土木学会論文集B3（海洋開発）, Vol. 78, No. 2, I_265‐I_270, 2022.

ࢫࣃ࣮ᆺᾋయ᭥⯟᫬ࡢືᦂ≉ᛶ࡟㛵ࡍࡿ◊✲ᑠᯘ ᣅ☻1࣭す⏿ ๛2࣭ᘅ஭ ᗣఙ3࣭ಖᮌᮏ ᬛྐ41 ṇ఍ဨ ஬ὒᘓタ㸦ᰴ㸧ᢏ⾡◊✲ᡤ㸦ࠛ329-2746 ᰣᮌ┴㑣㡲ሷཎᕷᅄ༊⏫ 1534-1㸧

E-mail: takuma.kobayashi@mail.penta-ocean.co.jp (Corresponding Author)
2 ṇ఍ဨ ஬ὒᘓタ㸦ᰴ㸧ᢏ⾡◊✲ᡤ㸦ࠛ329-2746 ᰣᮌ┴㑣㡲ሷཎᕷᅄ༊⏫ 1534-1㸧

E-mail: takeshi.nishihata@mail.penta-ocean.co.jp
3 ஬ὒᘓタ㸦ᰴ㸧⯪⯧ᶵᲔ㒊㸦ࠛ112-8576 ᮾி㒔ᩥி༊ᚋᴦ 2-2-8㸧

E-mail: Yasunobu.Hiroi@mail.penta-ocean.co.jp
4 ṇ఍ဨ ஬ὒᘓタ㸦ᰴ㸧ὒୖ㢼ຊ஦ᴗᮏ㒊㸦ࠛ112-8576 ᮾி㒔ᩥி༊ᚋᴦ 2-2-8㸧

E-mail: Satoshi.Hokimoto@mail.penta-ocean.co.jp

ᾋయᘧࢫࣃ࣮ᆺὒୖ㢼㌴᪋ᕤ࡛ࡢࢫࣃ࣮ᆺᾋయ᭥⯟࡟࠾࠸࡚㸪ᶓἼస⏝᫬࡞ࡽࡧ࡟ᅇ㢌᫬ࡢືᦂ≉ᛶࢆᢕᥱࡍࡿࡓࡵࡢỈ⌮ᶍᆺᐇ㦂ࢆ⾜ࡗࡓ㸬ᶓἼస⏝ୗࡢ᭥⯟࡛ࡣ㸪Ἴ࿘ᮇࡸ᭥⯟㏿ᗘࡀቑຍࡍࡿ࡟ࡘࢀ
࡚ Roll ᪉ྥࡢືᦂ㔞ࡀቑຍࡍࡿഴྥࢆ☜ㄆࡋࡓ㸬ᅇ㢌᭥⯟ᐇ㦂࡛ࡣ㸪᭥⯟㏿ᗘ࡟ᑐࡋ࡚ᅇ㢌༙ᚄࡀᑠࡉ࠸ሙྜ࡟㐲ᚰຊ࡟ࡼࡗ࡚ࢫࣃ࣮ࡀእഃ࡟኱ࡁࡃ Rolling ࡍࡿ⌧㇟ࢆ☜ㄆࡋ㸪᪋ᕤ᫬࡟࠾ࡅࡿ᭥⯟㏿ᗘ࡜ᅇ㢌༙ᚄ࡟ࡼࡿືᦂ㔞ࡢホ౯ࢆ⾜ࡗࡓ㸬ࡲࡓ㸪⿵ຓ᭥⯪ࡢ᭷↓࡟ࡼࡿ㐪࠸࡟╔┠ࡋ㸪⿵ຓ᭥⯪ࡀ࡞࠸ࢣ࣮ࢫ࡟࠾࠸࡚ࡣ㸪Ἴ࿘ᮇࡀᑠࡉࡃ࡞ࡿ࡜Ἴ⁻ὶຊࡀ኱ࡁࡃ࡞ࡿࡓࡵ㸪ᅇ㢌࡛ࡁ࡞࠸⌧㇟ࢆ☜ㄆ࡛ࡁࡓ㸬ࡑࡢࡓࡵ㸪ᅇ㢌᭥⯟᪋ᕤ࡟࠾ࡅࡿ⿵ຓ᭥⯪ࡢᚲせᛶࢆ☜ㄆࡋࡓ㸬

Key Words : offshore wind turbine, transverse waves, turning towing, auxiliary tug, turning radius

