** ∊ᇢݡ⦺Ʊ ☁༊Ŗ⦺ŝ ([email protected])
Received August 13, 2013/ revised August 25, 2013/ accepted September 1, 2013
Copyright ⵑ 2013 by the Korean Society of Civil Engineers
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0)
ǣǣȀȀǤǤȀͳͲǤͳʹͷʹȀ ǤʹͲͳ͵Ǥ͵͵ǤǤʹ͵Ͷ͵
Ǥ ǤǤ
ቻ♪ⵃ♪㣊#⸮ሲ⮎⛚#Ⳟኳጪ⸮ⴖ#ቧ≻㱦ኺ⮎#ᢾ㬚#⢢㮖
ଲஂ ȵট ȵլ
Lee, Jong-In*, Kim, Sun Ou**, Kim, Kyoung Ho***
Experiments for Side Wall Effects of a Perforated Structure Under Oblique Incident Waves
ABSTRACT
The wave height distributions in front of a vertically perforated wall structures for obliquely incident uni-directional irregular waves are mainly investigated by using 3D hydraulic experiments. The difference and similarity of wave propagation along the plain and perforated wall structures are investigated and particularly the effects of side walls in chamber and relative chamber width are analyzed.
This study shows that the wave height distribution patterns for normalized wave heights in front of structure is significantly different between the plain and perforated wall structures, and the side wall in the chamber suppresses the growth of waves.
Key words : Laboratory experiment, Perforated structure, Side wall, Chamber width, Uni-directional irregular wave
Ⅹಾ
ᅙᩑǍᨱᕽ۵ᇩȽ⊺❭ෝݡᔢᮝಽ⦽Ğᔍ᯦ᔍ❭ԕᮁŖǍ᳑ྜྷᱥ໕ᨱᕽ᮹❭Łᇥ⡍ෝ❭ᦦ⦹ʑ᭥⧕⠪໕ᙹ᳑ෝᯕᬊ⦽ᙹญᝅ⨹ᮥᙹ
⧪⦹ᩡ݅. ᅙᩑǍ۵❭௲᮹ᱥ❭✚ᖒᨱᯩᨕྕŖǍ᳑ྜྷŝᮁŖǍ᳑ྜྷ᮹₉ᯕᱱŝᮁᔍᱱᨱݡ⧕á☁⦹ᩡᮝ໑, ✚⯩ᮁŖǍ᳑ྜྷ᮹ᮁᙹᝅ⡎
ŝᮁᙹᝅԕĊᄞ᮹⬉ŝᨱݡ⧕á☁⦹ᩡ݅. ᱽℕᱥ໕᮹ᔢݡ❭Ł۵ᮁŖǍ᳑ྜྷᯙĞᬑ᪡ྕŖǍ᳑ྜྷᯙĞᬑᨱๅᬑⓑ₉ᯕaᯩᮭᮥᅕᩡᮝ ໑, ᮁᙹᝅԕĊᄞᮡᩑ❭᮹ၽݍᮥᨖᱽ┅۵äᮝಽӹ┡ԍ݅.
áᔪᨕ ᙹญᝅ⨹, ᮁŖǍ᳑ྜྷ, Ċᄞ, ᮁᙹᝅ⡎, ᯝႊ⨆ᇩȽ⊺❭
1. ᕽು
⧎อǍ᳑ྜྷ(ႊ❭ᱽ, ᱲᦩᖅ॒)᮹ÕᖅᙹᝍᯕʫŁᖅĥ❭ŁaⓑĞᬑᨱ۵Ğᱽᖒၰᦩᱶᖒ⪶ᅕ॒᮹⊂໕ᨱᕽĞᔍǍ᳑ྜྷ
ᅕ݅۵ḢพǍ᳑ྜྷಽÕᖅࡹ۵Ğ⨆ᯕ݅. ḢพǍ᳑ྜྷ⩶ᵲᱥ໕ᨱᮁŖᇡෝᖅ⊹⦽ᮁŖǍ᳑ྜྷᮡĞᱽᖒ⊂໕ᨱᕽ۵ྕŖǍ᳑ྜྷᨱ
እ⧕݅ᗭᇩญ⦽⊂໕ᯕᯩḡอ, ⬉ᬊᖒ⊂໕ᨱᕽ۵ᬑᙹ⦹݅Ł⧁ᙹᯩ݅. ᕽݡ⩶⧎อǍ᳑ྜྷᯙĞᬑᨱŞᖅŝᱲᦩᖅ
॒ᨱᮁŖǍ᳑ྜྷ(ᮁŖ1ᝅੱ۵ᮁŖ2ᝅ)᮹ᱢᬊᯕ᷾a⦹Łᯩ݅. ᮁŖǍ᳑ྜྷᮡⓍíᱥ໕ᄞ᮹ᔢ݉ᇡ░⦹݉ʭḡᱥℕaᮁŖᇡಽ
Ǎᖒࡽᱥ໕ᮁŖǍ᳑ྜྷ(fully perforated structure)ŝᱶᙹ໕ᮥʑᵡᮝಽᔢ·⦹ᇡᯝᇡǍeᨱอᮁŖᇡෝᖅ⊹⦹۵ᇡᇥᮁŖǍ᳑ྜྷ
(partially perforated structure)ಽǍᇥ⧁ᙹᯩᮝ໑, ᝅᱽᖅĥၰÕᖅᨱ۵ᦩᱶᖒŝĞᱽᖒ⊂໕॒ᨱᕽᮁญ⦽ᇡᇥᮁŖǍ᳑ྜྷᯕ
ݡᇡᇥ ᱢᬊࡹŁ ᯩ݅.
३؋ф२χėॡ
Fig. 1. Experimental Setup and Measurements Sections
ᮁŖǍ᳑ྜྷ᮹}ֱᮡJarlan(1961)ᨱ᮹⧕ᮭᱽᦩࡹᨩᮝ໑, Jarlan⩶ႊ❭ᱽ۵ᮁŖ⩶ᱥ໕ᄞŝྕŖ⩶⬥໕ᄞᮝಽǍᖒࡽ݅.
Jarlanᨱ᮹⧕ᱽᦩࡽᮁŖ⩶ႊ❭ᱽᨱݡ⧕݅᧲⦽ᩑǍaḥ⧪ࡹᨕ
᪵Ł, ⩥ᰍࠥḥ⧪ᵲᯕ݅. Fugazza and Natale(1992)ᮡ݅ᵲᮁᙹ ᝅ᮹ᮁŖႊ❭ᱽᨱݡ⦽ၹᔍᮉᔑᱶᮥᮁࠥ⦹Ł, Ƚ⊺❭ෝᱢᬊ
⦹ᩍᔢݡᮁᙹᝅ⡎(relative chamber width)ᯕ0.25ᯙ᳑Õᨱᕽ
↽ᗭၹᔍᮉᯕӹ┡ԉᮥᅕᩡ݅. Suh and Park(1995)ᮡGalerkin Łᮁ⧉ᙹჶᮥᯕᬊ⦹ᩍᔍᕾษᬕऽ᭥ᨱ᭥⊹⦽ᮁŖ⍡ᯕᜉႊ❭
ᱽᨱᯝᱶbࠥಽ᯦ᔍ⦹۵❭ᨱݡ⦽ၹᔍ✚ᖒᮥᩑǍ⦹ᩡᮝ໑,
⧕ᕾđŝ۵ᙹญ༉⩶ᝅ⨹đŝ᪡እƱ⦹ᩡ݅. ᮁŖǍ᳑ྜྷ᮹ᗭ❭
✚ᖒᨱš⦽ʑ᳕ᩑǍॅᮡᮁŖᇡᨱ᮹⦽ᨱթḡqᙁ, ᱢᱶᮁŖᮉ
ၰᮁᙹᝅ⡎᮹đᱶᨱǍࡹ۵ᯱഭ᮹ࠥ⇽ᨱᵲᱱᮥࢱᨩ݅.
