ＯＴＥＣVol. 18 (2013)，53〜57

53

沿い波利用型波力発電用遊水室内の水面動揺に関する研究ἢ࠸Ἴ฼⏝ᆺἼຊⓎ㟁⏝㐟ỈᐊෆࡢỈ㠃ືᦂ࡟㛵ࡍࡿ◊✲
13245⩚⏣㔝 ⿃⿸⩏㸨 ࣭኱ᮌ ༠* ࣭Pallav KOIRALA㸨 ࣭✀ᾆ ᆂ㍜㸨 ࣭኱す Ꮨ⛅㸨Study on the Motion of the Water in the Water Chambers
for Wave Energy Converter Aligned along Wave Propagation
123Kesayoshi HADANO㸨 , Kyo OHGI* , Pallav KOIRALA㸨 ,45Keisuke TANEURA㸨 and Toshiaki OHNISHI㸨*1

Yamaguchi Univ. Dept. of Civil and Environment Engineering
Tokiwadai 2-16-1, Ube, Yamaguchi, 755-8611 Japan

This paper describes the experimental result on the motion of water in the water chambers for wave energy converteraligned along the wave propagation direction so that the front walls of which do not suffer from the impulsive forces by thewave.

Property of the amplitude of the vertical motion of the water surface in the chambers is focused on.

Theamplification has been investigated by dimensionless parameters of the wave period/eigen period of U-shaped oscillation
ratio T/Tr, chamber size/wave length ratio ℓ/L㸪water depth/wave length ratio h/L ,amplitude of up and down of waterparticles/draft of the front wall ratio ζ/D. It has been shown that ℓ/L should be less than 0.1, that as T/Tr approaches unity theup and down of the water in the chambers is amplified.
Key Words : Wave Energy Conversion, Vertical Motion of Water, Water Chambers, along Wave Direction

