は、本発明の一実施形態に係る船舶の氷片干渉試験設備を示す側面図である。図２は、図１に示した氷片干渉試験設備を示す平面図である。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a side view showing a ship ice piece interference test facility according to an embodiment of the present invention. FIG. 2 is a plan view showing the ice piece interference test facility shown in FIG.
本発明の一実施形態に係る船舶の氷片干渉試験設備１は、図１及び図２に示したように、複数の氷片Ｃが敷き詰められた水路２と、船首部３１ｂから船尾部３１ｓまでの船底３１を模擬するとともに船尾部３１ｓの後方に推進器３２を備えた模型船３と、模型船３を水路２内で氷片Ｃに対して相対的に移動させる移動機構４と、を備えている。 As shown in FIGS. 1 and 2, a ship ice piece interference test facility 1 according to an embodiment of the present invention includes a water channel 2 laid with a plurality of ice pieces C, and from a bow portion 31 b to a stern portion 31 s. And a moving mechanism 4 for moving the model ship 3 relative to the ice piece C in the water channel 2. The model ship 3 includes a propulsion device 32 behind the stern part 31 s. ing.
水路２は、模型船を投入可能な水槽によって構成される。水路２の横幅Ｗは、図２に示したように、少なくとも模型船３の横幅よりも僅かに大きく設定されていることが好ましい。この水路２の横幅Ｗは、水槽の横幅そのものであってもよいし、模型船３の横幅に応じて調整可能に構成されていてもよい。具体的には、水路２を構成する水槽内に板材等の調整部材を配置して水路２の横幅Ｗを調整することができる。 The water channel 2 is constituted by a water tank into which a model ship can be inserted. As shown in FIG. 2, the lateral width W of the water channel 2 is preferably set to be slightly larger than at least the lateral width of the model ship 3. The lateral width W of the water channel 2 may be the lateral width of the water tank itself, or may be configured to be adjustable according to the lateral width of the model ship 3. Specifically, the width W of the water channel 2 can be adjusted by disposing an adjusting member such as a plate material in the water tank constituting the water channel 2.
氷片Ｃの大きさは、必要に応じて変更することができ、任意の大きさのものを水槽内の水又は水溶液に必要な量だけ投入し、浮遊させることができる。すなわち、水路２に敷き詰められる氷片Ｃの大きさ及び密度は、水路２内に模型船３を投入する前又は模型船３を投入した後であっても、任意に調整することができる。また、氷片Ｃは異なる大きさのものを混在させるようにしてもよい。 The size of the ice piece C can be changed as necessary, and an arbitrary amount of ice pieces C can be put into the water or aqueous solution in the water tank and floated. That is, the size and density of the ice pieces C spread on the water channel 2 can be arbitrarily adjusted even before or after the model ship 3 is inserted into the water channel 2. Further, ice pieces C having different sizes may be mixed.
なお、本実施形態において、「複数の氷片Ｃが敷き詰められた」とは、氷片干渉試験に必要な分量の氷を水路２内に浮遊させた状態を示すものであり、氷片Ｃ間に適度な隙間があってもよい趣旨である。 In the present embodiment, “a plurality of ice pieces C are spread” refers to a state in which an amount of ice necessary for the ice piece interference test is suspended in the water channel 2. The reason is that there may be an appropriate gap.
水路２の上方には移動機構４が配置されている。例えば、図２に示したように、移動機構４は、水路２の上方に掛け渡されたガイドレール４１と、ガイドレール４１上を走行する台車４２と、を備えている。台車４２は、駆動モータを備えた自走式であってもよいし、巻き取り可能なワイヤに接続された牽引式であってもよい。模型船３は、例えば、ロッド状の支持部材４３によって台車４２に固定される。 A moving mechanism 4 is disposed above the water channel 2. For example, as illustrated in FIG. 2, the moving mechanism 4 includes a guide rail 41 that extends over the water channel 2 and a carriage 42 that travels on the guide rail 41. The carriage 42 may be a self-propelled type provided with a drive motor, or may be a traction type connected to a wire that can be wound. The model ship 3 is fixed to the carriage 42 by a rod-shaped support member 43, for example.