1. ࡣࡌࡵ࡟ࡿࡀ㸪୺᭥⯪ࡢࡳ࡟ࡼࡿ᭥⯟ᐇ㦂ࢆ⾜ࡗ࡚࠾ࡾ㸪⿵ຓ᭥⯪ࡢ෌⌧ࡣ⾜ࡗ࡚࠸࡞࠸㸬ࡑࡢࡓࡵ㸪ᐇ᪋ᕤࢆ᝿ᐃࡋ㸪⿵ຓ᭥⯪ࡶᶍᨃࡋࡓᐇ㦂ࢆ⾜࠺ᚲせࡀ࠶ࡿ㸬㏆ᖺ㸪᭷ᮃ࡞෌⏕ྍ⬟࢚ࢿࣝࢠ࣮ࡢ୍ࡘ࡜ࡋ࡚㸪ὒୖ㢼ຊⓎ㟁ࡀὀ┠ࡉࢀ࡚࠸ࡿ㸬୰࡛ࡶ㸪ᾋయᘧὒୖ㢼ຊⓎࡑࡇ࡛㸪ᮏ◊✲࡛ࡣ㸪ᶓἼస⏝᫬࡞ࡽࡧ࡟ᅇ㢌᫬ࡢ᭥㟁ࡣ㸪╔ᗋᘧὒୖ㢼ຊⓎ㟁࡟ẚ࡭࡚࢚ࢿࣝࢠ࣮ࡢ㈿Ꮡ㔞⯟ᐇ㦂ࢆ⾜࠸㸪ࢫࣃ࣮ᆺᾋయỈᖹ᭥⯟᫬ࡢືᦂ≉ᛶࢆᢳࡀ኱ࡁ࠸ 1)ࡓࡵ㸪ࡑࡢᑟධࡀᮇᚅࡉࢀ࡚࠸ࡿ㸬ࡑࡢࡓࡵ㸪ฟࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࡓ㸬┤⥺᭥⯟ᐇ㦂࡟࠾࠸࡚ࡣ㸪Ἴᾋయᘧὒୖ㢼㌴᪋ᕤ᫬ࡢ᳨ウࢆ⾜࠺ࡇ࡜ࡣ㔜せ࡛࠶ࡿ࡜ࢆ㐍⾜᪉ྥࡢ┿ᶓ࠿ࡽస⏝ࡋ㸪Ἴ࿘ᮇ࡜᭥⯟㏿ᗘࢆኚ࠼࠸࠼ࡿ㸬౛࠼ࡤ㸪෗┿-1 ࡢࡼ࠺࡞ᾋయᘧࢫࣃ࣮ᆺὒୖ㢼ࡓᐇ㦂ࢆᐇ᪋ࡋࡓ㸬ᅇ㢌᭥⯟࡛ࡣ㸪Ἴ࿘ᮇ࡜᭥⯟㏿ᗘ࡟㌴ࡢ᪋ᕤ㐣⛬࡟࠾࠸࡚ࡣ㸪ᾋయ〇సሙᡤ࠿ࡽእὒࡢ Windຍ࠼࡚㸪ᅇ㢌༙ᚄࢆኚ໬ࡉࡏࡓᐇ㦂ࢆ⾜࠸㸪Ᏻ඲࡟ᅇ㢌Farm㸦WF㸧ᾏᇦࡲ࡛ࡢ㛫ࢫࣃ࣮ᆺᾋయࢆ᭥⯟ࡋ㸪WF ᾏ࡛ࡁࡿᅇ㢌༙ᚄ࡜᭥⯟㏿ᗘࡢ㛵ಀ࡟ࡘ࠸࡚ホ౯ࡋࡓ㸬ࡲᇦ࡛ὀỈ࡟ࡼࡿ❧࡚㉳ࡇࡋࢆ⾜ࡗࡓᚋ࡟㸪㢼㌴ࢆᦚ㍕ࡍࡓ㸪⿵ຓ᭥⯪ࡀ࡞࠸ࢣ࣮ࢫ࡛ࡢᅇ㢌ᐇ㦂ࡶ⾜࠸㸪ᐇ᪋ᕤࡿ᪋ᕤ᪉ἲࡀ࠶ࡿ㸬ᕴࡽࡣࢫࣃ࣮ࡢὀ᤼Ỉ࡟ࡼࡿ❧࡚㉳ୖ࡟࠾ࡅࡿ⿵ຓ᭥⯪ࡢᚲせᛶ࡟ࡘ࠸࡚ࡶ᳨ウࡋࡓ㸬ࡇࡋ࡜ᶓಽࡋ᫬ࡢᣲື࡟㛵ࡍࡿỈᵴᐇ㦂࡜ゎᯒࢆᐇ᪋ࡋ2)㸪すᮧࡽࡣ㉳㔜ᶵ⯪࡟ࡼࡿ㢼㌴࣮ࣟࢱ᥋ྜ᫬ࢆᑐ㇟࡜ࡋ

ࡓືᦂゎᯒࢆ⾜࠸㸪᪋ᕤ✌ാ⋡ࢆ᳨ウࡋࡓ 3)㸬ࡇࡢࡼ࠺࡟ᾋయᘧὒୖ㢼㌴᪋ᕤ᫬ࡢᵝࠎ࡞᳨ウࡣ⾜ࢃࢀ࡚࠸ࡿࡶ
ࡢࡢ㸪ࢫࣃ࣮᭥⯟᫬ࡢືᦂ≉ᛶ࡟㛵ࡍࡿ◊✲ࡣᐇ᪋ࡉࢀ㢼㌴

࡚࠸࡞࠸㸬ࢫࣃ࣮ᆺᾋయࡢỈᖹ᭥⯟ࡍࡿ㝿ࡣ㸪ᶓἼࢆཷ䝇䝟䞊ࡅࡓሙྜ㸪ᾋయࡢ Rolling ࡀᠱᛕࡉࢀࡿࡇ࡜࡟ຍ࠼࡚㸪ෆࡸ༙ᓥ㎽ᅇ᫬࡞࡝ࡢᅇ㢌࡟࠾࠸࡚ࡣ㸪ᵝࠎ࡞᪉ྥ࠿ࡽ
෗┿-1 ࢫࣃ࣮ᆺᾋయᘧὒୖ㢼㌴ࡢ࢖࣓࣮ࢪ㸦ᕥ㸧࡜ࢫࣃ࣮ᆺἼࡢᙳ㡪ࢆཷࡅ࡞ࡀࡽ㸪Ᏻ඲࡟㌿ᅇ࡛ࡁࡿᅇ㢌༙ᚄ࡜᭥ᾋయࡢỈᖹ᭥⯟ࡢᵝᏊ㸦ྑ㸧⯟㏿ᗘࢆ᫂ࡽ࠿࡟ࡍࡿᚲせࡀ࠶ࡿ㸬᪤ ࡢ᭥⯟࡟㛵ࡍࡿ4)㸦https://www.saipem.com/en/projects/hywind?referral=%2Fen%2Fprojects㸧5)◊✲ࡣ㸪Ᏻ㔝ࡽ ࡸ㐨๓ࡽ ࡀỈ⌮ᶍᆺᐇ㦂ࢆᐇ᪋ࡋ࡚࠸

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土木学会論文集B3（海洋開発）, Vol. 78, No. 2, I_265‐I_270, 2022.