1. ⥴   ゝᙜ◊✲ᐊࡣ㸪ࣉ࣮ࣜ㸪࣡࢖ࣖ㸪ᾋయ㸪㔮ྜ㗽㸪ࣛࢳ࢙ࢵࢺᶵᵓ࡞࡝࡟ࡼࡾᵓᡂࡉࢀࡿࠕᾋయ㔮ྜ㗽ᘧἼຊⓎ㟁⿦⨨ࠖࢆ㛤Ⓨ୰ 1) ~4)࡛࠶ࡿ㸬ࡇࢀࡣ㸪Ỉ㠃ୖୗືࡢືຊࢆᾋయ㔜㔞࡜࣡࢖ࣖᙇຊࢆ௓ࡋ࡚ࢩࣕࣇࢺᅇ㌿ࡢືຊ࡟ኚ᥮ࡋ㸪Ⓨ㟁ᶵࢆࡲࢃࡍ௙⤌ࡳ࡛࠶ࡿ㸬ࡇࡢሙྜ㸪ᾋయ࡟ἼࡢᶓⲴ㔜ࡢస⏝ࢆᅇ㑊ࡍࡿᚲせࡀ࠶ࡿ㸬ࡇࡢ┠ⓗ࡟ᑐࡋ࡚㸪㖄┤ቨࢆ⏝࠸࡚ᵓᡂࡋࡓ㐟Ỉᐊෆ࡟ᾋయࢆ㓄⨨ࡋ࡚㐟ỈᐊෆࡢỈሢࡢ㖄┤㐠ືࢆ฼⏝ࡍࡿࡇ࡜ࡀ᭷ຠ࡛࠶ࡿ㸬ࡇࡢࡼ࠺࡞㐟Ỉᐊࡣ㸪୰ᮧࡽ࡟ࡼࡾ ὶ᪉ᘧ 5)㹼6)࡟฼⏝ࡉࢀ࡚࠸ࡿࡀ㸪᣺ືỈᰕᆺ࡛ࡣ✵Ẽᐊ 7)㹼9)࡜ࡋ࡚⏝࠸ࡽࢀ࡚࠸ࡿ㸬ᚑ᮶ࡢ᪉ᘧࡣἼࢆṇ㠃࠿ࡽཷࡅࡿᙧᘧ࡛㸪Ἴ࡟ࡼࡾ⏕ࡌࡿỈሢࡢἼ㐍⾜᪉ྥࡢ㐠ືࢆᚋ᪉ቨ࡛ࢺࣛࢵࣉࡍࡿࡇ࡜࡟ࡼࡿ͆ࡼ࡝ࡳᅽ͇ⓗຠᯝࢆ฼⏝ࡋ࡚㐟Ỉᐊࡲࡓࡣ✵ẼᐊෆࡢỈ㠃ୖୗືࢆቑᖜࡍࡿࡇ࡜ࢆ≺ࡗ࡚࠸ࡿࡀ㸪๓㠃ቨࡀἼࡢ⾪ᧁຊ࡟ᑐᛂࡍࡿࡓࡵᙉᅛ࡟ࡍࡿᚲせࡀ࠶ࡾ㸪㧗ࢥࢫࢺࡀ㑊ࡅࡽࢀ࡞࠸㸬ࡇࡢ㧗ࢥࢫࢺࢆ㑊ࡅࡿࡓࡵ㸪ᢡࢀ⥺ᙧ≧࡟㓄⨨ࡉࢀࡓ㜵Ἴሐࡢ࠺ࡕሐయ㍈⥺ࡢྥࡁࡀ༟㉺ἼࡢἼྥࡁ࡜୍⮴ࡍࡿ༊㛫ࡢ እഃ࡟ᯟయ࡛ᙧᡂࡋࡓ㐟Ỉᐊࢆタ⨨ࡋ㸪ࡇࡢ୰࡟ᾋయࢆ㓄⨨ࡋ࡚✌ാࡍࡿࡇ࡜ࡀ⪃࠼ࡽࢀࡿ㸬ᮏ◊✲࡛ࡣ๓ሗ 10)࡟ࡘ࡙ࡁ㸪ࡇࡢᙧែ࡛ἼຊⓎ㟁⿦⨨ࢆ✌ാࡍࡿࡇ࡜ࢆ᝿ᐃࡋ㸪Ἴ࡟ࡼࡿἼຊⓎ㟁⏝㐟ỈᐊෆࡢỈ㠃ືᦂࡢᐇ㦂ィ ࢆ⾜ࡗࡓࡢ࡛ࡑࡢ⤖ᯝࢆሗ࿌ࡍࡿ㸬*ཎ✏ཷ௜ 2013 ᖺ 7 ᭶ 31 ᪥ᒣཱྀ኱Ꮫ ኱Ꮫ㝔⌮ᕤᏛ◊✲⛉ ♫఍ᘓタᕤᏛᑓᨷ㸦ࠛ755-8611 ᒣཱྀ┴Ᏹ㒊ᕷᖖ┙ྎ 2 ୎┠ 16-1㸧
*2୰ᮧᘓタᰴᘧ఍♫
*3
బ㈡኱Ꮫᾏὒ࢚ࢿࣝࢠ࣮◊✲ࢭࣥࢱ࣮*4ᰴᘧ఍♫ᘓタᢏ⾡◊✲ᡤ ᆅ⌫⎔ቃࢭࣥࢱ࣮
*5
ᅜᅵ஺㏻┬ ୰ᅜᆅ᪉ᩚഛᒁ 㫽ྲྀἙᕝᅜ㐨஦ົᡤE-mail:khadano@yamaguchi-u.ac.jp*1