模型船３は、例えば、図１に示したように、主として、船底３１の形状及び船底３１と推進器３２との位置関係を模擬したものである。図２に示したように、水路２の横幅Ｗを模型船３の横幅に近接させることにより、模型船３を水路２内で走行させたときに、氷片Ｃを模型船３の両サイドに逃がすことなく船底３１に沿って有効に移動させることができる。したがって、模型船３の全体の構造を簡略化することができる。 For example, as shown in FIG. 1, the model ship 3 mainly simulates the shape of the bottom 31 and the positional relationship between the bottom 31 and the propulsion device 32. As shown in FIG. 2, by bringing the width W of the water channel 2 close to the width of the model ship 3, the ice pieces C are placed on both sides of the model ship 3 when the model ship 3 travels in the water channel 2. It can be moved effectively along the bottom 31 without escaping. Therefore, the entire structure of the model ship 3 can be simplified.
具体的には、模型船３は、水路２に沿って配置される一対のフレーム部材３３と、フレーム部材３３を連結する複数の連結板３４と、船底３１及び推進器３２を連結板３４に接続する支持部材３５と、を備えている。推進器３２は、いわゆるポッド型推進器であり、支持部材３５によって支持された台座３６上に配置されたモータ３７に接続されている。なお、推進器３２は、ポッド型に限定されるものではなく、例えば、船尾部３１ｓから後方に延出されたシャフトにスクリュープロペラが配置された推進器であってもよい。 Specifically, the model ship 3 connects the pair of frame members 33 arranged along the water channel 2, a plurality of connection plates 34 that connect the frame members 33, the ship bottom 31 and the propulsion device 32 to the connection plate 34. And a supporting member 35. The propulsion unit 32 is a so-called pod type propulsion unit, and is connected to a motor 37 disposed on a pedestal 36 supported by a support member 35. The propulsion device 32 is not limited to a pod type, and may be, for example, a propulsion device in which a screw propeller is disposed on a shaft extending rearward from the stern portion 31s.
船底３１は、船首部３１ｂ、中央部３１ｃ及び船尾部３１ｓの三つの部分によって構成される。船首部３１ｂ、中央部３１ｃ及び船尾部３１ｓは、例えば、それぞれ矩形状の平板の板材により構成されており、船首部３１ｂ及び中央部３１ｃ、中央部３１ｃ及び船尾部３１ｓは、それぞれヒンジ３１ｈによって接続されている。 The ship bottom 31 is composed of three parts, a bow part 31b, a center part 31c, and a stern part 31s. The bow portion 31b, the central portion 31c, and the stern portion 31s are made of, for example, rectangular flat plate members, and the bow portion 31b and the central portion 31c, and the central portion 31c and the stern portion 31s are connected by hinges 31h, respectively. Has been.
したがって、船首部３１ｂ及び船尾部３１ｓは、中央部３１ｃに対して傾斜角度α，βを任意に調整することができるように構成されている。なお、中央部３１ｃを構成する板材は、略水平となるように支持部材３５に接続されている。 Therefore, the bow portion 31b and the stern portion 31s are configured so that the inclination angles α and β can be arbitrarily adjusted with respect to the center portion 31c. In addition, the board | plate material which comprises the center part 31c is connected to the support member 35 so that it may become substantially horizontal.
ここで、船首部３１ｂ及び船尾部３１ｓを構成する板材は、模擬する船舶の形状に応じて湾曲した板材によって構成してもよい。また、ヒンジ３１ｈを省略して、船首部３１ｂ、中央部３１ｃ及び船尾部３１ｓを一枚の板材により構成してもよい。この場合、船首部３１ｂ及び船尾部３１ｓの傾斜角度を変更したい場合には、船底３１を構成する板材の全部を異なる形状の板材に変更するようにすればよい。 Here, the plate material constituting the bow portion 31b and the stern portion 31s may be constituted by a curved plate material according to the shape of the ship to be simulated. Further, the hinge 31h may be omitted, and the bow 31b, the center 31c, and the stern 31s may be configured by a single plate material. In this case, when it is desired to change the inclination angles of the bow portion 31b and the stern portion 31s, all of the plate members constituting the ship bottom 31 may be changed to plate members having different shapes.