2. Ỉ⌮ᶍᆺᐇ㦂ࡢᴫせ120 Hz ࡢ᫬㛫㛫㝸࡛ィ ࡋࡓ㸬ࡲࡓ㸪᭥⯟࣮ࣟࣉࡣᾋయ
ഃࡢ๓ᚋ 2 Ⅼࡎࡘ࡟᥋⥆ࡋ㸪୺᭥⯪ഃࡣ Y Ꮠಀ␃㸪⿵ຓᐇ㦂ࡣᖹ㠃Ỉᵴ㸦L=30 m, B=20 m, H=1.0 m㸧ࢆ⏝࠸࡚㸪᭥⯪ഃࡣ V Ꮠ࡛ಀ␃ࡋ࡚࠾ࡾ㸪ࡑࢀࡒࢀࡢ᥋⥆Ⅼ࡟ᙇຊࣇ࣮ࣝࢻࡢ┦ఝ๎࡟ᇶ࡙ࡃ 1/50 ࢫࢣ࣮࡛ࣝᐇ᪋ࡋࡓ㸬᭥ィࢆィ 5 Ⅼタ⨨ࡋ㸪᭥⯟࣮ࣟࣉ࡟స⏝ࡍࡿᙇຊࡶ ᐃࡋ⯟ࡣ㸪Ỉ୰࡟ᩜタࡋࡓ࣮ࣞࣝ࡟ἢࡗ࡚ྎ㌴ࢆ୍ᐃ㏿ᗘ࡛ࡓ㸬ࡇࡢࡼ࠺࡞ᐇ㦂⿦⨨ࢆ⏝࠸࡚㸪᭥⯪ࡢἼᾉ᮲௳ࡸ᭥⯟⾜࣭ᅇ㢌ࡉࡏࡿ㸬Ỉ୰ࡢྎ㌴࠿ࡽẼ୰࡟ᨭᰕࢆᙇࡾฟ⯟㏿ᗘ㸪ᅇ㢌༙ᚄࡢ㐪࠸࡟ࡼࡿࢫࣃ࣮ᆺᾋయࡢᣲືࡢኚࡋ㸪ࢫࣃ࣮ᆺᾋయ࡜᭥⯟࣮ࣟࣉ࡛㐃⤖ࡍࡿࡇ࡜࡛୺᭥⯪໬࡟ࡘ࠸᳨࡚ウࢆ⾜ࡗࡓ㸬ືᦂ㔞ࡣ㸪᭥⯟㛤ጞ࠿ࡽ೵Ṇ࠾ࡼࡧ⿵ຓ᭥⯪ࡢ≌ᘬ㸪ಀ␃ࢆᶍᨃࡍࡿ㸦෗┿-2㸧㸬ᾋయࡲ࡛ࡢ㛫࡟࠾ࡅࡿ⤯ᑐ್ࡢ᭱኱್ࢆᢳฟࡋࡓ㸬࡞࠾㸪ᗙ࡞ࡽࡧ࡟᭥⯟࣮ࣟࣉ࡟㛵ࡍࡿㅖඖࢆ⾲-1 ࡟㸪Ỉ῝ࡸἼᾉᶆ⣔ࡣ㸪ᾋయ୰ᚰ㒊ศࢆཎⅬ࡜ࡋࡓྑᡭᗙᶆ⣔࡜ࡋ㸪ᐇ᮲௳࡞࡝ࡢᐇ㦂᮲௳ࢆ⾲-2 ࡟♧ࡍ㸬ධᑕἼࡣつ๎Ἴ࡛㸪㦂⤖ᯝࡣ㸪⌧ᆅࢫࢣ࣮ࣝ࡟᥮⟬ࡋࡓᩘ್ࢆ♧ࡍ㸬Ἴ㧗 1.5 m ࡜ࡋ㸪Ἴ࿘ᮇࡣ㸪ࢫࣃ࣮ࡢᅛ᭷࿘ᮇ௜㏆㸦Pitch㸸

3. ᐇ㦂⤖ᯝ

6.0 s㸧࡟ᑐࡍࡿᛂ⟅ᛶࢆᢕᥱࡍࡿࡓࡵ࡟㸪5.0㹼9.0 s ࡢ⠊ᅖࢆ 1.0 s 㛫㝸࡛タᐃࡋࡓ㸬ຍ࠼࡚㸪᭥⯟㏿ᗘࡢࡳࡢᙳ㡪(1) ┤⥺᭥⯟ᐇ㦂⤖ᯝࡶホ౯ࡍࡿࡓࡵ㸪㐀Ἴ࡞ࡋࡢࢣ࣮ࢫࡶᐇ᪋ࡋࡓ㸬⯟㊰䛿┤⥺᭥⯟ᐇ㦂࡟࠾ࡅࡿ Rolling ࡜ Pitching ࢆᅗ-2 ࡟♧ᅗ-1䛷♧䛩㏻䜚䠈┤⥺᭥⯟䛸ᅇ㢌᭥⯟䛾2 䜿䞊䝇タᐃ䛧䛯䠊┤⥺᭥⯟䛷䛿䠈䝇䝟䞊䛾㐍⾜᪉ྥ䛻ᑐ䛧䛶ᶓ䛛䜙Ἴ䜢స⏝⾲-1 ᾋయ࡞ࡽࡧ࡟᭥⯟࣮ࣟࣉࡢㅖඖ㸦⌧ᆅࢫࢣ࣮ࣝ㸧䛥䛫䛯䠊ᅇ㢌᭥⯟䛿䠈䝇䝟䞊㛗 R 䜢䝟䝷䝯䞊䝍䛸䛧䛯ᅇ㢌༙ᚄ 2R 䛸 3R 䛻ຍ䛘䠈⿵ຓ᭥⯪䛒䜚䛸䛺䛧䛾䜿䞊䝇䛷ᐇ㦂䜢㛗ࡉ L130 m⾜䛳䛯䠊᭥⯟䛿㐀Ἴ㛤ጞ䛛䜙䛒䜛⛬ᗘ᫬㛫䛜⤒㐣䛧䛶䠈㐀┤ᚄ Φ

16.5 mᖹᆒႚỈ d3.2 m

᤼Ỉ㔜㔞 W

3396.6 tfἼ䛜ᐃᖖ≧ែ䛻㐩䛧䛯ᚋ䛻㛤ጞ䛧䛯䠊䝇䝟䞊䛾 Rolling䠈
Pitching 䛾ືᦂ㔞䛿㸪Nobby Tech ♫〇ࡢ 3 ḟඖࣜ࢔ࣝࢱ
࢖࣒࣮ࣔࢩࣙࣥィ ࢩࢫࢸ࣒㸦VENUS3D R㸧ࢆ⏝࠸࡚᭥⯟࣮ࣟࣉ㛗ࡉᙀя୻ᑔᲢ̞သˮፗᲣ

40 m㸦⿵ຓ᭥⯪㛫㸧

⾲-2 ᐇ㦂᮲௳㸦⌧ᆅࢫࢣ࣮ࣝ᥮⟬㸧ɼ୻ᑔᲢཏࡽˮፗᲣ
;‫̞܌‬သ

8‫̞܌‬သ

Ỉ῝㸦m㸧

40 m

Ἴ㧗㸦m㸧

1.5 m

࿘ᮇ㸦sec㸧Ἴ࡞ࡋ㸪5.0㸪6.0㸪7.0㸪8.0㸪9.0㸦つ๎Ἴ㸧᭥⯟㏿ᗘǹȑȸ‫˳ූ׹‬㸦knot㸧

෗┿-2 ᐇ㦂ᴫἣ㸦a㸧┤⥺᭥⯟ࢣ࣮ࢫ        

100 m㸦୺᭥⯪㛫㸧

1.5㸪3.0㸪5.0 㸦ͤ1knotҸ0.5 m/s㸧ᅇ㢌༙ᚄ

2R㸪3R 㸦ͤR ࡣࢫࣃ࣮ࡢ㛗ࡉ㸧⿵ຓ᭥⯪࠶ࡾ㸪࡞ࡋ㸦ᅇ㢌᭥⯟ࡢࡳ㸧         㸦b㸧ᅇ㢌᭥⯟ࢣ࣮ࢫ

ᅗ-1 ᐇ㦂ᖹ㠃ᅗ㸦༢఩㸸mm㸧

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土木学会論文集B3（海洋開発）, Vol. 78, No. 2, I_265‐I_270, 2022.
1.5kt