54羽田野袈裟義，大木協，Pallav Koirala，種浦圭輔，大西季秋

2. ἼຊⓎ㟁⏝㐟Ỉᐊࡢホ౯2࣭1 ᐇ㦂⿦⨨࡜ᐇ㦂᪉ἲࡢᴫせᐇ㦂ࡣ㸪ᅜᅵ஺㏻┬ୗ㛵 ‴✵ ᢏ⾡ㄪᰝ஦ົᡤỈ⌮ᐇ㦂ࢭࣥࢱ࣮ෆࡢ㐀Ἴ࣭ᘔὶỈ㊰(඲㛗 41.0m㸪ᖜ 0.8m㸪
᭱኱Ỉ῝ 1.2m㸧ࢆ⏝࠸࡚⾜ࡗࡓ㸬㐟Ỉᐊᶍᆺࡣ㸪Fig.1 ࡟♧ࡍỈᖹ᩿㠃ࡀ୍㎶ 0.20m ࡢṇ᪉ᙧ࡛㧗ࡉ 0.40m㸪0.45
㹫㸪0.50㹫ࡢ࢔ࢡࣜࣝ〇㐟Ỉᐊࢆ 6 ࡘ㐃⤖ࡋࡓ඲㛗 2.225m ࡢࡶࡢ࡛࠶ࡿ㸬ࡇࢀࢆỈ㊰ෆࡢᡭ๓ഃቨ࡟ᅛᐃࡋ㸪㐟ỈᐊෆࡢỈ㠃ືᦂࡀ࢞ࣛࢫ〇Ỉ㊰ഃቨࢆ㏻ࡋ࡚┠ど࡛ࡁࡿࡼ࠺࡟ࡋࡓ㸬ᶍᆺࡢタ⨨఩⨨ࡣ㸪ࡑࡢ୰ᚰࢆ㐀Ἴᯈ࠿ࡽ 29.83m(Ἴୖഃඛ➃ࡀ 28.72m)࡜ࡋࡓ㸬ࡲࡓ㸪㐟Ỉᐊෆ࡜Ỉ㊰ෆࡢྜィ6 ࠿ᡤ㸦Fig.2 ࡢձ㹼ն㸧࡟Ἴ㧗ィࢆタ⨨ࡋࡓ㸬タ⨨఩⨨࡜Ἴ㧗ィࡢ␒ྕࡣḟࡢ㏻ࡾ࡛࠶ࡿ㸬Ἴୖഃ࠿ࡽ➨ 1㸪➨
3 ࠾ࡼࡧ➨ 5 ␒┠ࡢ㐟Ỉᐊෆ(ղ,մ,յ)㸪㐟Ỉᐊᶍᆺࡢඛ➃࠿ࡽ 1.72m ἼୖࡢỈ㊰୰ኸ(ձ)㸪㐟Ỉᐊᶍᆺࡢ୰ኸ఩
⨨࡛㐟Ỉᐊ࡜Ỉ㊰ഃቨࡢ୰ኸ఩⨨(ճ)㸪࠾ࡼࡧ㐟Ỉᐊᚋ➃ࡼࡾἼୗ 0.86m ࡢỈ㊰୰ኸ(ն)࡛࠶ࡿ㸬ᐇ㦂ࡣ㸪㐀Ἴᶵࢆ✌ാࡋ࡚ἼࢆⓎ⏕ࡉࡏ㸪Ἴ㧗ィ࡟ࡼࡾỈ㠃ኚືࢆ㸴Ⅼ࡛ ᐃࡋࡓ㸬ィ ᫬㛫ࡣ㐀Ἴ㛤ጞ࠿ࡽ㸪Ἴ㧗ィնࡢỈ㊰⤊➃࠿ࡽࡢ཯ᑕἼࢆឤ▱ࡍࡿࡲ࡛ࡢ᫬้ࡲ࡛࡜ࡋ㸪㐍⾜Ἴࡢࡳ࡟ᑐࡋ࡚ィ ࢆ⾜ࡗࡓ㸬ྠ᫬࡟㐟ỈᐊෆࡢỈ㠃ኚືࢆࣅࢹ࢜࡟グ㘓ࡋࡓ㸬ᐇ㦂ࡣ㸪ྛ᮲௳࡟ᑐࡋ࡚ 3 ᅇࡎࡘ⾜࠸㸪ྛἼ㧗ィࡢᖹᆒἼ㧗ࢆồࡵ㸪ᅇࡢᐇ㦂࡟ࡘ࠸࡚ࡑࡢᖹᆒ್ࢆ࡜ࡿࡇ࡜࡟ࡋࡓ㸬Ἴ㧗ィձ࡛ᚓࡽࢀࡓᖹᆒἼ㧗࡜Ἴ㧗ィղ㸪մ㸪յ࡛ᚓࡽࢀࡓᖹᆒἼ㧗ࡢẚ࡜ࡋ࡚ቑᖜ⋡ࢆồࡵࡓ㸬ᐇ㦂᮲௳ࢆ Table1 ࡟♧ࡍ㸬࡞࠾㸪Ἴ࿘ᮇ 1 ⛊ࡢሙྜ㸪㐟Ỉᐊෆ࡛ࡣỈ㠃ࡀഴ࠸ࡓ≧ែ࡛᪼㝆ࡋ㸪ࡑࡋ࡚Ἴ࡟ࡼࡿ㐟ỈᐊෆࡢỈሢ㐠ືࡣୖୗ㐠ື୺య࡟ࡣ࡞ࡽࡎ㸪ᮏ◊✲࡛┠ⓗ࡜ࡍࡿ≧ែ࡜࡞ࡽ࡞࠿ࡗࡓࡢ࡛㸪᳨ウᑐ㇟࠿ࡽ㝖እࡋࡓ㸬㐟ỈᐊෆࡢỈ㠃ୖୗືࡢ᣺ᖜࡢỈ㠃Ἴ࡟ᑐࡍࡿቑᖜẚࢆ࿘ᮇẚ T/Tr 㸪㐟Ỉᐊᖜ㺃Ἴ㛗ẚ ℓ/L㸪┦ᑐỈ῝h/L㸪Ỉሢୖୗື᣺ᖜ㺃ႚỈ῝ẚ ζ/D ࡢࣃ࣓࣮ࣛࢱ࡟ࡼࡾ⪃ᐹࢆ⾜ࡗࡓ㸬2࣭2 Ỉ㠃ୖୗືࡢቑᖜ⋡࡟㛵୚ࡍࡿࣃ࣓࣮ࣛࢱ
࿘ᮇẚ 77Uඹ᣺⌧㇟ࢆࣄࣥࢺ࡟㸪Ἴ࿘ᮇ T ࡜㐟ỈᐊෆỈ㠃ୖୗືࡢᅛ᭷࿘ᮇ Tr ࡜ࡢẚࢆ⪃࠼ࡓ㸪Fig.3 ࡢᵓᡂ࡛㸪㐟ỈᐊෆࡢỈ㠃ୖୗື࡟࠾࠸࡚㸪Ỉ఩ኚືࡀ㐟ỈᐊෆࡢỈࡢ័ᛶ㉁㔞࡟ཬࡰࡍຠᯝࢆ↓どࡍࡿ࡜㸪㐠ື᪉⛬ᘧࡣᘧ ࡛୚࠼ࡽࢀ㸪ࡇࢀࡼࡾ㸪Tr ࡣᘧ  ࡛୚࠼ࡽࢀࡿ㸬d 2K g Kdt 2 D0(1)