ᇩȽ⊺❭ෝᱢᬊ⦽ʑ᳕ᩑǍॅᨱ᮹⦹໕ᮁŖ1ᝅᯙĞᬑᨱᱢᱶ
ᮁŖᮉ(porosity)ᮡ ᧞ 30%ᯕ݅.
ʑ᳕ᩑǍ᮹ݡᇡᇥᮡ❭௲ᯕǍ᳑ྜྷᨱḢbᮝಽ᯦ᔍ⦹۵᳑Õ ᨱᕽᮁŖǍ᳑ྜྷ᮹ᙹญ✚ᖒᮥ᭥ᵝಽá☁⦽äᯕ໑, Ğᔍ᯦ᔍ❭
ᨱݡ⦽ᮁŖǍ᳑ྜྷ᮹ᗭ❭✚ᖒᨱݡ⦽ᩑǍ۵ᔢݡᱢᮝಽၙၙ⦽
ᝅᱶᯕ݅. Li et al.(2003)ᮡ2ᵲᮁᙹᝅ᳑Õᨱᕽ᯦ᔍbᨱෙ
ၹᔍĥᙹෝŁᮁ⧉ᙹᱥ}ჶ(eigenfunction expansion method)ᮥ
ᯕᬊ⦹ᩍá☁⦹ᩡᮝ໑, Liu et al.(2007)ᮡᖁ⩶⡍▱ᖽᯕು(linear potential theory)ᮥᯕᬊ⦹ᩍᮁŖ⍡ᯕᜉᨱ❭௲ᯕĞᔍḡí᯦ᔍ
⦹۵ Ğᬑᨱ ݡ⦽ ᮁᙹᝅ ԕᇡ᪡ ᇡ᮹ ❭Łᇥ⡍ෝ Ƚ⊺❭ෝ
ᱢᬊ⦹ᩍ á☁⦹ᩡᮝӹ, ᙹญᝅ⨹đŝ ॒ŝ᮹ እƱ۵ ᙹ⧪⦹ḡ
ᦫᦹ݅. Liu et al.(2009)ᮡĞᔍ᯦ᔍ❭ᨱݡ⦽ᮁŖ⍡ᯕᜉ᮹ၹᔍ ĥᙹෝȽ⊺❭ෝᱢᬊ⦹ᩍ⧕ᕾ⦹ᩡᮝ໑, ᯦ᔍbᯕ᷾a(Ḣb᯦ᔍ ᮹ Ğᬑᨱ 0°)⧁ᙹಾ ၹᔍĥᙹa ᷾a⧉ᮥ ᅕᩡ݅. Lee and Kim(2012)ᮡȽ⊺❭ෝᱢᬊ⦽ᙹญᝅ⨹ᮝಽĞᔍ᯦ᔍ❭᳑Õᨱ ᕽᮁŖǍ᳑ྜྷᱥ໕᮹❭Łᇥ⡍ෝĥ⊂⦹ᩍᮁŖǍ᳑ྜྷ᮹ᗭ❭⬉
ŝෝ⪶ᯙ⦹۵࠺ᨱᮁᙹᝅԕĊᄞ᮹ᮁྕa❭௲᷾⡎ᨱၙ⊹۵
ᩢ⨆ᮥ á☁⦽ ၵ ᯩᮝӹ, ᇩȽ⊺❭ෝ ᱢᬊ⦽ đŝ۵ ᱽ⦹ḡ
ᦫᦹ݅.
ᅙ ᩑǍᨱᕽ۵ ᇩȽ⊺❭a ᮁŖǍ᳑ྜྷᨱ Ğᔍḡí ᯦ᔍ⦹۵
Ğᬑᨱ݅᧲⦽᳑Õᮥᖅᱶ⦹ᩍᙹญᝅ⨹ᮥᙹ⧪⦹ᩡ݅. Ğᔍ᯦ᔍ
❭᳑ÕᨱᕽᮁŖǍ᳑ྜྷᮥݡᔢᮝಽ᯦ᔍb, ᔢݡᮁᙹᝅ⡎, ᮁᙹᝅ
ԕĊᄞ᮹⩶ᔢၰ᳕ᰍᩍᇡ॒ᨱෙᱽℕᱥ໕᮹❭Łᇥ⡍ෝ
ĥ⊂⦹ᩍྕŖǍ᳑ྜྷ᮹Ğᬑ᪡እƱ⦹ᩡᮝ໑, ੱ⦽Ƚ⊺❭ෝᱢᬊ
⦽ Lee and Kim(2012)᮹ đŝ᪡ እƱ á☁⦹ᩡ݅.
2. ᝅ⨹ᖅ
2.1 ਓਏডࢫୋण
ᅙᝅ⨹ᨱᔍᬊࡽ᳑❭ʑ۵݅ႊ⨆ᇩȽ⊺❭᳑❭ʑಽᕽȽ⊺❭,
ᯝႊ⨆ᇩȽ⊺❭ၰ݅ႊ⨆ᇩȽ⊺❭᮹᳑❭aa܆⦽ᔍ⩶(snake- type) ᳑❭ʑᯕ݅. ᳑❭ʑbǍ࠺ᇡᨱᩑđࡽ᳑❭❱⦹ӹ᮹⡎ᮡ
0.5 m, ׳ᯕ۵1.1 mಽᕽ᳑❭ʑ᮹ᱥℕ⡎ᮡ30 mᯕŁ, ᳑❭ʑ۵
60}᮹Ǎ࠺ᇡಽǍᖒࡹᨕᯩᮝ໑, ᱥʑᕽᅕ⦝ᜅ★ᯕ݅. ᳑❭ʑ ۵↽ݡᙹᝍ0.7 m, ↽ݡᰍ⩥❭Ł0.3 m, ᰍ⩥ᵝʑ0.5 sec~3.0 sec᮹ᖒ܆ᮥaḡŁᯩ݅. əญŁᝅ⨹ᨱᔍᬊࡽ⠪໕ᙹ᳑۵ʙᯕ
42 m, ⡎ 36 m, ׳ᯕ 1.05 mᯕ݅.
ᅙᝅ⨹ᨱᔍᬊࡽᇥᕾᰆእ۵⍕⥉░, ᷾⡎ʑၰA/D converter
॒ᮝಽǍᖒࡹᨕᯩᮝ໑, ᝅ⨹❭ᱽᬱᨱᔾᖒࡽ᳑❭ᝁ⪙ෝ
᳑❭ʑಽᘂᝁ⦹Ł, ❭Łĥಽᇡ░ࠦ≉ࡽᯱഭෝᵝ❭ᙹᜅ⟺✙ౝ
ၰ❭Ł॒ᮝಽᇥᕾ⦹۵ʑ܆ᮥ⦹۵ᰆ⊹ᯕ݅. ᝅ⨹❭ᖅᱶၰ
❭Łĥ⊂ᨱᔍᬊࡽ❭Łĥ۵ᬊప❭Łĥ(༉ߙCHT4-60)ಽᕽ
ʙᯕ۵0.6 mᯕŁ, ⊂ᱶჵ᭥۵0~±30 cmᯕ໑, ᅙᝅ⨹16ݡ᮹
❭Łĥෝᬕᬊ⦹ᩡ݅. ᝅ⨹ᨱᕽ۵20Hz᮹ࠦ≉ᮉಽᯱᮁᙹ໕ᮥ
ĥ⊂⦹ᩡ݅.
