* v෪ᬱᵝݡ⦺Ʊ ☁༊Ŗ⦺ŝ ᕾᔍ ([email protected]) ** v෪ᬱᵝݡ⦺Ʊ ☁༊Ŗ⦺ŝ ၶᔍŝᱶ ([email protected])
Received December 3 2012, Revised January 27 2013, Accepted May 3 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͵͵ǤͶǤͳ͵ͳ
Ǥ ǤǤ
Phdq#Suriloh#GhswkἺ#ⴲⱧ㬚#⬂⡢㣒㡶#㦪ⵣⴖ#㙾ⴲ⭲0᜶′❊ⴊ#♮ⷓ#
⮮ጪ
෮ுȵกন୍ȵ෴ࢼȵଲ
Hyun, Tak Jib*, Hong, Seong Jae**, Kim, Hyung Bae***, Lee, Seung Woo****
Estimation of Tire-Pavement Noise for Asphalt Pavement by Mean Profile Depth
ABSTRACT
Distress data, IRI, etc. are important factors in the evaluation of pavement condition. Recently, the need to consider tire-pavement noise in PMS (pavement management system) is raised. Generally, tire-pavement noise highly depends on the characteristics of pavement texture. Therefore, estimation of texture characteristics may give useful information to predict tire-pavement noise.
Measurement of MPD (Mean Profile Depth) by using PLP (Portable Laser Profiler) provide very fast. The texture characteristics by means of MPD can be in a short time. hence, It can be a good alternative to give noise information, if MPD and tire-pavement noise have robust relationship. In this study, MPD and tire-pavement noise were simultaneously collected on the number of asphalt section to evaluate the tire-pavement noise due to the pavement texture characteristics. A set of statistical analysis was performed to propose relationship between tire-pavement noise and MPD for asphalt concrete pavement.
Key words : MPD (Mean Profile Depth), PLP (Portable Laser Profiler), Tire-pavement noise
Ⅹಾ
⡍ᰆ❭ᗱŝIRI ॒᮹ᗭॅᮡ⡍ᰆᔢ┽ෝ⠪a⦹۵ᵲ⦽ᗭᯕ݅. ↽ɝॅᨕᵝ⧪⏭ᱢᖒᨱᩢ⨆ᮥᵝ۵┡ᯕᨕ-י໕ᗭᮭᮥ⡍ᰆšญᜅ
▽ᨱ⡍⧉┅۵⦥ᖒᯕݡࢱࡹŁᯩ݅. PLP(Portable Laser Profiler)ෝᯕᬊ⦹ᩍᵝ⧪ᵲי໕᳑Ḣ✚ᖒᯙ⠪Ɂ⥥ಽ❭ᯝʫᯕ(MPD)ෝ⊂
ᱶ⧁ᙹᯩ۵ʑჶᯕ}ၽࡹᨩ݅. ᯝၹᱢᮝಽ┡ᯕᨕ-י໕ᗭᮭᮡי໕᳑Ḣ✚ᖒᨱ݅íၽᔾ⦹໑, ┡ᯕᨕ-י໕ᗭᮭᮥᩩ⊂⦹۵ᮁᬊ⦽ᱶ ᅕಽᔍᬊ⧁ᙹᯩ݅. ᅙᩑǍᨱᕽ۵ᦥᜅ❵✙Ǎe᮹י໕᳑Ḣ✚ᖒᨱෙ┡ᯕᨕ-י໕ᗭᮭᮥ⠪a⦹ʑ᭥⧕݅ᙹ᮹ᦥᜅ❵✙ǍeᨱᕽMPD
᪡┡ᯕᨕ-י໕ᗭᮭᮥ࠺ᨱ⊂ᱶ⦹ᩍߑᯕ░ෝ⫮ा⦹ᩡᮝ໑, ☖ĥ⦺ᱢᇥᕾᮥ☖⧕┡ᯕᨕ-י໕ᗭᮭ⇵ᱶᮥᱽᦩ⦹ᩡ݅.