Tr2SDg(2)㐟Ỉᐊᖜ㺃Ἴ㛗ẚ ε/ ᾏὒἼࡢἼ㠃ࡣ᭤㠃࡛࠶ࡾ㸪Ỉ㠃ୖୗືࢆ฼⏝ࡍࡿἼຊⓎ㟁⿦⨨࡛ࡣ㸪ືຊ⋓ᚓ㒊ࡢỈᖹᑍἲࡀἼ㛗࡟ẚ࡭࡚ᑠࡉ࠸ࡇ࡜ࡀᚲせ࡛࠶ࡿ㸬ἼຊⓎ㟁࡛ࡣ㸪ࡇࡢ್ࡀἼ㛗ࡢ 1/10 ࡼࡾᑠࡉ࠸஦ࡀ᮲௳࡙ࡅࡉࢀ࡚࠸ࡿ㸬ࡑࡇ࡛㸪ࡇࢀ࡟ᑐᛂࡍࡿࣃ࣓࣮ࣛࢱ࡜ࡋ࡚㐟Ỉᐊᖜ࣭Ἴ㛗ẚ ℓ/L ࢆ⪃࠼ࡓ㸬ࡇࢀࡣࡲࡓ㐍⾜Ἴࡀ㐟Ỉᐊᖜ ℓ ࡟➼ࡋ࠸㛗ࡉࢆ
㏻㐣ࡍࡿࡢ࡟せࡍࡿ᫬㛫ԥt ࡜࿘ᮇ T ࡜ࡢẚ࡛࠶ࡿ㸬ࡇࢀࡣḟࡢࡼ࠺࡟♧ࡉࢀࡿ㸬Ἴ㏿ࢆ c ࡜ࡍࡿ࡜㸪ԥt=ℓ/ c ࡛࠶ࡾ㸪ࡲࡓ T=L/c ࡢ㛵ಀ࡟࠶ࡿ࠿ࡽԥ t/T= ℓ/L ࡜࡞ࡿ㸬Ἴᓟ⥺ࡀ㐟Ỉᐊ๓㠃ቨ࡜ゅᗘȟ࡛᮶くࡍࡿሙྜ㸪㐟Ỉᐊࡀឤ▱ࡍࡿἼ㛗ࡣ Lȟ= L /sinȟ㸪Ἴ㏿ࡣ cȟ=c/sinȟ࡜࡞ࡾ㸪ୖࡢ㛵ಀ࡟࠾࠸࡚ L ࡢ௦ࢃࡾ࡟ Lȟࢆ⏝࠸ࡿ㸬┦ᑐỈ῝ẚ K/ࡇࢀࡣ㸪Ἴࡀ῝ᾏἼⓗ࠿ὸᾏἼⓗ࠿ࢆ⾲ࡍᣦᶆࡀ࠶ࡾ㸪Ỉ㠃Ἴࡢ㐠ືࢆ⪃࠼ࡿ㝿࡟ᖖ࡟☜ㄆࡍ࡭ࡁ࡛࠶ࡿ㸬Ỉሢୖୗື᣺ᖜ㺃ႚỈ῝ẚȝ' Ỉሢୖୗືࡢ᣺ᖜȝ࡜㐟Ỉᐊ㝸ቨୗ➃῝ᗘࡍ࡞ࢃࡕႚỈ῝ D ࡜ࡢẚࡶ㐟ỈᐊෆࡢỈ㠃ୖୗື࡟᭷ពࡢᙳ㡪ࢆཬࡰࡍ࡜ࡳࡽࢀࡿ㸬ᚤᑠ᣺ᖜἼ⌮ㄽ࡛ࡣ㸪 z ࢆ㟼Ỉ㠃࠿ࡽ㖄┤ୖྥࡁ࡟࡜ࡿ࡜ࡁ㸪ᖹᆒ఩⨨ࡀỈ㠃ୗࡢⅬ z (Ỉ㠃ୗ࡛ࡣ z ࡣ㈇್)࡛࠶ࡿỈ⢏Ꮚࡢୖୗື᣺ᖜࡣḟᘧ࡛୚࠼ࡽࢀࡿ㸬9 H sinh k h  z2sinh kh(3)ࡇࡇ࡛㸪H ࡣἼ㧗㸪k ࡣࣛࢪ࢔ࣥ⾲♧ࡢἼᩘ k=2ȧ/L㸪h ࡣỈ῝࡛࠶ࡿ㸬 z ࡜ࡋ࡚࡝ࡢ್ࢆ⪃࠼ࡿࡢࡀ㐺ษ࡛࠶ࡿ࠿ࡢၥ㢟ࡀ࠶ࡿ㸬ࡇࡇ࡛ࡣ㸪 z ࡜ࡋ࡚㸪ࡇࢀࢆᖹᆒỈ㠃఩⨨࡜ࡍࡿỈ⢏Ꮚ࡟ᑐࡍࡿ z㝸ቨୗ➃఩⨨࡜ࡍࡿỈ⢏Ꮚ࡟ᑐࡍࡿ z0 ࠾ࡼࡧࡇࢀࢆ㐟ỈᐊD ࡟ᑐࡍࡿ ζ ࡢ್ࢆồࡵࡓ௚㸪 z ࢆᖹᆒỈ㠃఩⨨࠿ࡽ㐟Ỉᐊ㝸ቨୗ➃