3.0kt

5.0kt

1.5kt

2.0

3.0kt

5.0kt

1.5

10Pitching䠄deg䠅

Rolling䠄deg䠅

15

500

2

4

68

1.0
0.5
0.0

100

24࿘ᮇ䠄s䠅

6810࿘ᮇ䠄s䠅

15䠇䠖ᓊ᪉ྥ䜈䛾ᅇ㌿

Roll䠄deg䠅

1050240270300

330

360

390

450

420-5䠉䠖Ἀ᪉ྥ䜈䛾ᅇ㌿-10䝟䝽䞊䝇䝨䜽䝖䝹ᐦᗘ䠄deg²䞉s䠅ᅗ-2 ┤⥺᭥⯟᫬ࡢືᦂ㔞㸦ᕥ㸸Rolling㸪ྑ㸸Pitching㸧

Tp=106.3s

1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.10᫬㛫䠄s䠅

0

0.02

0.04

0.06

0.08

0.1

࿘Ἴᩘf䠄Hz䠅ᅗ-3 ┤⥺᭥⯟᫬㸦᭥⯟㏿ᗘ 5.0 knot㸪Ἴ࿘ᮇ 9 s㸧ࡢ Rolling ࡢ᫬⣔ิ㸦ᕥ㸧࡞ࡽࡧ࡟ Rolling ࡢࣃ࣮࣡ࢫ࣌ࢡࢺࣝᐦᗘ㸦ྑ㸧ࡍ㸬ࡲࡎ㸪Rolling ࡟╔┠ࡍࡿ࡜㸪Ἴ࿘ᮇࡀ㛗ࡃ࡞ࡿ࡜ࡼࡗ࡚ Rolling ࡀ኱ࡁࡃ࡞ࡗ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬≉࡟㸪

Rolling ࡀ኱ࡁࡃ࡞ࡿഴྥ࡟࠶ࡗࡓ㸬ࡇࡇ࡛㸪୍౛࡜ࡋ࡚㸪ᅇ㢌༙ᚄ 2R㸪᭥⯟㏿ᗘ 5.0 knot ࡢࢣ࣮ࢫ࡟࠾࠸࡚ࡣ㸪㐀᭥⯟㏿ᗘ 5.0 knot㸪࿘ᮇ 9 s ࡢࢣ࣮ࢫ࡟࠾ࡅࡿ Rolling ࡢἼࡢᙳ㡪࡟ࡼࡽࡎ㸪ࢫࣃ࣮ࡀ෇࿘⯟㊰ࡢእഃ࡟ྥ࠿ࡗ࡚㸪᫬⣔ิືᦂ㔞࡞ࡽࡧ࡟ࢫ࣌ࢡࢺࣝゎᯒ⤖ᯝࢆᅗ-3 ࡟♧ࡍ㸬 ⣙ 90r኱ࡁࡃഴᩳࡍࡿᵝᏊࡀ☜ㄆࡉࢀࡓ㸬ࡇࢀࡣ㸪ᅇ㢌ྠᅗ࠿ࡽࢫࣃ࣮ࡣἼ࿘ᮇࡼࡾࡶ㛗࿘ᮇࡢ 106 s ⛬ᗘ࡛ື༙ᚄ࡟ᑐࡍࡿ᭥⯟㏿ᗘࡀ኱ࡁ࠸ࡓࡵ㸪እഃ࡟ྥ࠿ࡗ࡚ᾋ

ᦂࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬ࢫࣃ࣮ᆺᾋయࡢಀ␃⣔ࢆྵࡵయࢆᅇ㌿ࡉࡏࡿ኱ࡁ࡞㐲ᚰຊࡀస⏝ࡋࡓࡇ࡜࡟㉳ᅉࡍࡿࡓ⮬⏤ືᦂヨ㦂ࡼࡾ㸪๓ᚋࡢ᭥⯪࡛ಀ␃ࡉࢀࡓࢫࣃ࣮ࡢ࡜⪃࠼ࡽࢀࡿ㸬ࡇࡢࡼ࠺࡞ Roll ᪉ྥࡢ኱ഴᩳ࡟ࡼࡗ࡚㸪ᅛ᭷࿘ᮇࡣ㸪⣙ 100 s ࡛࠶ࡗࡓ㸬ࡇࡢ⤖ᯝࢆ㋃ࡲ࠼ࡿ࡜㸪᭥⯟࣮ࣟࣉࢆྲྀ௜ࡅࡿ἞ල࡟኱ࡁ࡞Ⲵ㔜ࡀస⏝ࡍࡿᜍࢀἼ࡟ࡼࡿືᦂࡼࡾࡶಀ␃⣔ࡢᙳ㡪ࡀ༟㉺ࡋ࡚࠸ࡓ࡜⪃࠼ࡀ࠶ࡿ㸬ࡋ࠿ࡋ㸪ࡑࡢ୍᪉࡛㸪᭥⯟㏿ᗘ 5 knot ࡛ࡶ㸪ᅇࡽࢀࡿ㸬࡞࠾㸪ࡑࡢ௚ࡢࢣ࣮ࢫ࡟࠾࠸࡚ࡶ㸪80 s㹼100 s ⛬㢌༙ᚄࢆ 3R ࡲ࡛኱ࡁࡃࡍࡿࡇ࡜࡛㸪Rolling ࡢ᭱኱್ࡀᗘ࡛ືᦂࡋ࡚࠾ࡾ㸪ྠᵝࡢഴྥࡀ☜ㄆࡉࢀࡓ㸬

20r⛬ᗘࡲ࡛పୗࡋ࡚࠸ࡿ㸬ࡇࢀ࡟ࡼࡾ㸪ᅇ㢌༙ᚄࡀ
Rolling ࡟୚࠼ࡿᙳ㡪ࡣ኱ࡁࡃ㸪 ෆࡸ༙ᓥ㎽ᅇ᫬࡞࡝ࡢ

ࡇࡢࡼ࠺࡟㸪ಀ␃⣔࡟ࡼࡿ㛗࿘ᮇࡢືᦂ≉ᛶࢆ᭷ࡍࡿ
ࡓࡵ㸪ࡼࡾ࿘ᮇࡢ㛗࠸Ἴ࿘ᮇ࡟ᑐࡍࡿᛂ⟅ᛶࡀ㧗ࡃ࡞ࡗᅇ㢌᪋ᕤࢆᏳ඲࡟ᐇ᪋ࡍࡿࡓࡵ࡟ࡣ㸪༑ศ࡞ᅇ㢌༙ᚄࢆࡓࡇ࡜ࡀ⪃࠼ࡽࢀࡿ㸬ࡇࡢࡼ࠺࡟㸪᭥⯟᫬࡟ᶓἼࢆཷࡅ