áᔪᨕ MPD(⠪Ɂ⥥ಽ❭ᯝʫᯕ), PLP(⡍░ት౩ᯕᱡ⥥ಽ❭ᯝ్), ┡ᯕᨕ-י໕ᗭᮭ
1. ᕽು
ᦥᜅ❵✙⡍ᰆᮡŖᬊ֥ᙹa᷾a⧉ᨱי⬥⪵aḥ⧪ࡹŁ⡍✙⪡, ్❦, Ɂᩕ॒Ǎ᳑ᱢᯙ❭ᗱᐱอᦥܩי໕ษ༉ಽᯙ⦽
ʪͿėॡFig. 1. Pavement Surface Characteristic Classifications and Their Impact on Pavement Performance Measures (ACPA, 2006a)
(a) MTD
(b) MPD (Flintsch et al., 2003) Fig. 2. Definition of MTD and MPD
ࠥಽ᮹ၙҥౝᱡ⧎qᗭ॒ࠥಽ᮹ʑ܆ᖒᗱᝅᮥⅩ௹⦹Łᯩ݅.
⡍ᰆ᮹Ŗᬊᖒ܆ᯕᱡ⦹ࡹ۵ᬱᯙၰĞ⨆ᮡᵲᰆʑᱢᯙ༉ܩ░ย
ᮥ☖⦹ᩍ❭ᦦࢁᙹᯩᮝ໑, ᯕෝ☖⧕⡍ᰆŖᬊᖒᩩ⊂༉⩶
ၰᙹᵝʑእᬊᇥᕾᨱ⦥⦽᯦ಆᄡᙹ᮹ᖁᱶᯕa܆⦹݅.
ᯝၹᱢᮝಽ⡍ᰆŖᬊᖒᩩ⊂༉⩶ᨱ⦥⦽᯦ಆᗭಽ۵⡍ᰆי ໕᮹❭ᗱ, ⠪┥ᖒ, ၙҥౝᱡ⧎॒݅᧲⦽ᗭॅᯕᔍᬊࡽ݅. ᵝ⧪
⏭ᱢᖒᨱᵲ⦽ᩢ⨆ᮥᵝ۵┡ᯕᨕ-י໕ᗭᮭᨱݡ⦽Ḣᱲᱢᯙ
⠪a۵⩥ᰍʭḡ⡍ᰆšญ ᜅ▽ᨱℕĥᱢᮝಽၹᩢࡹŁᯩḡ
ᦫ݅.
ᯝၹᱢᮝಽ┡ᯕᨕ-י໕ᗭᮭᮡי໕᳑Ḣ✚ᖒ᮹ᩢ⨆ᮥၼ۵
äᮝಽಅᲙᯩ݅. ᯕ్⦽י໕᳑Ḣ✚ᖒᮥ݉eᨱ⪶ᅕ⦹ᩍ
ᇥᕾ⦽݅໕ࠥಽ⡍ᰆ᮹Ŗᬊᖒ⠪a༉ܩ░ยᮥ᭥⦽ᳬᮡᱶᅕa
ࡽ݅. ᅙᩑǍᨱᕽ۵ᦥᜅ❵✙⡍ᰆǍeᨱᕽၽᔾ⦹۵┡ᯕᨕ-י ໕ᗭᮭᮥᝅeᮝಽ⠪a⦹ʑ᭥⦽ႊᦩᮝಽᵝ⧪ᵲי໕᳑Ḣ
✚ᖒ ᱶᅕa ⫮ा a܆⦽ PLPෝ ☖⦹ᩍ ⊂ᱶࡽ MPD(Mean Profile Depth) ߑᯕ░ෝᯕᬊ⦹ᩍ┡ᯕᨕ-י໕ᗭᮭᮥ⇵ᱶ⦹۵
äᮥ༊⢽ಽ⦽݅. ┡ᯕᨕ-י໕ᗭᮭ⇵ᱶᔑᱶᮥ᭥⧕ᵲᇡԕය
⨹ࠥಽ, ࠺⧕Łᗮࠥಽ(ᇢv෪ICⴇԉv෪IC), ǎࠥ35⪙ᖁ(ᖒᔑ ⴇ᪶ᔑ)ᨱᕽMPD ၰ┡ᯕᨕ-י໕ᗭᮭᮥ࠺ᨱ⊂ᱶ⦹ᩍ619}
᮹ߑᯕ░ෝ⫮ा⦹ᩡᮝ໑, ☖ĥ⦺ᱢᇥᕾᮥ☖⧕ᔢšᖒ׳ᮡ
đŝa ࠥ⇽ࡹᨩ݅.