55

沿い波利用型波力発電用遊水室内の水面動揺に関する研究఩⨨ࡲ࡛ࡢ㛫ࡢ㧗ࡉ࡜ࡍࡿ඲࡚ࡢỈ⢏Ꮚ࡟ࡘ࠸࡚ࡢᖹᆒࡢ ζ㸪ࡢྜィ 3 ㏻ࡾ࡟ࡘ࠸᳨࡚ウࡍࡿ㸬

Fig.1 Simplified plan view of experimental flumeFig.2 Water chambers and water level measuring points

Table1 Experimental condition             Ỉ῝㻔㼙㻕㻌 㻌

0.45䠈0.50䠈0.55䠈0.60䠈0.65

ႚỈ῝㻔㼙㻕㻌

0.05䠈0.10䠈0.15

㐟Ỉᐊୗ➃㻌
㧗䛥㻔㼙㻕㻌

0.40䠈0.45䠈0.50

࿘ᮇ㻔㼟㻕㻌

1䠈2䠈3

Ἴ㧗㻔ᴫᩘ㻕㻔㼙㻕㻌

0.04䠈0.06䠈0.08䠈0.10

                                  Fig.3 Water level in the chamber
3. ᐇ㦂⤖ᯝࡢ᳨ウἼୖഃ㐟Ỉᐊඛ➃࡛ࡣ㸪㐍⾜Ἴࡀ⾪✺ࡋࡓ஦ࡢᙳ㡪ࡀ࡛ࡿ㸬ࡇࡢᙳ㡪ࡣ㐟ỈᐊෆࡢỈࡢ㐠ື࡟ࡶ⾲ࢀࡿ㸬ࡇࡢࡓࡵ㸪ᮏ◊✲࡛ᑐ㇟࡜ࡍࡿ㸪ἢ࠸Ἴ฼⏝ࡢ㐟Ỉᐊࢆ⪃࠼ࡿሙྜ࡟ࡣ㸪᭱ࡶἼୖഃ࠿ࡽ࠶ࡿ⛬ᗘ㞳ࢀࡓ㒊ศࡢ㐟Ỉᐊ࡟ࡘ࠸࡚ㄪ࡭ࡿ஦ࡀᚲせ࡛࠶ࡿ㸬ࡓࡔࡋ㸪ཧ⪃ࡢࡓࡵ㸪ࡇࡇ࡛ࡣ᭱ࡶἼୖഃࡢ㐟Ỉᐊ No.1㸦ղ㸧ࡢ⤖ᯝࡶྜࢃࡏ࡚♧ࡍ㸬ᮏᐇ㦂࡛ࡣ㸪ᶍᆺࡢ㐟Ỉᐊ㛗ࡉࡀ▷࠸ࡀ㸪㐟Ỉᐊ No.5㸦յ㸧ࢆᙜ㠃ࡢ᳨ウᑐ㇟࡜ࡋ࡚⪃࠼ࡿ㸬 Fig.4 ࡣ㸪Ỉ㠃ୖୗືࡢቑᖜẚ࡜࿘ᮇẚ T/Tr ࡢ㛵ಀࢆ♧ࡍ㸬Ἴୗഃࡢ㐟Ỉᐊ 1R ࡟ࡘ࠸࡚ࡳࡿ࡜㸪ℓ/L=0.03 ࡛ࡣቑᖜ⋡ࡣ࿘ᮇẚ T/Tr ࡟ࡼࡾ࠶ࡲࡾኚ໬ࡋ࡞࠸ࡀ㸪ℓ/L=0.05 ࡢሙྜ࡟ࡣ T/Tr ࡀ㸯࡟㏆࡙ࡃ࡜ቑᖜ⋡ࡀቑ኱ࡋ࡚࠸
ࡿ㸬୧⪅ࡢ┦ᑐỈ῝ h/L ࡢ್ࡣࡑࢀࡒࢀ 0.08 ⛬ᗘ࠾ࡼࡧ㸪0.12㹼0.14 ⛬ᗘ࡛࠶ࡾ㸪h/L ࡢຠᯝࡀ࠶ࡿ஦ࢆ࠺࠿ࡀࢃࡏࡿ㸬Fig.5ࡣỈሢୖୗືࡢ᣺ᖜ࡜㐟Ỉᐊ㝸ቨႚỈ῝ࡢẚζ/Dࡀ㐟ỈᐊෆỈ㠃ୖୗືࡢቑᖜ⋡࡟ཬࡰࡍຠᯝࢆ♧ࡋ࡚࠸ࡿ㸬ᅗ࡛ࡣζ࡜ࡋ࡚ z 0 ~  D 