2.2 ਓઽલ
ᮁŖǍ᳑ྜྷŝĞᔍ᯦ᔍ❭᪡᮹ᔢ⪙šĥᨱݡ⦽ᙹญᝅ⨹ᮥ᭥
⧕ᱥᚁ⦽݅ႊ⨆᳑❭ᙹ᳑ԕᨱʙᯕ20 m᮹ḢพᮁŖǍ᳑ྜྷᮥ
ᖅ⊹⦹ᩡ݅. ᙹญᝅ⨹ᮡᮁ⦽⦽ᙹ᳑ԕᨱᕽᙹ⧪ࡹအಽǍ᳑ྜྷᨱ
᮹⦽ၹᔍ❭ෝᱢᱩ⯩ᗭ❭┅ḡ༜⦹໕ ᝅ⨹đŝ᮹ᝁࠥa
ᱡ⦹ࡽ݅. ᕽᅙᝅ⨹ᨱᕽ۵᳑❭ʑၹݡ⠙᮹ᙹ᳑ᄞᨱ1:12 Ğᔍ᮹ᘥᕾᮥ႑⊹⦹ᩍၹᔍ❭ෝᱽᨕ⦹ᩡᮝ໑, ᳑❭ʑ⬥໕ᮡ
Table 1. Types of Model Structure Case ID
(model structure) Types of front wall Types of side wall
PW plain wall -
PV_NS perforated wall
with vertical-type slit none
PV_PS perforated wall
with vertical-type slit plain wall
PV_VS perforated wall with vertical-type slit
perforated wall with vertical-type slit
(a) Side View (b) Top View
(c) Front View
Fig. 2. Schematic Diagram of Model Structure Table 2. Dimensions of Model Structure (unit : cm)
W B hb hC S CW CL t
Front and side wall with vertical-type slit
b1 b2 b3 b4
60 78 40 15 13.8 12.5
25.0 13 1 1.5 2 1 3
ᜅ▭ᯙญᜅᰍḩ᮹ᗭ❭ᖅᮥᖅ⊹⦹ᩍ᳑❭ʑ⬥໕ᨱᕽၽᔾ⦹
᮹ᗭ❭ᖅၰᘥᕾᮥᖅ⊹⦹ᩍ᧲⊂ᄞ໕ᨱ᮹⦽ၹᔍ❭ෝᱽᨕ⦹
ᩡ݅(Fig. 1 ₙ᳑).
ᝅ⨹༉⩶ᮡ᳑❭ʑᱥ໕ᮝಽᇡ░5 m, ᳑❭ʑ⊂໕ᮝಽᇡ░
3 m ਉᨕḥ ᭥⊹ᨱᕽᇡ░ ᖅ⊹⦹ᩡᮝ໑, ᳑❭ʑ ᱥ໕ᮝಽᇡ░
ᯝᱶǍeᮡ᳑❭ʑᨱ᮹⧕ၽᔾࡽ❭௲ᮥᮁࠥ⦹Ł, ᳑❭ʑ⬥໕ᮝ ಽᇡ░ၽᔾࡽၹᔍ❭a ᝅ⨹ᩢᩎԕᨱᩢ⨆ᮥၙ⊹ḡ༜⦹ࠥಾ
⦹ʑ᭥⧕ᇩ⚍ᙹᖒᮁࠥ❱ᮥᖅ⊹⦹ᩡ݅. Fig. 1ᮡᝅ⨹ᩢᩎၰ
༉⩶ᖅ⊹}ֱࠥෝӹ┡ԙäᮝಽᕽⱖ۵Ǎ᳑ྜྷŝ᯦ᔍ❭aᯕ۵
bᯕ໑, ĥ⊂ḡᱱ᮹ᬱᱱ(xo, yo)ᮡ᳑❭ʑᱥ໕5 m, ᳑❭ʑ⊂໕
3 mᨱ ᖅᱶ⦹ᩡ݅.
3. ᝅ⨹༉⩶ၰᝅ⨹᳑Õ
ᅙᩑǍᨱᕽᙹ⧪⦽ᙹญᝅ⨹ᮡᮁŖǍ᳑ྜྷᨱ❭௲ᯕĞᔍḡí
᯦ᔍ⧁ভᮁŖǍ᳑ྜྷ᮹Ċᄞᯕ❭௲᮹᷾⡎ᱡqᨱၙ⊹۵ᩢ⨆ᮥ
á☁⦹۵ äᯕ ᵝࡽ ༊ᱢᯕ໑, ᯕෝ ᭥⧕ ᱥ໕ᄞ(front wall)ᯕ
ྕŖᯙĞᬑ(case PW), ᱥ໕ᄞᯕᮁŖᯙ᳑ÕᨱᕽĊᄞ(side wall) ᯕᨧ۵Ğᬑ(case PV_NS), ĊᄞᯕྕŖ⩶┽ᯙĞᬑ(case PV_PS), ĊᄞᯕᮁŖ⩶┽ᯙĞᬑ(case PV_VS)ෝݡᔢᮝಽ⦹ᩡ݅(Table 1 ₙ᳑).
ᅙᝅ⨹ᨱᕽᔍᬊࡽḢพᮁŖǍ᳑ྜྷ༉⩶ᮡᦥⓍตᰍḩಽᱽ᯲
⦹ᩡᮝ໑, ༉⩶᮹ ⡎(W)ᮡ 0.6 m, ׳ᯕ(hb+hc)۵ 0.55 mᯕŁ, ʙᯕ۵20 mᯕ݅. ᝅ⨹ᮡᯝᱶᙹᝍᔢᨱᕽȽ⊺❭ၰᯝႊ⨆ᇩȽ⊺
❭ෝݡᔢᮝಽᙹ⧪⦹ᩡᮝ໑, ᝅ⨹ᨱᱢᬊࡽᙹᝍ(ho)ᮡ0.45 mᯕ
݅. ᝅ⨹ᮁŖǍ᳑ྜྷ༉⩶ᮡ׳ᯕ0.05 m᮹ᔍᕾษᬕऽ᭥ᨱ
ᖅ⊹⦹ᩡʑভྙᨱᝅ⨹ᙹ᳑ၵ݆ᮝಽᇡ░Ǎ᳑ྜྷᔢ݉ʭḡ۵0.6 mᯕ໑, ᱶᙹ໕ᮝಽᇡ░Ǎ᳑ྜྷᔢ݉ʭḡ᮹ᩍᮁŁ(hC)۵0.15 m ᯕ݅. ᮁŖᇡᱥℕʙᯕ۵0.138 mᯕŁ, ᱶᙹ໕ᮝಽᇡ░ᮁŖᇡ
ᔢ݉ʭḡ᮹ʙᯕ(SU)۵0.075 m, ᱶᙹ໕ᮝಽᇡ░ᮁŖᇡ⦹݉ʭḡ ᮹ʙᯕ(SL)۵0.063 mᯕ݅. əญŁᱥ໕ᄞᮝಽᇡ░⬥໕ᄞ(rear
wall)aḡ᮹Ñญᯙᮁᙹᝅ⡎(CW)ᮡ0.125 m᪡0.250 mෝᱢᬊ
⦹ᩡᮝ໑, ᮁŖᄞ᮹ᮁŖᇡᱽᬱᮡb1=0.015 m, b2=0.02 m, b3=0.01 mၰb4=0.03 mᯕŁ, ᮁŖᇡǍeอᮥݡᔢᮝಽ⦹ᩡᮥভᮁŖᮉ (porosity)ᮡ᧞30.8%ᯕ݅. ᅙᩑǍᨱᕽᙹ⧪⦽ݡᇡᇥ᮹ᝅ⨹ᨱ ᕽ۵CW=0.125 mෝᱢᬊ⦹ᩡŁ, CW=0.250 m۵ᮁᙹᝅ⡎ᨱ
ෙ⬉ŝෝá☁⦹ʑ᭥⧕ᱽ⦽ᱢᯙ᳑Õᨱᕽอᙹ⧪ࡹᨩ݅. əญ Ł݉᭥⧉ℕ᮹ʙᯕ(B)۵0.78 mᯕŁᮁŖᄞ᮹ࢱ̹(t)۵0.01 mᯕ໑, ᮁᙹᝅԕĊᄞe᮹eĊ(CL)ᮡ0.13 mᯕ݅. ᝅ⨹❭௲ᨱ
᮹⧕༉⩶Ǎ᳑ྜྷᯕᬡḢᯕḡᦫࠥಾԕᇡᨱᘥᕾᮥ₥ᬭᵲపᮥ
⪶ᅕ⦹ᩡᮝ໑, Ǎ᳑ྜྷ׳ᯕ0.6 m᪡ᙹᝍ0.45 m۵ᬵ❭aၽᔾ⦹
ḡ ᦫ۵ ᳑Õᯕ݅(Fig. 2 and Table 2 ₙ᳑).