2. ࠥಽי໕᳑Ḣၰ┡ᯕᨕ-י໕ᗭᮭ✚ᖒ
2.1 ڋבଲন
ᯝၹᱢᮝಽי໕᳑Ḣ᮹✚ᖒᮡMicrotexture, Macrotexture, Megatexture, Roughness ᮹ჵ᭥ᨱᱶ᮹ࡹ໑, ࠥಽי໕ᨱᕽ
י໕᳑Ḣ᮹✚ᖒᨱFigure 1ŝzᯕษₑಆ, ┡ᯕᨕ-י໕ᗭᮭ, Splash ᪡Spray, ┡ᯕᨕษ༉, Ǎᱡ⧎, ₉q॒ࠥಽ᮹ʑ܆ᖒ
ᨱᩢ⨆ᮥᵡ݅(Shakir Shatnawi, 2007). ❭ᰆ0.001ⴇ0.5mm᮹
ᙹḢ ʫᯕ 0.2mm ᯕ⦹᮹ Microtexture᪡ ❭ᰆ 0.5ⴇ51mm᪡
ᙹḢʫᯕ0.1ⴇ20mm᮹Macrotextureᩢᩎᔍᯕᨱ᳕ᰍ⦹۵ᦥ⥥
❵✙⡍ᰆ᮹י໕᳑Ḣᮡ┡ᯕᨕ᪡Ḣᱲᱢᯙᔢ⪙᯲ᬊᮝಽᯙ⦹ᩍ
ၽᔾ⦹۵┡ᯕᨕ-י໕ᗭᮭŝʫᮡšಉᯕᯩ۵äᮝಽಅᲙᯩ݅.
ษₑಆqᗭಽᯙ⦽Ʊ☖ᔍŁෝ↽ᗭ⪵⧁ᙹᯩࠥಾ⡍ᰆ⢽໕ᮡ
∊ᇥ⦽ษₑಆŝ႑ᙹᖒ܆ᮥaᲙ⦹໑, ᯕ్⦽⡍ᰆ᮹⢽໕
ษₑಆᮡ⢽໕᳑Õ(eɚ, ษ༉, ʼnᰍ⩶┽, ʼnᰍᇥ⡍) ၰ⪹Ğᱢᯙ
ᯙᨱ᮹⧕đᱶࡹ໑(Panagouli and Kokkalis, 1998), ∊ᇥ⦽
ၙҥౝᱡ⧎ᖒŝי໕᳑Ḣᮥaḡࠥಾ⢽⊖ᮥᖅĥ⦹Łšญ⦹۵
äᯕᮅᔢ┽᮹ࠥಽᵝ⧪Ʊ☖ᔍŁෝᵥᯕ۵ႊჶᯕࢁᙹ
ᯩ݅(Hass et al., 1994).