㛫ࡢᖹᆒ್ࢆ⏝࠸ࡓሙྜࢆ♧ࡋࡓࡀ㸪 z 0 ࡟ᑐࡍࡿζ 㸪࠾ࡼࡧ z D ࡟ᑐࡍࡿζ࡟ࡘ࠸࡚ࡶࡇࢀ࡜ྠᵝࡢ⤖ᯝ࡟࡞ࡗࡓ㸬௨ୗ࡛ࡣ㸪Ἴୗഃࡢ㐟ỈᐊNo.5࡟ࡘ࠸࡚㏙࡭ࡿ㸬㐟ỈᐊNo.5ࡢሙྜ㸪㐟Ỉᐊୗ➃㧗ࡉ࡟ࡼࡽࡎ㸪ቑᖜ⋡ࡢ㊴㌍ࡣぢࡽࢀ࡞࠸㸬ᅗࡼࡾ㸪ℓ/L=0.05ࡢ᫬㸪ᴫࡋ࡚┦ᑐỈ῝h/Lࡀ኱ࡁ࠸࡯࡝ቑᖜ⋡ࡀ኱ࡁࡃ࡞ࡗ࡚࠸ࡿ㸬ℓ/L=0.03ࡢ࡜ࡁࡣ㸪 ζ/D࡟ࡼࡿቑᖜ⋡ࡢቑຍࡣぢࡽࢀ࡞࠸㸬
Fig.5 d ࡼࡾ h/L=0.144 ࡢቑᖜ⋡ࡀ h/L=0.137 ࡢቑᖜ⋡ࡼࡾࡶప࠸ࡀ㸪ࡇࡢ஦ࡣ௒ᚋࡼࡃ᳨ドࡍࡿᚲせࡀ࠶ࡿ㸬

56

1.81 . 8

1.61 . 6

1.4

1 . 4

1.2

1 . 2

ቑᖜ⋡

ቑᖜ⋡

羽田野袈裟義，大木協，Pallav Koirala，種浦圭輔，大西季秋

1.0
l/L=0.03 h/L=0.078䡚0.086
l/L=0.05 h/L=0.137
l/L=0.05 h/L=0.130
l/L=0.05 h/L=0.123

0.8
0.6

2.0

3.0

4.0
5.0
6.0
࿘ᮇẚ䠄 T/Tr䠅䠅

7.0

8.0l / L = 0 . 0 3l / L = 0 . 0 5l / L = 0 . 0 5l / L = 0 . 0 50 . 80 . 60 . 4
1 . 0

0.4
1.0

1 . 0

9.0

2 . 0

3 . 04 . 0 5 . 0 6 . 0
࿘ᮇẚ䠄 T / 䠅T

7 . 0

䡚0h / L. 0= 8hhh
8 . 0

9 . 0

 a) Chamber No.1                   㹠) Chamber No.5
1.800

1.800

1.600

1.600

1.400

1.400

1.200

1.200

ቑᖜ⋡

ቑᖜ⋡

Fig.4 Relation of amplification and T/Tr for the height of lower end of the chambers 40cm upward from flume bottom