船首部３１ｂを構成する板材は、支持部材３５に軸継手３５ａを介して接続され、フレーム部材３３により支持されている。支持部材３５の長さを調整することにより、傾斜角度αを任意に調整することができる。傾斜角度αは、模擬する船舶の形状に応じて調整するようにしてもよいし、船底３１に沿って移動させたい氷片Ｃの分量に応じて調整するようにしてもよい。 The plate material constituting the bow portion 31 b is connected to the support member 35 via the shaft coupling 35 a and supported by the frame member 33. By adjusting the length of the support member 35, the inclination angle α can be arbitrarily adjusted. The inclination angle α may be adjusted according to the shape of the ship to be simulated, or may be adjusted according to the amount of ice pieces C that are to be moved along the ship bottom 31.
船尾部３１ｓを構成する板材も、支持部材３５に軸継手３５ａを介して接続され、フレーム部材３３により支持されている。支持部材３５の長さを調整することにより、傾斜角度βを任意に調整することができる。傾斜角度βは、模擬する船舶の形状に応じて調整するようにしてもよいし、推進器３２に干渉させたい氷片Ｃの分量に応じて調整するようにしてもよい。 The plate material constituting the stern portion 31 s is also connected to the support member 35 via the shaft coupling 35 a and supported by the frame member 33. The inclination angle β can be arbitrarily adjusted by adjusting the length of the support member 35. The inclination angle β may be adjusted according to the shape of the ship to be simulated, or may be adjusted according to the amount of ice pieces C that are desired to interfere with the propulsion device 32.
なお、船尾部３１ｓの傾斜角度βを調整すると、船尾部３１ｓの後端部（エッジ部）と推進器３２との相対的な位置関係が崩れてしまうことから、この位置関係が氷片Ｃの流れに影響を与える場合には、傾斜角度βに応じて船尾部３１ｓを構成する板材の長さを変更する（板材を付け替える）ようにしてもよい。このとき、船尾部３１ｓの後端部（エッジ部）の位置に応じて推進器３２の位置も変更することが好ましい。 When the inclination angle β of the stern portion 31s is adjusted, the relative positional relationship between the rear end portion (edge portion) of the stern portion 31s and the propulsion device 32 is destroyed. When the flow is affected, the length of the plate material constituting the stern portion 31s may be changed (the plate material is changed) according to the inclination angle β. At this time, it is preferable that the position of the propulsion device 32 is also changed according to the position of the rear end portion (edge portion) of the stern portion 31s.
ここで、図３は、模型船の船尾部の傾斜角度を変更した状態を示す側面図である。また、図４は、模型船の船首部の傾斜角度を変更した状態を示す側面図である。 Here, FIG. 3 is a side view showing a state in which the inclination angle of the stern portion of the model ship is changed. FIG. 4 is a side view showing a state in which the inclination angle of the bow of the model ship is changed.
図３に示した模型船３は、図１に示した模型船３よりも船尾部３１ｓの傾斜角度βを大きく調整したものである。また、船尾部３１ｓを構成する板材については、図１に示した板材よりも前後方向の長さが短いものに付け替えている。さらに、推進器３２については、船尾部３１ｓの後端部（エッジ部）に接近した位置に配置を変更してある。 The model ship 3 shown in FIG. 3 is obtained by adjusting the inclination angle β of the stern portion 31s to be larger than that of the model ship 3 shown in FIG. Moreover, about the board | plate material which comprises the stern part 31s, it replaces with the thing whose length of the front-back direction is shorter than the board | plate material shown in FIG. Furthermore, about the propulsion device 32, arrangement | positioning is changed to the position which approached the rear-end part (edge part) of stern part 31s.