☜ಖࡍࡿᚲせᛶࡀ࠶ࡿ࡜ゝ࠼ࡿ㸬ࡲࡓ㸪Ἴ࿘ᮇ࡟ࡼࡿື

ࡿሙྜࡣ㸪࠺ࡡࡾ࡞࡝ࡢ࿘ᮇࡢ㛗࠸Ἴ࡟ࡼࡿ Rolling ࡢቑᦂ㔞ࡢ㐪࠸࡟╔┠ࡍࡿ࡜㸪┤⥺᭥⯟᫬࡜ࡣ␗࡞ࡾ㸪ࡼࡾຍࡀᠱᛕࡉࢀࡿ㸬ࡑࡢࡓࡵ㸪ᐇ᪋ᕤ᫬࡟ࡣ࠺ࡡࡾ࡞࡝ࡢ

▷࠸࿘ᮇ࡛ືᦂ㔞ࡀ኱ࡁࡃ࡞ࡗ࡚࠸ࡿ㸬Rolling ࡢⓎ⏕≧ᾏ㇟᮲௳ࢆὀどࡍࡿᚲせࡀ࠶ࡿ㸬⥆࠸࡚㸪Pitching ࡟ὀ┠ἣ㸦෗┿-3㸧ࡼࡾ㸪ᾋయࡣἈഃ࡟ᅇ㌿ࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡍࡿ࡜㸪ྛ᭥⯟㏿ᗘ࡟࠾࠸࡚㸪࿘ᮇ 6 s ࡛᭱ࡶືᦂ㔞ࡀ኱ࡿ㸬ࡇࡇ࡛㸪࿘ᮇ 5 s ࡢἼ㛗 λ=39.0 m ࡟ᑐࡍࡿᾋయᖜࡁࡃ࡞ࡗ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬ࡇࡇ࡛ࢫࣃ࣮ࡢPitching ࡢ

B=16.5 m ࡢẚࡀ 2.0 ࡟㏆࠸㸦2.4 ⛬ᗘ㸧ࡓࡵ㸪Ἴ㛗࡜ᾋయᅛ᭷࿘ᮇࡀ⣙ 6 s ࡛࠶ࡿࡓࡵ㸪࿘ᮇ 6 s ࡢἼ࿘ᮇ࡟ᑐࡍࡿ

ᖜࡢẚ࡟ࡼࡿἼഴᩳࡢᙳ㡪ࡀ኱ࡁ࠸ࡇ࡜ࡀせᅉ࡜ࡋ࡚⪃ᛂ⟅ࡀ㧗ࡃ࡞ࡗࡓ࡜⪃࠼ࡽࢀࡿ㸬࠼ࡽࢀࡿ㸬࡜ࡇࢁ࡛㸪90r⛬ᗘࡲ࡛኱ഴᩳࢆࡍࡿ࡜㸪୍⯡ⓗ࡞⯪(2) ᅇ㢌᭥⯟ᐇ㦂⤖ᯝ⯧࡛ࡣ㸪᚟ཎຊࡀᾘኻࡋ㌿そࡍࡿࡇ࡜ࡀ⪃࠼ࡽࢀࡿࡀ㸪ᅇ㢌᭥⯟᫬ࡢ⿵ຓ᭥⯪࠶ࡾࡢࢣ࣮ࢫ࡟࠾ࡅࡿືᦂ㔞ࢆᮏ◊✲࡟࠾࠸࡚ࡣ㸪ᾋయࡣඖࡢጼໃ࡟᚟ඖࡋࡓ㸬ࡇࢀࡣ