1.000
0.800

1.000

0.800
0.600

0.600
l/L=0.03 h/L=0.078䡚0.086
l/L=0.05 h/L=0.137
l/L=0.05 h/L=0.130
l/L=0.05 h/L=0.123

0.400
0.200

0.200
0.000

0.000
00.2

0.4

0.6
ζ/D

0.8

1l/L=0.03 h/L=0.078䡚0.086
l/L=0.05 h/L=0.137
l/L=0.05 h/L=0.130
l/L=0.05 h/L=0.123

0.400

01.2

0.2

0.4

0.6
ζ/D

0.8

1

1.2

1.800

1.800

1.600

1.600

1.400

1.400

1.200

1.200

ቑᖜ⋡ቑᖜ⋡a) Chamber No.1; Height 40cmE) Chamber No.5; Height 40cm

1.000
0.800

0.600

0.200

0.800
0.600

l/L=0.03 h/L=0.073䡚0.082
l/L=0.05 h/L=0.130
l/L=0.05 h/L=0.123
l/L=0.05 h/L=0.115

0.400

1.000

l/L=0.03 h/L=0.082䡚0.090
l/L=0.05 h/L=0.144
l/L=0.05 h/L=0.137
l/L=0.05 h/L=0.130

0.400
0.200

0.000

0.000

00.2

0.4

0.6
ζ/D

0.8

11.2

00.2

0.4

0.6
ζ/D

0.8

11.2F) Chamber No.5; Height 45cmG) Chamber No.5; Height 50cm
Fig.5 Relation of amplification and ȝ/D for the various heights of the lower end of chambers from flume bottom
4. ⤖ㄽ௨ୖ㸪ᾋయ㔮ྜ㗽ᘧἼຊⓎ㟁⿦⨨࡟⏝࠸ࡿἼຊⓎ㟁⏝㐟ỈᐊෆࡢỈ㠃ືᦂࡢᐇ㦂ィ ࡜ࡑࡢ⤖ᯝࡢ⪃ᐹࢆ⾜࡞ࡗࡓ㸬㐟ỈᐊෆࡢỈ㠃ືᦂࡢቑᖜ≉ᛶ࡟㛵ࡋ࡚㸪㸲ࡘࡢ↓ḟඖࣃ࣓࣮ࣛࢱ(࿘ᮇẚ T/Tr㸪㐟Ỉᐊᖜ㺃Ἴ㛗ẚ ℓ/L㸪┦ᑐỈ῝ẚ h/L㸪Ỉሢୖୗື᣺ᖜ㺃ႚỈ῝ẚ ζ/D ࡟ࡼࡾㄪ࡭ࡓ㸬ࡑࡢ⤖ᯝ㸪ℓ/L =0.03 ࡜ ℓ/L =0.05 ࡜࡛ቑᖜ⋡ࡢኚ໬≉ᛶࡀ␗࡞ࡗ࡚࠸ࡓ㸬ℓ/L =0.03 ࡢሙྜ࡟ࡣ㸪௚ࡢ 3 ࡘࡢࣃ࣓࣮ࣛࢱ࡟ࡼࡿቑᖜ⋡ࡢኚ໬ࡀ࠶ࡲࡾㄆࡵࡽࢀ࡞࠿ࡗ