図４に示した模型船３は、図１に示した模型船３よりも船首部３１ｂの傾斜角度αを大きく調整したものである。なお、船首部３１ｂの傾斜角度αを小さく調整した場合に、船首部３１ｂの先端部（エッジ部）が喫水に近くなってしまう場合には、氷片Ｃや水が模型船３内に流れ込んでしまう分量が多くなってしまうことから、図１に示した板材よりも前後方向の長さが長いものに付け替えるようにしてもよい。 The model ship 3 shown in FIG. 4 is obtained by adjusting the inclination angle α of the bow 31b to be larger than that of the model ship 3 shown in FIG. In addition, when the inclination angle α of the bow portion 31b is adjusted to be small, if the tip portion (edge portion) of the bow portion 31b becomes close to the draft, the ice pieces C and water flow into the model ship 3. Since the amount to be stored increases, it may be replaced with one having a longer length in the front-rear direction than the plate shown in FIG.
次に、上述した氷片干渉試験設備１を用いた船舶の氷片干渉試験方法について説明する。まず、水路２内に水又は水溶液を供給し、調整部材を配置する等して横幅Ｗをもつ水路２を構成した後、所定の大きさの氷片Ｃを所定の密度となるまで水路２内に供給する。次いで、船底３１の形状（船首部３１ｂの傾斜角度α、船尾部３１ｓの傾斜角度β等）を調整し、推進器３２の位置を調整する。なお、氷片Ｃの供給工程及び模型船３の調整工程は、順序を入れ替えてもよい。 Next, a ship ice piece interference test method using the above-described ice piece interference test facility 1 will be described. First, water or an aqueous solution is supplied into the water channel 2 and a water channel 2 having a lateral width W is configured by arranging an adjustment member, etc., and then ice pieces C having a predetermined size are stored in the water channel 2 until a predetermined density is reached. To supply. Next, the shape of the ship bottom 31 (the inclination angle α of the bow portion 31b, the inclination angle β of the stern portion 31s, etc.) is adjusted, and the position of the propulsion device 32 is adjusted. Note that the order of supplying the ice pieces C and the adjusting process of the model ship 3 may be interchanged.
続いて、模型船３を水路２に投入し、移動機構４に模型船３を接続する。その後、推進器３２のスクリュープロペラを所定の回転数で回転させた状態で、所定の速度で台車４２を走行させることにより、模型船３を図のＸ方向に移動させる。 Subsequently, the model ship 3 is thrown into the water channel 2, and the model ship 3 is connected to the moving mechanism 4. Thereafter, the model ship 3 is moved in the X direction in the figure by running the carriage 42 at a predetermined speed in a state where the screw propeller of the propulsion device 32 is rotated at a predetermined rotation speed.
水路２に敷き詰められた氷片Ｃは、模型船３の移動に伴って船底３１に流れ込み、船底３１に沿って相対的に後方に移動し、氷片Ｃのいくつかは推進器３２のスクリュープロペラと干渉し、氷片Ｃのいくつかは推進器３２のスクリュープロペラと干渉することなく後方へ流れる。 The ice pieces C spread in the water channel 2 flow into the ship bottom 31 as the model ship 3 moves, and move relatively rearward along the ship bottom 31, and some of the ice pieces C are screw propellers of the propulsion device 32. And some of the ice pieces C flow backward without interfering with the screw propeller of the propeller 32.