ᅗ-4 ࡞ࡽࡧ࡟ᅗ-5 ࡟♧ࡍ㸬⤖ᯝ࠿ࡽ᭥⯟㏿ᗘࡢቑຍ࡟

ᾋయࡀ෇⟄ᙧ≧࡛࠶ࡿࡓࡵ㸪ᾋᚰࡢ఩⨨ࡀኚ໬ࡏࡎ㸪㌿

3-3

土木学会論文集B3（海洋開発）, Vol. 78, No. 2, I_265‐I_270, 2022.
1.5kt

100

3.0kt

5.0kt

80

3.0kt

5.0kt

1.5Pitching䠄deg䠅

Rolling䠄deg䠅

1.5kt

2.060

40
20

1.00.50.00024680

10246810

࿘ᮇ䠄s䠅

࿘ᮇ䠄s䠅



ᅗ-4 ᅇ㢌᭥⯟᫬㸦ᅇ㢌༙ᚄ 2R㸧ࡢືᦂ㔞㸦ᕥ㸸Rolling㸪ྑ㸸Pitching㸧
1.5kt

30

3.0kt

5.0kt

25

3.0kt

5.0kt

1.5

20

Pitching䠄deg䠅

Rolling䠄deg䠅

1.5kt

2.0

15
10
5

1.0

0.5
0.0

0
0

2

4

6

8

0

10

24

6

10

8

࿘ᮇ䠄s䠅

࿘ᮇ䠄s䠅



ᅗ-5 ᅇ㢌᭥⯟᫬㸦ᅇ㢌༙ᚄ 3R㸧ࡢືᦂ㔞㸦ᕥ㸸Rolling㸪ྑ㸸Pitching㸧
20

Rolling䠄deg䠅

0-20

420

480

540

600

660

-40
-60-80䠉䠖Ἀ᪉ྥ䜈䛾ᅇ㌿-100䝟䝽䞊䝇䝨䜽䝖䝹ᐦᗘ䠄deg²䞉s䠅䠇䠖ᓊ᪉ྥ䜈䛾ᅇ㌿

Tp=106.5s

10

᫬㛫䠄s䠅

8
6
4
2
00

0.02

0.04

0.06

0.08

0.1

࿘Ἴᩘf䠄Hz䠅

ᅗ-6 ᅇ㢌᭥⯟᫬㸦ᅇ㢌༙ᚄ 2R㸪᭥⯟㏿ᗘ 5.0 knot㸪Ἴ࿘ᮇ 9.0 s㸧ࡢ Rolling ࡢ᫬⣔ิ㸦ᕥ㸧࡞ࡽࡧ࡟ࣃ࣮࣡ࢫ࣌ࢡࢺࣝᐦᗘ㸦ྑ㸧そࡀ⏕ࡌ࡞࠿ࡗࡓ࡜⪃࠼ࡽࢀࡿ㸬⥆࠸࡚㸪Roll ࡢ᚟ཎຊ࡟ࡘ࠸࡚㸪ᅇ㢌༙ᚄ 2R㸪᭥⯟㏿ᗘ 5 knot㸪Ἴ࿘ᮇ 9 s ࡢ㐀Ἴࢣ࣮ࢫ࡟࠾ࡅࡿ᫬⣔ิ⤖ᯝ࡞ࡽࡧ࡟ࢫ࣌ࢡࢺࣝゎᯒ⤖ᯝࡢ୍౛㸦ᅗ-6㸧࠿ࡽ⪃ᐹࢆ⾜࠺㸬Rolling ࡢືᦂ࿘ᮇࡣ㸪106 s ⛬ᗘ࡛࠶ࡾ㸪ಀ␃⣔ࢆྵࡵࡓᅛ᭷࿘ᮇ࡜ᴫࡡ୍⮴ࡋ࡚࠸ࡿ㸬ࡇࡢࡇ࡜࠿ࡽ㸪ಀ␃⣔࡟ࡼࡿ᚟ཎຊࡀ༟㉺ࡋ࡚Ἀഃᓊഃ࠾ࡾ㸪ᾋయࡢືᦂ≉ᛶ࡟ᙳ㡪ࢆ୚࠼࡚࠸ࡿ࡜࠸࠼ࡿ㸬ࡑࡢࡓࡵ㸪ࡇࡢࡼ࠺࡞ᶓಽࡋࡢ㛗኱෇⟄ᙧ≧ࡢᾋయ᭥⯟᫬ඌ૾ӼǁƷ4QNNKPI࡟࠾ࡅࡿ᳨ウ࡟㝿ࡋ࡚ࡣ㸪ಀ␃⣔ࢆྵࡵࡓືᦂ≉ᛶࢆ⪃៖ࡍࡿᚲせࡀ࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓ㸬㐀Ἴࡲࡓ㸪⯪⯧࡞࡝ࡀἼᾉࡢ୰ࢆ㉮ࡿ㝿ࡣ㸪Ἴ࡜ฟ఍࠺࿘
ᮇࡀኚࢃࡿࡓࡵ㸪⯪యࡣࡇࡢฟ఍࠸࿘ᮇ࡛ᦂࢀࡿࡇ࡜࡟
࡞ࡿ㸬ࡇࢀࡣ㸪ࢻࢵࣉ࣮ࣛຠᯝࡢ୍✀࡛࠶ࡾ㸪ྥἼ࡛ࡣἈഃᓊഃ࿘ᮇࡀ▷ࡃ࡞ࡾ㸪㏣Ἴ࡛ࡣ㛗ࡃ࡞ࡿ㸬 ࡑࡇ࡛㸪Ἴྥ߯࡟෗┿-3 Rolling ࡢⓎ⏕≧ἣࡘ࠸࡚㸪㏣Ἴࢆ 0r㸪ྥἼࢆ 180r࡜ᐃ⩏ࡍࡿ࡜㸪つ๎Ἴ

3-4

土木学会論文集B3（海洋開発）, Vol. 78, No. 2, I_265‐I_270, 2022.
1.5knot䠄᚟㊰䠅

3.0knot䠄 ㊰䠅

3.0knot䠄᚟㊰䠅

1.0

1.0

0.8

0.8

0.6

0.6

Pitch䠄deg䠅

Pitch䠄deg䠅

1.5knot䠄 ㊰䠅

0.4

0.2
0.0

5.0knot䠄 ㊰䠅

5.0knot䠄᚟㊰䠅



8

10

0.4
0.2
0.0

0

2

4

6

8

10

12

024

ฟ఍䛔Ἴ࿘ᮇ䠄s䠅

6ฟ఍䛔Ἴ࿘ᮇ䠄s䠅ᅗ-7 ᅇ㢌ࢣ࣮ࢫࡢ㸦ᕥ㸸ᅇ㢌༙ᚄ 2R㸪ྑ㸸ᅇ㢌༙ᚄ 3R㸧
ᡯඬἼ䛻䜘䜛⁻ὶ
ɼ୻ᑔූ˳ԗ஖UĬԗ஖Uĭԗ஖UĮԗ஖Uįԗ஖Uĭԗ஖UĮԗ஖Uįᡯඬɼ୻ᑔූ˳ԗ஖UĬ෗┿-4 ⿵ຓ᭥⯪࡞ࡋࢣ࣮ࢫࡢᅇ㢌᫬㸦3R㸪3knot㸧ࡢᵝᏊ㸦ୖẁ㸸࿘ᮇ 6s㸪ୗẁ㸸࿘ᮇ 7s㸧
⾲-3 ⿵ຓ᭥⯪࡞ࡋࢣ࣮ࢫࡢᅇ㢌ྍྰ⤖ᯝ୰ࡢฟ఍࠸࿘ᮇ ࡣ㸪ḟᘧ(1)࡜࡞ࡿ 6)㸬
 =
−ᅇ㢌༙ᚄ ᭥⯟㏿ᗘ(1)㻝㻚㻡㻌㼗㼚㼛㼠ୖᘧ࡟࠾࠸࡚㸪ࡣἼ㛗㸦m㸧㸪ࡣἼ㏿㸦m/s㸧㸪ࡣ⯪㏿㸦m/s㸧࡛࠶ࡿ㸬(1)ࡢ㛵ಀᘧࢆ⏝࠸࡚㸪ᅇ㢌᫬ࡢ┤㐍㒊ศ࡟࠾ࡅࡿᅇ㢌๓ࢆ ㊰㸪ᅇ㢌ᚋࢆ᚟㊰࡜ᐃ⩏ࡋ㸪ᅇ㢌༙
ᚄ 2R㸪3R ࡟࠾ࡅࡿฟ఍࠸Ἴ࿘ᮇ࡟ᑐࡍࡿ Pitch ᪉ྥࡢື2R