ࡓ㸬ℓ/L =0.05 ࡢሙྜ࡛ࡣ㸪ቑᖜ⋡ࡀ࿘ᮇẚ T/Tr ࡀ 1 ࡟㏆࡙ࡃ⛬㸪┦ᑐỈ῝ẚ h/L ࡀ኱ࡁ࠸⛬኱ࡁ࠸ࡇ࡜ࡀศ࠿ࡗ
ࡓ㸬ࡲࡓ㸪Ỉሢୖୗື᣺ᖜ㺃ႚỈ῝ẚ ζ/D ࡟ࡼࡿቑᖜ⋡ࡢኚ໬ࡣ࠶ࡲࡾㄆࡵࡽࢀ࡞࠿ࡗࡓ㸬 ௒ᚋࡣ㸪ࡼࡾ㛗࠸㐟Ỉᐊᶍᆺࢆ⏝࠸࡚ᐇ㦂ࢆ⾜࡞࠺࡜ඹ࡟㸪㐟Ỉᐊࡢᵓ㐀࡟ࡘ࠸࡚ࡉࡽ࡟ヲ⣽࡞᳨ウࢆ⾜࡞࠺ணᐃ࡛࠶ࡿ㸬沿い波利用型波力発電用遊水室内の水面動揺に関する研究57ཧ⪃ᩥ⊩1) ⩚⏣㔝⿃⿸⩏㸪✀ᾆᆂ㍜㸪Ώ㑓ㄔ㸪୰㔝බᙪ㸪ᩧ⸨ಇ㸪ᯇᾆṇᕫ㸸ᾋయᘧἼຊ࢚ࢿࣝࢠ࣮ኚ᥮ࡢຊᏛ㸪     ᅵᮌᏛ఍ㄽᩥ㞟 B㸪Vol.62, No.3, pp.270-283, 2006.
2) Koirala, P., Hadano,K., Nakano,K. and Taneura, K. : Dynamics Model of Movable Body-type Wave Energy Converter Considering Two Dimensional Motions Of The Float, Doboku Gakkai Ronbunshuu B , Vol.65, No.3, pp.179-189,2009.
3) ✀ᾆᆂ㍜㸪⩚⏣㔝⿃⿸⩏㸪⡿ᒣ἞⏨㸪ụୖᅜᗈ㸪୰㔝බᙪ㸸ྍື≀యᆺἼຊⓎ㟁⿦⨨ࡢඹ᣺≉ᛶࡢ᳨ウ㸪     ᅵᮌᏛ఍ㄽᩥ㞟 B㸪Vol.66, No.2, pp.196-206, 2010.
4) ⩚⏣㔝⿃⿸⩏㸪ᯇᒸඞᘺ㸪Koirala ,P.㸪୰㔝බᙪ㸪✀ᾆᆂ㍜㸸⵳ຊᶵ⬟ࢆࡶࡘྍື≀యᆺἼຊⓎ㟁ࡢຊᏛ᳨ウ㸪  ᅵᮌᏛ఍ㄽᩥ㞟 A1㸦ᵓ㐀࣭ᆅ㟈ᕤᏛ㸧㸪 Vol.67, No.1, pp.213-224, 2011.
5) ⚄㔝඘㍤㸪ᑠ㔝ሯᏕ㸪୰ᮧᏕᖾ㸸㐟ỈᐊᆺᾏỈ஺᥮㜵Ἴሐࡢᐇᾏᇦ࡛ࡢ㐺⏝஦౛࡜ᑟỈ≉ᛶ࡟ࡘ࠸࡚㸪ᾏὒ㛤Ⓨㄽᩥ㞟㸪➨ 26 ᕳ㸪pp.747-751㸪2010.
6) ୰ᮧᏕᖾ㸪ሯཎ㟹⏨㸪᪥㧗㐩ஓ㸸ᾋయᘧᵓ㐀ࢆ᝿ᐃࡋࡓ㖄┤ΰྜಁ㐍⿦⨨ࡢ㛤Ⓨ࡟㛵ࡍࡿᇶ♏ⓗ◊✲㸪ᅵᮌᏛ఍ㄽᩥ㞟 B2㸦ᾏᓊᕤᏛ㸧㸪Vol.66㸪pp.1186-1190㸪2010.
7) ᑠᓥᮁྐ㸪㕥ᮧㅍྖ㸪ྜ⏣Ⰻᐿ㸸ἼຊⓎ㟁ࢣ࣮ࢯࣥࡢ✵Ẽฟຊ࡟㛵ࡍࡿ⌮ㄽ࠾ࡼࡧᐇ㦂㸪➨ 30 ᅇᾏᓊᕤᏛㅮ
₇఍ㄽᩥ㞟㸪pp.638-642㸪1983.
8) ┈⏣ၿ㞝㸸᪥ᮏࡢἼຊⓎ㟁㸪㟘ฟ∧♫㸪1987.
9) 㧗ᶫ㔜㞝㸪Ᏻ㐩ᓫ㸸ᅛᐃᘧỈᰕ᣺ືᆺἼຊⓎ㟁ࢩࢫࢸ࣒ࡢタィ࡜ᐇ㦂ⓗ᳨ド㸪➨ 35 ᅇᾏᓊᕤᏛㅮ₇఍ㄽᩥ㞟㸪
pp.837-841㸪1988.
10) ရᕝு㸪⩚⏣㔝⿃⿸⩏㸪✀ᾆᆂ㍜㸪ཎ⏣㎮୍㸪Pallav Koirala㸪኱すᏘ⛅㸸ἼຊⓎ㟁⏝㐟ỈᐊෆࡢỈ㠃ືᦂ࡟㛵ࡍࡿᐇ㦂ⓗ◊✲ᅵᮌᏛ఍୰ᅜᨭ㒊◊✲Ⓨ⾲఍ᴫせ㞟2012.