このとき、推進器３２の推力やトルクの変動、推進器３２のポッド部やスクリュープロペラに発生した歪等を計測することにより、推進器３２への氷片Ｃの干渉による影響を評価することができる。例えば、水路２に氷片Ｃを敷き詰めた状態と氷片Ｃを投入していない状態とにおいて、模型船３を同一の推力及び速度で移動させて計測した結果を比較することにより、氷片Ｃの干渉の有無による影響を容易に評価することができる。 At this time, the influence of the interference of the ice piece C on the propulsion device 32 can be evaluated by measuring the thrust and torque fluctuations of the propulsion device 32, the distortion generated in the pod portion of the propulsion device 32 and the screw propeller, and the like. it can. For example, by comparing the measurement results obtained by moving the model ship 3 with the same thrust and speed in the state where the ice pieces C are spread over the water channel 2 and the state where the ice pieces C are not charged, the ice pieces C The influence of the presence or absence of interference can be easily evaluated.
また、氷片Ｃの大きさや密度を変えて同様の干渉試験を繰り返すことにより、氷海を航行する船舶の種々の状況に応じた評価結果を得ることができる。また、船首部３１ｂの傾斜角度αや船尾部３１ｓの傾斜角度βを任意に調整して同様の干渉試験を繰り返すことにより、船体形状による氷片干渉の影響を容易に評価することができる。 In addition, by repeating the same interference test while changing the size and density of the ice pieces C, it is possible to obtain evaluation results corresponding to various situations of the ship navigating the ice sea. Further, by repeating the same interference test by arbitrarily adjusting the inclination angle α of the bow portion 31b and the inclination angle β of the stern portion 31s, the influence of ice piece interference due to the hull shape can be easily evaluated.
本発明は、上述した実施形態に限定されず、船舶が後退する場合を模擬する場合には模型船３を反対方向に移動させて干渉試験を行ってもよい等、本発明の趣旨を逸脱しない範囲で種々変更が可能であることは勿論である。 The present invention is not limited to the above-described embodiment, and when simulating the case where the ship moves backward, the model ship 3 may be moved in the opposite direction, and an interference test may be performed. Of course, various changes can be made within the range.
１ 氷片干渉試験設備
２ 水路
３ 模型船
４ 移動機構
３１ 船底
３１ｂ 船首部
３１ｃ 中央部
３１ｈ ヒンジ
３１ｓ 船尾部
３２ 推進器
３３ フレーム部材
３４ 連結板
３５ 支持部材
３５ａ 軸継手
３６ 台座
３７ モータ
４１ ガイドレール
４２ 台車
４３ 支持部材
DESCRIPTION OF SYMBOLS 1 Ice piece interference test equipment 2 Water channel 3 Model ship 4 Moving mechanism 31 Ship bottom 31b Bow 31c Center part 31h Hinge 31s Stern 32 Propeller 33 Frame member 34 Connecting plate 35 Support member 35a Shaft coupling 36 Base 37 Motor 41 Guide rail 42 Dolly 43 Support member
Claims (4)
ことを特徴とする船舶の氷片干渉試験方法。 A model ship equipped with a propulsion device at the rear of the stern part and a model ship equipped with a propulsion device at the back of the stern part was introduced into a water channel in which a plurality of ice pieces were spread, and the model ship was attached to the ice piece. When the interference test of the ice piece with respect to the propeller is performed, the interference test is performed by adjusting the inclination angle of the stern part or the bow part.
A ship ice piece interference test method.
少なくとも船首部から船尾部までの船底を模擬するとともに前記船尾部の後方に推進器を備えた模型船と、
前記模型船を前記水路内で前記氷片に対して相対的に移動させる移動機構と、を備え、
前記模型船は、前記船尾部又は前記船首部の傾斜角度が調整可能に構成されている、
ことを特徴とする船舶の氷片干渉試験設備。 A waterway filled with ice pieces,
A model ship that simulates at least the ship bottom from the bow to the stern and has a propeller behind the stern,
E Bei and a moving mechanism for relatively moving with respect to the ice pieces in the water channel the model ship,
The model ship is configured such that an inclination angle of the stern part or the bow part is adjustable.
Ship ice piece interference test facility.
The ship ice piece interference test facility according to claim 3 , wherein the water channel is configured such that a lateral width thereof is adjustable in accordance with a lateral width of the model ship.
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