ᝅ⨹ᨱᱢᬊࡽ᯦ᔍ❭᮹ᵝʑ(T)۵T=0.9 sec᪡T=1.6 secᯕŁ,
❭Ł(H)۵0.03 m᪡0.06 mᯕ݅. Table 3ᮡᅙᝅ⨹ᨱᱢᬊࡽ
ᝅ⨹❭ᱽᬱᮥ᧞⦽äᮝಽTo, HoၰLo۵bbȽ⊺❭᯦ᔍ᳑Õ (case M1 & M2)ᨱ⧕ݚ⦹۵ᵝʑ, ❭Łၰ❭ᰆᯕ໑, (TS)o, (HS)o ၰ(LS)o۵bbᇩȽ⊺❭᯦ᔍ᳑Õ(case R1 & R2)᮹ᮁ᮹ᵝʑ,
Table 3. Wave and Test Conditions in Experiment
case ID(wave) wave period, To & (TS)o(sec) wave height, Ho & (HS)o(m) wave length, Lo & (LS)o(m) incident angle, 쩁(°) water depth, ho(m)
M1, R1 0.9 0.03 1.238
10, 30 0.45
M2, R2 1.6 0.06 2.963
ᮁ᮹❭Łၰᮁ᮹ᵝʑᨱ⧕ݚ⦹۵❭ᰆᯕ݅. ho=0.45 m ᳑Õᨱᕽ
ᖁ⩶ᇥᔑšĥᮝಽᇡ░ĥᔑࡽ❭ᰆ(L)ᮡT=0.9 secᯙĞᬑᨱ
L=1.238 m, T=1.6 secᯙ Ğᬑᨱ L=2.963 mᯕ݅. ᅙ ᝅ⨹ᨱ
ᔍᬊࡽ༉⩶ʙᯕ20 m۵T=0.9 secᨱݡ⧕ᕽ۵16.1L, T=1.6 secᨱݡ⧕ᕽ۵6.7Lᨱ⧕ݚࡽ݅. ᝅ⨹ᨱᱢᬊࡽ᯦ᔍ❭᳑Õᮡᝅ⨹
ᘥ❭aၽᔾ⦹ḡᦫ۵᳑Õᯕ໑, Ǎ᳑ྜྷŝ᯦ᔍ❭aᯕ۵b(ⱖ)ᮡ
10°᪡30°ᯕ݅. əญŁᇩȽ⊺❭۵Bretschneider-Mitsuyasu ᵝ❭ᙹ
ᜅ⟺✙ౝᮥᯕᬊ⦹ᩡ݅. ᙹญᝅ⨹ᨱᔍᬊࡽ᳑❭ʑaᔍ⩶᳑❭ʑ ᯕအಽĞᔍ᯦ᔍ❭ෝᰍ⩥⧁ᙹᯩᮝӹ, ᯦ᔍbᯕ⍅ḩĞᬑᨱ۵
⫭ᱩ❭ಽᯙ⧕ᝅ⨹đŝ᮹ᱶ⪶ࠥaᱡ⦹ࢁᙹᯩᨕᅙᝅ⨹ᨱᕽ
᯦ᔍ❭۵᳑❭ᖁᨱḢbႊ⨆᮹ᯝႊ⨆ᮝಽ᳑❭⦹ŁᮁŖǍ᳑ྜྷ
༉⩶᮹ᖅ⊹bࠥෝᄡĞ⍽᯦ᔍb(ⱖ)ᮥ᳑ᱩ⦹ᩡ݅. ᝅ⨹᯦ᔍ
❭۵Fig. 1᮹xo=yo=0 mᯙ᭥⊹ᨱᕽ, əญŁǍ᳑ྜྷᯕᖅ⊹ࡹḡ
ᦫᮡ ᳑Õᨱᕽ ḥ⧪❭ }ֱᮝಽ ᖅᱶ⦹ᩡ݅.
ḢพǍ᳑ྜྷŝ Ğᔍ᯦ᔍ❭ᨱ ᮹⧕ ၽᔾࡹ۵ ❭௲᷾⡎ ⩥ᔢᮡ
Ǎ᳑ྜྷᮥෙႊ⨆(xႊ⨆)ŝǍ᳑ྜྷḢbႊ⨆(yႊ⨆)ᮝಽĥ⊂ᮥ
⦹ᩡᮝ໑, Ǎ᳑ྜྷᮥ ෙ ❭Ł۵ ᱽℕᱥ໕ᨱᕽ 0.05 m ਉᨕḥ
᭥⊹ᨱᕽĥ⊂⦹ᩡ݅. ❭ŁĥaǍ᳑ྜྷᨱᯙᱲ⧁ĞᬑᨱǍ᳑ྜྷ
ᱥ໕ᄞŝ❭Łĥᔍᯕ᮹eᖎᮝಽᯙ⧕ᙹ໕ᯕᙽeᱢᮝಽᔢ⧁
ᙹᯩᮝ໑, ᯕ۵ᝅ⨹⊂᪅₉ෝᙹၹ⧁ᙹᯩʑভྙᨱǍ᳑ྜྷᱥ໕ᮝ ಽᇡ░ᯝᱶeĊᯕĊ⦹ᩍ❭Łĥෝ႑⊹⦹ᩡ݅. T=0.9 secᯙ
Ğᬑ, Ǎ᳑ྜྷ ᱥ໕ᮥ ෙ ❭Ł۵ x=0~6.4 m Ǎeᮡ ⱀx=0.2 meĊ, x=6.4~18.8 m Ǎeᮡⱀx=0.4 m eĊᮝಽĥ⊂⦹ᩡᮝ໑, T=1.6 secᯙĞᬑᨱ۵x=0~18.8 m Ǎeᮥⱀx=0.4 m eĊᮝಽ
ĥ⊂⦹ᩡ݅. əญŁǍ᳑ྜྷḢbႊ⨆ᮝಽ᮹❭Łĥ⊂ᮡT=0.9 secᯙĞᬑᨱx/L=6ŝ15ᯙḡᱱ, T=1.6 secᯙĞᬑᨱx/L=2᪡
6ᯙḡᱱᨱᕽᙹ⧪⦹ᩡ݅. Ǎ᳑ྜྷḢbႊ⨆ᮝಽ۵y=0.2~6.4 mʭ ḡⱀy=0.2 m eĊᮝಽ❭Łෝĥ⊂⦹ᩡ݅. ᝅ⨹᳑❭eᮡ
300 secಽᕽT=0.9 secᯙĞᬑᨱ᧞333❭, T=1.6 secᯙĞᬑᨱ
᧞ 188❭ᨱ ⧕ݚࡹ໑, ĥ⊂❭Ł۵ ⬥ၹᇡ 205 sec(T=0.9 sec᮹
Ğᬑᨱ᧞228❭, T=1.6 secᯙĞᬑᨱ᧞128❭) ࠺ᦩĥ⊂ࡽᯱഭෝ
ᩢᱱᔢ⨆Ʊ₉ჶ(zero-up-crossing method)ᮝಽ ᇥᕾ⦹ᩡ݅.