㻟㻚㻜㻌㼗㼚㼛㼠

ᦂ㔞ࢆᩚ⌮ࡋࡓ㸦ᅗ-7㸧㸬ᅇ㢌༙ᚄ 2R㸪3R ࡢඹ㏻Ⅼ࡜ࡋ࡚㸪Ἴ࿘ᮇࡀ㛗ࡃ࡞ࡿ࡟ࡘࢀ࡚ Pitching ࡀ኱ࡁࡃ࡞ࡿഴྥ࡟࠶ࡿ㸬ࡲࡓ㸪ྠࡌฟ఍࠸Ἴ࿘ᮇ࡛࠶ࡗ࡚ࡶ㸪᚟㊰㸦㏣Ἴ㸧ࡼࡾ ㊰㸦ྥἼ㸧ࡢ᪉ࡀ㸪ືᦂ㔞ࡀ኱ࡁ࠸㸬ࡇࢀࡣ㸪㻡㻚㻜㻌㼗㼚㼛㼠 ㊰ࡢሙྜ㸪Ἴࡢୖὶഃ࡟఩⨨ࡍࡿ୺᭥⯪࡜ࢫࣃ࣮ᆺᾋ
యࡢ࣮ࣟࣉ㛗 100 m ࡣ㸪⿵ຓ᭥⯪࡜ࢫࣃ࣮ᆺᾋయࡢ࣮ࣟ
ࣉ㛗 40 m ࡟ẚ࡭࡚㛗ࡃ㸪᭥⯟࣮ࣟࣉ࡟ࡼࡿᣊ᮰ຊࡀᑠࡉ
࠸ࡇ࡜ࡀཎᅉࡔ࡜᥎ᐹࡉࢀࡿ㸬ࡇࡢࡇ࡜࠿ࡽ㸪᭥⯟᫬࡟㻝㻚㻡㻌㼗㼚㼛㼠࠾ࡅࡿฟ఍࠸Ἴ࿘ᮇࡔࡅ࡛࡞ࡃ㸪᭥⯟࣮ࣟࣉࡢ㛗ࡉ࡟ࡼࡿᣊ᮰ຊ࡟ࡘ࠸࡚ࡶ⪃៖ࡍࡿᚲせࡀ࠶ࡿ㸬᭱ᚋ࡟㸪⿵ຓ᭥⯪ࡀ࡞࠸ࢣ࣮ࢫ࡟㛵ࡍࡿ⪃ᐹࢆ⾜࠺㸬

3R⿵ຓ᭥⯪࡞ࡋ࡛ᅇ㢌ࡋࡓሙྜ㸪Ἴ࿘ᮇ࡜᭥⯟㏿ᗘࡢ᮲௳㻟㻚㻜㻌㼗㼚㼛㼠࡟ࡼࡗ࡚ࡣ㸪ࢫࣃ࣮ࡀἼ࡟⁻ὶࡉࢀ࡚ᅇ㢌࡛ࡁ࡞࠿ࡗࡓ㸬ྛ᮲௳࡟࠾ࡅࡿᅇ㢌ྍྰࡢ⤖ᯝࢆ⾲-3 ࡟♧ࡍ㸬࡞࠾㸪ᅇ㢌ࡢྍྰࡣ㸪ᅇ㢌ᚋ࡟ࢫࣃ࣮ࡀ┿ࡗ┤ࡄ࡟࡞ࡗ࡚࠸ࡿࡇ㻡㻚㻜㻌㼗㼚㼛㼠࡜ࢆᇶ‽࡜ࡋ࡚┠ど࡟ࡼࡗุ࡚᩿ࡋࡓ㸬ഴྥ࡜ࡋ࡚㸪ᅇ㢌༙ᚄ㸪᭥⯟㏿ᗘ࡞ࡽࡧ࡟Ἴ࿘ᮇࡀ኱ࡁࡃ࡞ࡿ࡟ࡘࢀ࡚

3-5࿘ᮇ䠄㼟䠅㻙㻡㻚㻜㻢㻚㻜㻣㻚㻜㻤㻚㻜㻥㻚㻜㻙㻡㻚㻜㻢㻚㻜㻣㻚㻜㻤㻚㻜㻥㻚㻜㻙㻡㻚㻜㻢㻚㻜㻣㻚㻜㻤㻚㻜㻥㻚㻜㻙㻡㻚㻜㻢㻚㻜㻣㻚㻜㻤㻚㻜㻥㻚㻜㻙㻡㻚㻜㻢㻚㻜㻣㻚㻜㻤㻚㻜㻥㻚㻜㻙㻡㻚㻜㻢㻚㻜㻣㻚㻜㻤㻚㻜㻥㻚㻜12ᅇ㢌ྍྰ䚽㽢㽢㽢㽢㽢䚽㽢㽢㽢䚽䚽䚽㽢㽢䚽䚽䚽䚽㽢㽢㽢㽢㽢䚽
㽢㽢䚽
䚽
䚽䚽䚽
䚽
䚽䚽䚽

土木学会論文集B3（海洋開発）, Vol. 78, No. 2, I_265‐I_270, 2022.

ᅇ㢌࡛ࡁ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬ᅇ㢌ྍྰࡢẚ㍑౛࡜ࡋ࡚㸪ࡓࡓࡵ㸪ᅇ㢌᫬ࡣᅇ㢌༙ᚄࢆ༑ศ࡟☜ಖࡍࡿᚲせᛶࡀ♧ᅇ㢌༙ᚄ 3R㸪᭥⯟㏿ᗘ 3.0 knot ࡢ࿘ᮇ 6 s ࡜ 7 s ࡟࠾ࡅࡿࡉࢀࡓ㸬ᅇ㢌᫬ࡢᵝᏊࢆ෗┿-4 ࡟♧ࡍ㸬࿘ᮇ 6 s ࡛ࡣ㸪Ἴ࡟ࡼࡗ࣭⿵ຓ᭥⯪ࡢ᭷↓࡟ࡼࡿ㐪࠸࡟╔┠ࡋ㸪⿵ຓ᭥⯪ࡀ࡞࠸࡚⁻ὶࡉࢀࡓࡇ࡜࡟ࡼࡾᅇ㢌࡛ࡁ࡚࠸࡞࠸୍᪉࡛㸪࿘ᮇࢣ࣮ࢫ࡟࠾࠸࡚ࡣ㸪Ἴ࿘ᮇࡀᑠࡉࡃ࡞ࡿ࡜Ἴ⁻ὶຊࡀ኱

7 s ࡛ࡣᅇ㢌࡛ࡁ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬ࡇࢀࡣ㸪▷࿘ᮇഃࡁࡃ࡞ࡿࡓࡵ㸪ᅇ㢌࡛ࡁ࡞࠸⌧㇟ࢆ☜ㄆ࡛ࡁࡓ㸬ࡑࡢࡓ࡛ᐃᖖἼ⁻ὶຊࡀ኱ࡁࡃ࡞ࡿࡓࡵ㸪ࡑࡢᙳ㡪࡛ᅇ㢌ฟ᮶ࡵ㸪ᅇ㢌᭥⯟᪋ᕤ࡟࠾ࡅࡿ⿵ຓ᭥⯪ࡢᚲせᛶࢆ☜ㄆࡋࡓ㸬࡞࠿ࡗࡓ࡜⪃࠼ࡽࢀࡿ㸬⿵ຓ᭥⯪ࢆ௜ࡅࡓሙྜࡣ㸪ࡇࡢࡼ࠺࡞Ἴ࡟ࡼࡿ⁻ὶࢆᢚไࡍࡿࡓࡵ㸪᭥⯟࣮ࣟࣉ࡟᭱኱