2.1.1 MTDMPDଭ୨ଭࢫ౸୨էրଭण֗
ᯝၹᱢᮝಽ י໕᳑Ḣ᮹ ⠪Ɂʫᯕ ᔑ⇽ ႊჶᮝಽ SPT(Sand Patch Test, ASTM E-965)ෝᯕᬊ⦽MTD(Mean Texture Depth)
᪡PLPෝMPDaᯩ݅. MTD᮹ĞᬑFigure 2(a)᪡zᯕי໕᳑Ḣ
᮹⠪ɁᱢᯙᙹḢ׳ᯕ᮹₉᮹⠪Ɂᮝಽᱶ᮹⦹໑, ᯝၹᱢᮝಽSPT
(a) Sand Patch Tester (b) Sand Patch Test Method Fig. 3. Collection of MTD Using the Sand Patch Tester (Hoerner and Smith, 2002)
(a) Principle of MPD Test (b) MPD Measurement Using Portable Laser Profiler Fig. 4. Measurement Principle of MPD Test Using Portable Laser Profiler (Budras, 2001)
ෝᯕᬊ⦹ᩍי໕᳑Ḣᱶᅕෝ⫮ा⦽݅. ၹ໕ᨱPLPෝᯕᬊ⦽MPD ᔑᱶ᮹ĞᬑFigure 2(b)᪡zᯕ1mmeĊᮝಽ⊂ᱶࡽי໕᳑Ḣ᮹
⠪Ɂʫᯕߑᯕ░ෝ⊂ᱶÑญ100mmᵲℌჩṙಽ׳ᮡs(peak level 1st)ŝࢱჩṙ׳ᮡs(peak level 2nd)ᮥ⠪Ɂ⦹ᩍ100mm ᨱᕽ᮹⥥ಽ❭ᯝ⠪Ɂŝࢱ}᮹׳ᮡsᮥ⠪Ɂ⦽s᮹₉ᯕಽ
ᱶ᮹⦽݅.
MTD ෝ ᱶపᱢᮝಽ ᔑᱶ⦹ʑ ᭥⦽ ႊჶᮝಽ۵ Figure 3ŝ
zᯕ SPTෝ ᯕᬊ⦹໑, ʑᅙ ᬱญ۵ ʼnᰍ᪡ ʼnᰍᔍᯕ᮹ eɚ᮹
ℕᱢᮥᔑ⇽⦹۵äᮝಽℕaႊჶᨱ᮹⦹ᩍNo.50 ℕෝ90%
☖ŝ⦹ŁNo.100 ℕᨱ100% ඹ⦹۵Łᬕ༉௹25cm
3ᯕᔢᮥ
ᔍᬊ⦹ᩍ⡍ᰆ⢽໕ᨱɁḩ⦹íeɚᮥ₥ᬕ⬥⠝ℱḥ໕ᱢᮝಽ
ӹ٥ᨕᔑᱶ⦹۵ႊჶᯕ݅. ə్ӹSPTᨱ᮹⦽MTD ᔑᱶ᮹Ğᬑ
ᵝ⧪ᵲᯙࠥಽᨱᕽᝅ⨹ᮥᙹ⧪⧁ᙹᨧŁ, ߑᯕ░⪶ᅕෝ᭥⧕
Ʊ☖☖ᱽa⦥⦹໑, ߑᯕ░⪶ᅕෝ᭥⧕eᯕฯᯕᗭ༉ࡽ݅۵
݉ᱱᯕᯩ݅. SPTᨱ᮹⦽י໕᮹⠪Ɂ⢽໕᳑Ḣʫᯕ۵(1)ŝ
zᯕ ᔑ⇽⦽݅.
¦á ć ņ
Ïѯ (1)
D = ༉௹ᝅฑ ḢĞ, V = ༉௹᮹ ᇡ⦝ ݉᭥ : mm
MPDෝ⊂ᱶ⦹ʑ᭥⧕PLPෝᯕᬊ⦹ᩍ⊂ᱶ⦹۵ႊჶᯕᯩ݅.