4. ᝅ⨹đŝၰᇥᕾ
ᅙᩑǍᨱᕽ۵ḢพᮁŖǍ᳑ྜྷᨱ❭௲ᯕĞᔍḡí᯦ᔍ⦹۵
Ğᬑᨱ ᮁŖǍ᳑ྜྷ᮹ Ċᄞᯕ ❭௲᮹ ᷾⡎ ੱ۵ ᱡqᨱ ၙ⊹۵
ᩢ⨆ᮥᇥᕾ⦹ʑ᭥⧕ᙹญᝅ⨹ᮥᙹ⧪⦹ᩡᮝ໑, ᯦ᔍ❭᮹᯦ᔍb,
❭Łၰᵝʑ, ᮁᙹᝅԕĊᄞ᮹ᮁྕ᪡Ċᄞ᮹⩶, ᮁᙹᝅ⡎᮹
ᄡ⪵॒ᨱ ෙ Ǎ᳑ྜྷᱥ໕ ၰ Ǎ᳑ྜྷḢbႊ⨆ᮝಽ᮹ ❭Łෝ
ĥ⊂⦹ᩍእƱᇥᕾ⦹ᩡ݅. ᮁŖǍ᳑ྜྷᮥݡᔢᮝಽĥ⊂ࡽᯱഭ۵
ྕŖǍ᳑ྜྷ᮹ ᝅ⨹đŝ᪡ እƱ⦹ᩡᮝ໑, ᅙ ᩑǍᨱᕽ ᱽ⦹۵
ݡᇡᇥ᮹ đŝ۵ ᇩȽ⊺❭ෝ ᱢᬊ⦽ äᯕ݅.
Fig. 3ᮡ᯦ᔍ❭aR1(CW*=0.101)ᯙ᳑Õᨱᕽⱖ=10°᪡30°ᨱ
ݡ⧕Ǎ᳑ྜྷᱥ໕ᮥෙᔢݡ❭Ł(H*)ෝྕŖǍ᳑ྜྷᯙĞᬑ, ᱥ໕ ᄞᯕᮁŖᄞᯙ᳑ÕᨱᕽĊᄞ(side wall)ᯕᨧ۵Ğᬑ᪡Ċᄞᯕ
᳕ᰍ⦹۵Ğᬑᨱݡ⦽đŝෝእƱࠥ⦽äᯕ݅. ᩍʑᕽCW*۵
ᔢݡᮁᙹᝅ⡎ᮝಽᕽᇩȽ⊺❭ᯙĞᬑCW*=CW/(LS)o(Ƚ⊺❭ᯙ
Ğᬑ, CW*=CW/Lo)ᯕŁ, H*=HS/(HS)o(Ƚ⊺❭ᯙĞᬑ, H*=H/Ho) ᯕ݅. ⱖ=10°ᯙ᳑ÕᨱᕽĊᄞᯕᨧ۵Ğᬑ۵Ǎ᳑ྜྷᱱᮥᱽ⦹
Ł۵ྕŖǍ᳑ྜྷŝÑ᮹ᮁᔍ⦽ᔢݡ❭Łෝᅕᯕ໑, ĊᄞᯕᨧŁ
ⱖ=30°ᯙ᳑Õ᮹Ğᬑᨱ۵ᨕ۱ᱶࠥ᮹❭Łᱡq⬉ŝ۵ᯩᮝӹ, Ċᄞᯕ᳕ᰍ⦹۵Ğᬑᨱእ⧕ᕽ۵ᔢݚ⯩ⓑᔢݡ❭Łaĥ⊂ࡹᨩ
݅. bb᮹ᝅ⨹ᦩᄥ₉ᯕᱱᮥᇥᕾ⦹ʑ᭥⧕ĥ⊂ࡽᔢݡ❭Łෝ
ᝅ⨹Ǎeᱥℕෝݡᔢᮝಽᔑᚁ⠪Ɂ⧕ᅕ໕, ⱖ=10°ᯙ᳑Õᨱᕽ
PW ᝅ⨹ᦩ᮹Ğᬑ(H*)aveⴉ1.63ᯕŁPV_NS᮹Ğᬑ(H*)aveⴉ 1.30ᯕ݅. Fig. 3ᨱᕽx*>3ᯙǍeᨱᕽ۵PW᪡PV_NS᮹ᔢݡ❭
Ł᮹₉ᯕ۵Ⓧḡᦫḡอ, ᱥℕǍeᮥݡᔢᮝಽ⦽Ğᬑᨱ₉ᯕa
እƱᱢⓍíӹ┡ӹ۵äᮡᮁŖǍ᳑ྜྷ ᱱᇡᨱᕽᔢݡ❭Ła
ᔢݡᱢᮝಽ᯲ʑভྙᯕ݅. PV_PS᪡PV_VS᮹Ğᬑ, (H*)ave۵
bb0.43ŝ0.38ಽᕽⓑ₉ᯕෝᅕᯕḡᦫᦹ݅. ⱖ=30°ᯙ᳑Õᨱᕽ ۵ PW᮹ Ğᬑ (H*)aveⴉ1.96, PV_NS᮹ Ğᬑ (H*)aveⴉ1.52, PV_PS᮹Ğᬑ(H*)aveⴉ0.79, PV_VS᮹Ğᬑ(H*)aveⴉ0.78ಽ
ᇥᕾࡹᨩᮝ໑, ⱖ=10°ᯙ᳑Õŝᮁᔍ⦽Ğ⨆ᮥᅕᯙ݅. Fig. 4۵
᯦ᔍ❭aR2(CW*=0.042)ᯙ᳑Õ᮹đŝෝࠥ⦽äᮝಽᕽR1᮹
Ğᬑ᪡ษ₍aḡಽĊᄞᯕᨧ۵ᮁŖǍ᳑ྜྷ ᱥ໕᮹ᔢݡ❭Ł۵
ྕŖǍ᳑ྜྷ᮹Ğᬑᨱእ⧕᧞e᯲íӹ┡ԍḡอə₉ᯕ۵Ⓧḡ
ᦫᦹ݅. ⱖ=10°ᯙ᳑Õᨱᕽ۵PW᮹Ğᬑ(H*)aveⴉ1.47, PV_NS ᮹Ğᬑ(H*)aveⴉ1.28, PV_PS᮹Ğᬑ(H*)aveⴉ0.98, PV_VS᮹
Ğᬑ(H*)aveⴉ0.98ಽᇥᕾࡹᨩᮝ໑, ⱖ=30°ᯙ᳑Õᨱᕽ۵PW᮹
Ğᬑ (H*)aveⴉ2.02, PV_NS᮹ Ğᬑ (H*)aveⴉ1.88, PV_PS᮹
Ğᬑ(H*)aveⴉ1.50, PV_VS᮹Ğᬑ(H*)aveⴉ1.51ᯕ݅. ᱥℕᱢᮝ ಽR1 ᝅ⨹❭᮹Ğᬑᅕ݅⠪Ɂᔢݡ❭ŁaⓍíӹ┡ԍᮝ໑, ᯕ۵
᯦ᔍ❭᮹ᵝʑaᔢݡᱢᮝಽʙʑভྙᨱCW*aqᗭ⦹ᩍᗭ❭⬉
Fig. 3. Relative wave Heights Along a Wall (x-dir.) by Side Wall Types (Test Case : R1, Cw*=0.101). (a) 쩁=10°, (b) 쩁=30°
Fig. 4. Relative wave Heights Along a Wall (x-dir.) by Side Wall Types (Test Case : R2, Cw*=0.042). (a) 쩁=10°, (b) 쩁=30°
Fig. 5. Relative wave Heights Normal to a Wall (y-dir.) by Side Wall Types at x*=6 (Test Case : R1, Cw*=0.101). (a) 쩁=10°, (b) 쩁=30°
Fig. 6. Relative wave Heights Normal to a Wall (y-dir.) by Side Wall Types at x*=15 (Test Case : R1, Cw*=0.101). (a) 쩁=10°, (b) 쩁=30°
ŝaਉᨕḡʑভྙᯕ݅. R1᮹đŝᯙFig. 3ᨱᕽĊᄞᯕ᳕ᰍ⦹۵
Ğᬑ۵ᮁŖǍ᳑ྜྷᱥ໕᮹ᔢݡ❭Łaᱥℕᱢᮝಽ1 ᯕ⦹ಽĥ⊂ࡹ
ᨩᮝ໑, ᯕ۵ᮁŖǍ᳑ྜྷ᮹❭௲᷾⡎ᨖᱽ⬉ŝaᬑᙹ⧉ᮥ᮹ၙ⦽
݅ ⧁ ᙹ ᯩ݅. R2۵ R1ᨱ እ⧕ ᯦ᔍ❭᮹ ᵝʑa ʙᨕḱᮝಽ
ᯙ⧕, ᷪᔢݡᮁᙹᝅ⡎ᯕqᗭ⧉ᨱĊᄞᯕ᳕ᰍ⦹۵ᮁŖǍ᳑
ྜྷ᮹Ğᬑᨱࠥᝅ⨹᳑ÕԕᨱᕽǍ᳑ྜྷᱥ໕᮹ᔢݡ❭Ł۵1 ᯕᔢᮝ ಽӹ┡ԍᮝ໑, ᔢݡᮁᙹᝅ⡎ᯕqᗭ⧉ᨱྕŖǍ᳑ྜྷᱥ໕᮹
ᔢݡ❭Ł᪡᮹₉ᯕ۵R1ᨱእ⧕qᗭ⦹ᩡ݅. ᱥℕᱢᮝಽ᯦ᔍbᯕ
᷾a⧁ᙹಾ, ᔢݡᮁᙹᝅ⡎ᯕ᯲ᮥᙹಾᔢݡ❭Ł۵Ⓧíӹ┡ԍ݅.