ཧ⪃ᩥ⊩

2792 kN ࡶࡢᙇຊࡀస⏝ࡋࡓ㸬௨ୖࡼࡾ㸪Ἴ࡟ࡼࡿ⁻ὶ1)ࡢᙳ㡪ࡀ࠶ࡿࡓࡵ㸪ᐇ᪋ᕤ࡛ࡣᅇ㢌᫬࡟⿵ຓ᭥⯪ࡀᚲせ2)࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓ㸬

4. ࠾ࢃࡾ࡟3)ᾋయᘧࢫࣃ࣮ᆺὒୖ㢼㌴᪋ᕤ࡛ࡢࢫࣃ࣮ᆺᾋయ᭥⯟࡟4)࠾࠸࡚㸪ᶓἼస⏝᫬࡞ࡽࡧ࡟ᅇ㢌᫬ࡢືᦂ≉ᛶࢆᢕᥱࡍ
ࡿࡓࡵࡢỈ⌮ᶍᆺᐇ㦂ࢆ⾜ࡗࡓ㸬⤖ㄽࢆ௨ୗ࡟ิグࡍࡿ㸬࣭ᶓἼస⏝ୗࡢ᭥⯟࡛ࡣ㸪ಀ␃⣔࡟ࡼࡿືᦂ≉ᛶࡀ☜ㄆ5)ࡉࢀ㸪࿘ᮇࡀ㛗࠸Ἴ࡛ Roll ᪉ྥࡢືᦂ㔞ࡀቑຍࡍࡿഴྥ
࡟࠶ࡗࡓ㸬࣭ᅇ㢌᭥⯟ᐇ㦂࡛ࡣ㸪᭥⯟㏿ᗘ࡟ᑐࡋ࡚ᅇ㢌༙ᚄࡀᑠࡉ6)࠸ሙྜ࡟㐲ᚰຊ࡟ࡼࡗ࡚ࢫࣃ࣮ࡀእഃ࡟኱ࡁࡃ Rollingࡍࡿ⌧㇟ࢆ☜ㄆࡋࡓ㸬ࡲࡓ㸪᭥⯟㏿ᗘ 5 knot ࡛ࡶᅇ㢌༙
ᚄࢆ 3R ࡲ࡛኱ࡁࡃࡍࡿࡇ࡜࡛㸪Rolling ࡀ኱ᖜ࡟ῶᑡࡋ

᪂࢚ࢿࣝࢠ࣮࣭⏘ᴗᢏ⾡⥲ྜ㛤Ⓨᶵᵓ㸸╔ᗋᘧὒୖ㢼ຊⓎ㟁ᑟධ࢞࢖ࢻࣈࢵࢡ㸪pp.24-26㸪2018.
ᕴㅬኴᮁ㸪Ᏹ㒔ᐑᬛ᫛㸪బ⸨㑳㸸ࢫࣃ࣮ᆺᾋయὀ᤼Ỉ࡟ࡼࡿ❧࡚㉳ࡇࡋཬࡧᶓಽࡋᣲື࡟㛵ࡍࡿᐇ㦂࡜ゎᯒ㸪᪥ᮏ⯪⯧ᾏὒᕤᏛ఍ㅮ₇఍ㄽᩥ㞟㸪Vol.30㸪pp.681684㸪2020.
すᮧඃᕼ㸪Ᏹ㒔ᐑᬛ᫛㸸኱ᆺ㉳㔜ᶵ⯪ࢆ⏝࠸ࡓ㢼㌴ὒ
ୖ᥋ྜ᫬ࡢືᦂ≉ᛶ㸪ᅵᮌᏛ఍ㄽᩥ㞟 A2㸦ᛂ⏝ຊᏛ㸧㸪
vol.69㸪No.2㸪pp.809-820㸪2013.
Ᏻ㔝ᾈ୍㑻㸪᳃ᒇ㝧୍㸪ᒣཱྀ࿴ᙪ㸪௒ᮧṇ㸪ᆏ஭຾ὒ㸸㛗኱ࢣ࣮ࢯࣥ᭥⯟᫬ࡢືᦂపῶ᪉⟇࡟㛵ࡍࡿ◊✲㸪ᾏὒ㛤Ⓨㄽᩥ㞟㸪vol.26㸪pp.825-830㸪2010.
㐨๓Ṋᑛ㸪బ㈏ᏹ㸪௒ᮧṇ㸪ᆏ஭຾ὒ㸪ྂ㈡኱୕㑻㸪୹⩚ᙉ㸪ఀ⸨ຬᚿ㸸␗ᙧ㛗኱ࢣ࣮ࢯࣥ᭥⯟᫬ࡢᣲື≉ᛶ࡟㛵ࡍࡿ◊✲㸪ᾏᓊᕤᏛㄽᩥ㞟㸪vol.74㸪No.2㸪
pp.1051-1056㸪2018.
ụ⏣Ⰻ✑㸪ᱵ⏣┤ဢ㸪ៅ⇲┈㸪ෆ⸨ᯘ㸸⯪య㐠ື ⪏⯟ᛶ⬟ ึ⣭⦅㸪p.4㸪ᡂᒣᇽ᭩ᗑ㸪2013.
   (Received February 3, 2022)(Accepted May 9, 2022)

STUDY ON MOTION CHARACTERISTICS OF TOWING A SPAR TYPEFLOATING BODY USING HYDRAULIC EXPERIMENT
Takuma KOBAYASHI, Takeshi NISHIHATA, Yasunobu Hiroi and Satoshi
HOKIMOTO
Hydraulic model experiments were conducted to understand the characteristics of the motion of a spartype floating tow under the action of transverse waves and during turning in the construction of a floating
spar-type offshore wind turbine. In the case of towing under the action of transverse waves, the amountof roll motion tended to increase with longer period waves and higher towing speeds. In the turning
towing experiment, we confirmed that the spar rolled outward significantly due to centrifugal force when
the turning radius was small in relation to the towing speed, and evaluated the towing speed and turning
radius during construction. In addition, we focused on the difference depending on whether an auxiliary
towing tug is used or not, and confirmed that in the case without an auxiliary tug, the wave drift force
becomes large when the wave period is small, and therefore, the tug cannot turn the head. Therefore, thenecessity of an auxiliary tug for turning towing construction was confirmed.

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