əญŁR1ŝR2 ᳑Õ༉ࢱᮁŖǍ᳑ྜྷ᮹Ċᄞᯕ᳕ᰍ⦹۵Ğᬑᨱ
ĊᄞᯕᮁŖ⩶┽ᯙĞᬑ(PV_VS)aྕŖ⩶┽ᯙĞᬑ(PV_PS)ᨱ
እ⧕ᱥℕᱢᮝಽ᧞e᯲ᮡᔢݡ❭Łෝᅕᩡᮝӹə₉ᯕ۵Ⓧḡ
ᦫᦹ݅. Fig. 3 and Fig. 4ᨱᕽᔢݡÑญ(x*)۵x*=x/(LS)o(Ƚ⊺❭
ᯙ Ğᬑ, x*=x/Lo)ᯕ݅.
Fig. 5 and Fig. 6ᮡ ᯦ᔍ❭a R1(CW*=0.101)ᯙ ᳑Õᨱᕽ
bbx*=6ŝ15ᯙ᭥⊹ᨱᕽǍ᳑ྜྷḢbႊ⨆ᮝಽ᮹ᔢݡ❭Łෝ
᯦ᔍbᄥಽእƱࠥ⦽äᯕ݅. x*=6 ᭥⊹ᨱᕽ᮹đŝෝᔕ⠕ᅕ໕
ྕŖǍ᳑ྜྷŝĊᄞᯕᨧ۵ᮁŖǍ᳑ྜྷ᮹ᔢݡ❭Łaᮁᔍ⦹íӹ
┡ԉᮥᅝᙹᯩᮝ໑, ᯕ۵Fig. 3 and Fig. 4ᨱࠥࡽđŝ᪡
࠺ᯝ⦽ Ğ⨆ᯕ݅. x*=15 ᭥⊹ᨱᕽⱖ=10°ᯙ ᳑Õᨱᕽ۵ PW᮹
Ğᬑ (H*)aveⴉ1.11, PV_NS᮹ Ğᬑ (H*)aveⴉ1.06, PV_PS᮹
Ğᬑ(H*)aveⴉ1.06, PV_VS᮹Ğᬑ(H*)aveⴉ1.06ᮝಽᇥᕾࡹᨩ ᮝ໑, ⱖ=30°ᯙ᳑Õᨱᕽ۵PW᮹Ğᬑ(H*)aveⴉ1.38, PV_NS᮹
Ğᬑ (H*)aveⴉ1.31, PV_PS᮹ Ğᬑ (H*)aveⴉ1.03, PV_VS᮹
Ğᬑ(H*)aveⴉ1.02ᯕ݅. Ċᄞᯕ᳕ᰍ⦹۵ᮁŖǍ᳑ྜྷ᮹Ğᬑᨱ۵
Ǎ᳑ྜྷᱥ໕ᨱᕽᔢݡᱢᮝಽԏᮡ❭Łaᇥ⡍⧉ᮥᙹᯩᮝ໑,
᯦ᔍbᯕ᷾a⧉ᨱǍ᳑ྜྷᱥ໕᮹ᔢݡ❭Ł۵᷾ݡࡹᨩ݅.
ĥ⊂᭥⊹(x*=6ŝx*=15)ᨱෙᔢݡ❭Ł᮹₉ᯕ۵Ⓧḡᦫᦹᮝ ӹx*=15 ᭥⊹ᨱᕽ᮹ᔢݡ❭Ła᧞eⓍíĥ⊂ࡹᨩ݅. əญŁ
ⱖ=10° ᳑Õᨱᕽ۵ Ǎ᳑ྜྷಽᇡ░ 3❭ᰆ ᱶࠥ ᯕĊ(y*ⴉ3)ࡹ໕
Fig. 7. Relative wave Heights Normal to a Wall (y-dir.) by Side Wall Types at x*=2 (Test Case : R2, Cw*=0.042). (a) 쩁=10°, (b) 쩁=30°
Fig. 8. Relative wave Heights Normal to a Wall (y-dir.) by Side Wall
Types at x*=6 (Test Case : R2, Cw*=0.042). (a) 쩁=10°, (b) 쩁=30° Fig. 9. Measured Frequency Spectra by Side Wall Types at x*=6.46 (Test Case : R1, Cw*=0.101). (a) 쩁=10°, (b) 쩁=30°
Ǎ᳑ྜྷ᮹⩶ᨱෙ₉ᯕ۵Ñ᮹ӹ┡ӹḡᦫᦹᮝӹ, ᯦ᔍbᯕ
ⓑⱖ=30° ᳑Õᨱᕽ۵ᱥၹᱢᮝಽᮁŖǍ᳑ྜྷᯙĞᬑaྕŖǍ᳑ྜྷ
ᨱ እ⧕ ᔢݡ❭Ła ԏí ӹ┡ԍ݅. Figs. 7 and 8ᮡ ᯦ᔍ❭a
R2(CW*=0.042)ᯙ᳑Õᨱᕽbbx*=2᪡6ᯙ᭥⊹ᨱᕽǍ᳑ྜྷ
Ḣbႊ⨆ᮝಽ᮹ᔢݡ❭Łෝ᯦ᔍbᄥಽእƱࠥ⦽äᮝಽᕽᱥ ၹᱢᯙ Ğ⨆ᮡ R1 ᳑Õŝ ᮁᔍ⦹݅. x*=6 ᭥⊹ᨱᕽ ⱖ=10°ᯙ
᳑Õᨱᕽ۵PW᮹Ğᬑ(H*)aveⴉ1.17, PV_NS᮹Ğᬑ(H*)aveⴉ 1.15, PV_PS᮹Ğᬑ(H*)aveⴉ1.01, PV_VS᮹Ğᬑ(H*)aveⴉ 0.97ಽᇥᕾࡹᨩᮝ໑, ⱖ=30°ᯙ᳑Õᨱᕽ۵PW᮹Ğᬑ(H*)aveⴉ 1.39, PV_NS᮹Ğᬑ(H*)aveⴉ1.30, PV_PS᮹Ğᬑ(H*)aveⴉ 1.09, PV_VS᮹Ğᬑ(H*)aveⴉ1.07ᯕ݅. ᔢݡᮁᙹᝅ⡎ᯕqᗭ⧉
ᨱᮁŖǍ᳑ྜྷᨱ᮹⦽ᗭ❭⬉ŝaR1ᨱእ⧕݅ᗭqᗭ⧉ᮥ
ᙹᯩ݅. ə్ӹĊᄞᯕ᳕ᰍ⦹۵ĞᬑᨱǍ᳑ྜྷᱥ໕ᨱᕽ᮹
ᔢݡ❭Ł۵1.5 ᯕ⦹ಽӹ┡ԍ݅. ྕŖǍ᳑ྜྷŝĊᄞᯕᨧ۵ᮁŖǍ
᳑ྜྷᨱእ⧕Ċᄞᯕᯩ۵ᮁŖǍ᳑ྜྷᯙĞᬑᨱǍ᳑ྜྷᱥ໕ᨱᕽ᮹
ᔢݡ❭Łaԏíӹ┡ԉᮥᙹᯩᮝ໑, ᯕ۵Ǎ᳑ྜྷ᮹ᦩᱶᖒ
ੱ۵ ⧎อ᮹ Łᮁʑ܆ ⪶ᅕ⊂໕ᨱᕽ ᮁญ⦹݅ ⧁ ᙹ ᯩ݅. ᷪ,
ᮁŖǍ᳑ྜྷᯕႊ❭ᱽᨱᱢᬊࢁĞᬑᨱ۵Ǎ᳑ྜྷᱥ໕ᨱᕽ᮹ᔢݡ
❭ŁaԏᮭᮝಽᕽǍ᳑ྜྷᖁ݉ᇡ᮹ᦩᱶᖒ⪶ᅕ॒ᨱᮁญ⦹໑, ᱲᦩᖅᨱ ᱢᬊࢁ Ğᬑᨱ۵ ᖁၶ᮹ ࠺ෝ ᱡq┍ ᙹ ᯩᨕ
⧎อᬕᩢšᱱᨱᕽ ᮁญ⦹݅ ⧁ ᙹ ᯩ݅.
Figs. 9 and 10ᮡbbR1ŝR2᮹᯦ᔍ❭᳑ÕᨱᕽǍ᳑ྜྷ
ᱥ໕ᨱᕽĥ⊂ࡽᇩȽ⊺❭᮹ᜅ⟺✙ౝᮥ᯦ᔍbᄥಽእƱࠥ⦽
äᯕ݅. Fig. 9۵R1 ᯦ᔍ❭᳑Õᨱᕽx*=6.46 ᭥⊹ᨱᕽ᮹ᝅ⨹ᦩ ᄥಽĥ⊂ࡽᜅ⟺✙ౝᮥእƱࠥ⦽äᯕ݅. Fig. 9(a)۵ⱖ=10°ᯙ
ĞᬑಽᕽྕŖǍ᳑ྜྷŝĊᄞᯕᨧ۵ᮁŖǍ᳑ྜྷᝅ⨹ᦩᮡ᯦ᔍ❭
ᜅ⟺✙ౝᨱእ⧕Ⓧíӹ┡ӹḡอĊᄞᯕᯩ۵ᮁŖǍ᳑ྜྷᯙĞᬑ ۵᯦ᔍ❭ᜅ⟺✙ౝᅕ݅ๅᬑ᯲ᮭᮥᙹᯩᮝ໑, ᯕ۵ᔢݡ❭Ła
ԏíĥ⊂ࡽäŝᯝ⊹⦹۵äᯕ݅. ⱖ=30°ᯙĞᬑᯙĞᬑࠥⱖ=10°
᪡ᮁᔍ⦽Ğ⨆ᮥᅕᯕӹ, Ċᄞᯕᯩ۵ᮁŖǍ᳑ྜྷᱥ໕᮹ᜅ⟺✙ౝ
ᯕ ⱖ=10°ᯙ ᳑Õᨱ እ⧕ᕽ۵ Ⓧí ӹ┡ԉᮥ ᙹ ᯩ݅. ᯕ۵
᯦ᔍbᯕ᷾a⧉ᮝಽᯙ⧕ᮁŖǍ᳑ྜྷᨱ᮹⦽ၹᔍ❭a᷾ݡࡹᨩ
Fig. 10. Measured Frequency Spectra by Side Wall Types at x*=5.40 (Test Case : R2, Cw*=0.042). (a) 쩁=10°, (b) 쩁=30°
Fig. 11. Relative wave Heights Along a Wall (x-dir.) by Chamber Width (Test Case : M1 & R1, PV_NS). (a) 쩁=10°, (b) 쩁=30°
Fig. 12. Relative wave Heights Along a Wall (x-dir.) by Chamber Width (Test Case : M2 & R2, PV_NS). (a) 쩁=10°, (b) 쩁=30°
ʑভྙᯕ݅. Fig. 10ᮡR2 ᯦ᔍ❭᳑Õ᮹ᜅ⟺✙ౝᇥᕾđŝಽᕽ
Ǎ᳑⩶ᔢᨱෙ₉ᯕᱱᮥ⪶⦹íᅕᩍᵡ݅. ᷪ, ᮁŖǍ᳑ྜྷᯙ
ĞᬑᨱࠥᮁᙹᝅԕĊᄞ᮹᳕ᰍᮁྕᨱ❭௲᷾⡎᮹ᱡq⬉ŝ aๅᬑⓑ₉ᯕaᯩᮭᮥᙹᯩ݅. Ċᄞᯕ᳕ᰍ⦹۵ᮁŖǍ᳑ྜྷ᮹
ĞᬑᨱࠥĊᄞᯕᮁŖ⩶ᔢᯙĞᬑaྕŖ⩶ᔢᯙĞᬑᨱእ⧕❭௲
ᜅ⟺✙ౝ᮹ Ⓧʑa ᧞e ᯲ᮭᮥ ᙹ ᯩ݅.
Figs. 11 and 12۵Ċᄞᯕᨧ۵ᮁŖǍ᳑ྜྷᮥݡᔢᮝಽȽ⊺❭
(M1 & M2)᪡ ᇩȽ⊺❭(R1 & R2)ෝ ᱢᬊ⦹Ł, ❭௲✚ᖒ ၰ
ᔢݡ ᮁᙹᝅ⡎᮹ ₉ᯕᨱ ෙᔢݡ❭Ł᮹ ᄡ⪵ෝ እƱࠥ⦽
äᯕ݅. đŝᨱᕽᙹᯩ۵ၵ᪡zᯕ❭௲✚ᖒ(Ƚ⊺❭, ᇩȽ⊺❭) ᨱෙ₉ᯕ۵Ñ᮹ӹ┡ӹḡᦫ۵݅. ə్ӹFigs. 11 and 12۵
Ǎ᳑ྜྷᮥෙႊ⨆᮹ᔢݡ❭Łಽᕽʑ᳕ᩑǍᨱ᮹⦹໕Ǎ᳑ྜྷ
Ḣbႊ⨆ᮝಽ᮹₉ᯕ۵ᇥ⯩᳕ᰍ⦽݅. əญŁᔢݡᮁᙹᝅ⡎᮹
₉ᯕᨱෙᗭ❭⬉ŝ᮹₉ᯕࠥ⪶ᯙ⧁ᙹᯩ݅. ᇩȽ⊺❭ෝᱢᬊ⦽
ʑ᳕ ᩑǍᨱ ᮹⦹໕ ❭௲ᯕ Ǎ᳑ྜྷᨱ Ḣbᮝಽ ᯦ᔍ⧁ Ğᬑᨱ
CW*ⴉ0.15 ჵ᭥ᨱᕽ↽ᗭၹᔍᮉᯕӹ┡ӹ۵äᮝಽᱽࡹᨕ
ᯩ݅. Fig. 11ᨱᕽ۵ CW*=0.101ᅕ݅۵ CW*=0.202a ԏᮡ
ᔢݡ❭Łෝᅕᯕ໑, Fig. 12ᨱᕽ۵CW*=0.042ᅕ݅۵CW*= 0.084 a ᅕ݅ ӹᮡ ᗭ❭⬉ŝෝ ᅕᯙ݅.
5. đು
ḢพྕŖǍ᳑ྜྷŝĞᔍ᯦ᔍ❭᮹ᔢ⪙᯲ᬊᨱݡ⧕ᕽ۵݅ᙹ᮹
ᩑǍᯱॅᨱ ᮹⧕ ᙹ⊹⧕ᕾ ၰ ᙹญᝅ⨹ᮥ ☖⧕ ݅᧲⦽ á☁a
ᙹ⧪ࡹᨩᮝӹ, ḢพᮁŖǍ᳑ྜྷᯙĞᬑ۵ᔢݡᱢᮝಽၙ⯂⦽ᝅᱶ ᯕ໑, ᮁŖǍ᳑ྜྷᨱݡ⦽ʑ᳕ᩑǍ۵Ǎ᳑ྜྷᨱḢbᮝಽ᯦ᔍ⦹۵
᳑Õᯙ2₉ᬱᝅ⨹ᮝಽᮁŖǍ᳑ྜྷ᮹ᗭ❭✚ᖒᮥá☁⦽ᩑǍa
ݡᇡᇥᯕᨩ݅. ↽ɝᮁŖǍ᳑ྜྷŝĞᔍ᯦ᔍ❭᪡᮹ᔢ⪙šĥ⧕ᕾ ᨱݡ⦽ᩑǍaᙹ⊹⧕ᕾᮥᯕᬊ⦹ᩍᯝᇡᙹ⧪ࡹŁᯩᮝӹၙ⯂⦽
ᝅᱶᯕ໑, ੱ⦽ᙹญᝅ⨹ᯱഭ᪡᮹እƱෝ☖⦽á☁۵ᝅ⨹ᯱഭ᮹
ᇡ॒᳒ᮝಽᯙ⧕Ñ᮹ᙹ⧪ࡹŁᯩḡᦫ݅. ᕽᅙᩑǍᨱᕽ۵
ḢพᮁŖǍ᳑ྜྷᮥݡᔢᮝಽ Ğᔍ᯦ᔍ❭ԕǍ᳑ྜྷᱥ໕᮹
❭Łෝᙹญᝅ⨹ᮥ☖⧕ĥ⊂⦹Ł, ᱥ໕ᄞᯕᮁŖᄞᯙ᳑Õᨱᕽ
ᮁᙹᝅԕ Ċᄞ᮹ ᮁྕ᪡ Ċᄞ᮹ ⩶ᔢᨱ ෙ ᳑Õŝ ᱥ໕ᄞᯕ
ྕŖᄞᯙ᳑ÕᮥእƱ⦹ᩡ݅. ᅙᝅ⨹đŝ۵ᙹ⊹༉⩶ᮥᯕᬊ⦽
⧕ᕾ᮹ á᷾ᯱഭಽ ⪽ᬊࢁ ᙹ ᯩʑෝ ʑݡ⦹໑, ᅙ ᩑǍಽᇡ░
ᨕḥ đುᮥ ᧞⦹໕ ݅ᮭŝ z݅.
(1) ႊ❭ᱽၰᦩᄞ॒ŝzᮡ⧎อǍ᳑ྜྷᖅĥᮁŖ⩶Ǎ᳑ྜྷᮥ
ᱢᬊ⦹۵ᵝࡽᯕᮁᵲ᮹⦹ӹ۵ᮁŖᇡ᪡ᮁᙹᝅᨱᕽ᮹ᨱթḡ
ᗭ❭⬉ŝෝᯕᬊ⦹ᩍၹᔍ❭ෝᱡq┅ʑ᭥⧉ᯕ໑, Ḣb᯦
ᔍᐱอᦥܩĞᔍ᯦ᔍ❭᳑ÕᨱᕽࠥᮁŖ⩶Ǎ᳑ྜྷᨱ᮹⦽
ᗭ❭⬉ŝෝ⪶ᯙ⧁ᙹᯩᨩ݅. ੱ⦽᯦ᔍbᯕ᯲ᮥᙹಾᗭ❭⬉
ŝ۵ ⓑ äᮝಽ á☁ࡹᨩ݅
(2) Ğᔍ᯦ᔍ❭ԕ, ྕŖǍ᳑ྜྷŝ۵ݍญĊᄞᯕᯩ۵ᮁŖǍ
᳑ྜྷ᮹ Ğᬑᨱ۵ ᱽℕ ᱥ໕ᨱᕽ ԏᮡ ᔢݡ❭Ła ᇥ⡍⧉ᮥ
ᙹᯩᨩᮝ໑, ᅙᩑǍᨱᕽᙹ⧪⦽ᝅ⨹❭᳑Õԕᨱᕽᔢݡ
ᮁᙹᝅ⡎CW*=0.101ᯙĞᬑ۵H*ⴌ1, CW*=0.042ᯙĞᬑ۵
H*ⴌ1.5 ჵ᭥ಽᱽℕᱥ໕᮹❭Łaᇥ⡍⦹ᩡ݅. Ǎ᳑ྜྷᱥ໕ ᨱᕽ❭Łaԏíᇥ⡍⦽݅۵äᮡǍ᳑ྜྷᱡ໕ᇡ᮹ᦩᱶᖒ
⪶ᅕၰ⧎อŁᮁʑ܆⪶ᅕ⊂໕ᨱᕽᮁญ⦹݅⧁ᙹᯩ݅.
(3) ᮁŖǍ᳑ྜྷᯙĞᬑᨱᮁᙹᝅԕĊᄞ᮹᳕ᰍa❭௲ၽݍᮥᨖᱽ
⦹۵ߑๅᬑᵲ⧉ᮥᅕᩡᮝ໑, ᮁᙹᝅԕĊᄞᮡྕŖ⩶ੱ۵
݅ᩕ slit ⩶┽᮹ ᮁŖ⩶ᮥ ᱢᬊ⦹۵ äᯕ ᗭ❭⬉ŝ ᷾ݡᨱ
ᮁญ⧉ᮥ⪶ᯙ⦹ᩡ݅. ᷪ, ᅙᝅ⨹ᮝಽᇡ░ࠥ⇽ࡽđŝᨱ᮹⦹
໕ĊᄞᯕᮁŖ⩶ᯕḡอ݅ᩕslit ⩶┽aᦥܭእƱᱢⓑ⦹ӹ᮹
ᔍb⩶⩶┽ಽᖅĥ⦹۵äᮡ݅ᩕslit ⩶┽ᨱእ⧕Ğᔍ᯦ᔍ❭
᮹ ❭௲᷾⡎ᮥ ᨖᱽ⦹۵ߑ ၙ⯂⧁ äᮝಽ ❱݉ࡽ݅.
qᔍ᮹ɡ
ᅙ םྙᮡ ⦽ǎ⧕᧲ŝ⦺ʑᚁḥ⯆ᬱ᮹ ᩑǍእ ḡᬱ(ŝᱽჩ⪙:
20110131)ᮥၼᦥᙹ⧪ࡽᩑǍᯕ໑, ᩑǍእḡᬱᨱqᔍऽพܩ݅.