MPD ෝ ᔑ⇽⦹۵ ᰆእ᮹ ✚Ḷᮡ ᝅ⨹₉పᨱ ┲ᰍࡽ PLPᨱᕽ
ႊ⇽⦹۵Laseraࠥಽי໕ᨱᕽၹᔍࡹᨕ࠭ᦥ᪅۵eᮥ⊂ᱶ⦹
ᩍ᳑Ḣʫᯕಽᔑ⇽⦽݅. MPD۵1mm eĊᮝಽ⊂ᱶࡽmacro- texture ߑᯕ░ෝFigure 4᪡zᯕ⥥ಽ❭ᯝʫᯕ(Profile Depth)ෝ
⊂ᱶ⦹ᩍ100mm ᵲᨱℌჩṙಽ׳ᮡs(peak level 1st)ŝࢱ
ჩṙ ׳ᮡ s(peak leve 2nd)᮹ sᮥ ⠪Ɂ⦹ᩍ 100mmᨱᕽ᮹
⥥ಽ❭ᯝ⠪Ɂŝࢱ}᮹׳ᮡsᮥ⠪Ɂ⦽s᮹₉ಽᔑᱶ⦹໑,
Fig. 5. Correlation of MPD and MTD (Lee, 2012)
Fig. 6. Tire-Pavement Noise by Air Pumping (Rasmussen and Bernhard, 2007)
ᝅ⨹₉పᯕᵝ⧪ᵲᨱ⠪Ɂי໕᳑Ḣʫᯕෝ⊂ᱶ⦹ᩍƱ☖☖ᱽa
Ǎࡹḡᦫᦥeᱢᱽ᧞ᯕᨧʑভྙᨱMPDaMTDᨱእ⧕
⬉ᮉᱢᯕŁ ❱݉ࡽ݅. PLPෝ ᯕᬊ⦽ MPD ᔑᱶᮡ ݅ᮭŝ
z݅.
¦©á Þ©ƃſƉ¥ƃƔƃƊ ÎƑƒß â Þ©ƃſƉ¥ƃƔƃƊ ÏƌƂß Ï
à ƔƃƐſƅƃ ¥ƃƔƃƊ (2)
MPD ᪡MTD۵⠪Ɂי໕᳑Ḣʫᯕෝᔑᱶ⦹۵༊⢽۵zᮝӹ
ᱶ᮹᪡ᔑᱶႊჶᯕ݅ʑভྙᨱ⠪Ɂי໕᳑Ḣʫᯕ⊂ᱶ⊹a݅
íӹ┡ӽ݅. }ֱᱢᮝಽ۵MTDaMPDᨱእ⧕⠪Ɂי໕᳑Ḣ ʫᯕ✚ᖒᮥ❭ᦦ⦹۵ߑ⧊ญᱢᯕӹƱ☖☖ᱽa⦥⦹໑, ߑᯕ░
⪶ᅕෝ᭥⦽eᯕฯᯕᗭࡹ۵݉ᱱভྙᨱMPD ⊂ᱶ⊹ෝ
ᯕᬊ⦹ᩍMTDෝ⇵ᱶ⦹۵äᯕ⦥⦹݅. ᯕᬑ(2012)᮹ᩑǍ ᨱᕽ۵PLPෝᯕᬊ⦽MPD ߑᯕ░a⧊ญᱢᮝಽ⊂ᱶࡹᨩ۵ḡෝ
⪶ᯙ⦹ʑ᭥⦹ᩍᵲᇡԕය⨹ࠥಽၰ݅ᙹ᮹ᦥᜅ❵✙Ǎeᨱᕽ
⫮ा⦽ MPD ߑᯕ░᪡ SPTෝ ☖⦽ MTD ߑᯕ░᮹ ᔢššĥ
ᇥᕾᮥ ᙹ⧪⦹ᩡ݅. ᔢššĥ ᇥᕾ đŝ۵ Figure 5᪡ zᮝ໑, MPD ᪡ MTD᮹ ᔢššĥ۵ (3)ŝ zᯕ ࠥ⇽ࡹᨩ݅.
MPD (AP) = 0.92 × MTD + 0.21, R
2= 0.51, P-value = 0 (3)
ᵲᇡԕය⨹ࠥಽၰ݅ᙹ᮹ᦥᜅ❵✙Ǎeᨱᕽ⊂ᱶࡽMPD ߑᯕ░᪡MTD ߑᯕ░ෝ⪽ᬊ⦹ᩍᔢššĥᇥᕾᮥᙹ⧪⦹ᩡŁ, đᱶĥᙹa0.51, ᮁ᮹⪶ශᯕ0ᮝಽᔑᱶࡽäᮝಽᅕᦥ☖ĥ⦺ᱢ ᮝಽ ᇥ⦽ ᔢššĥa ᯩ۵ äᮝಽ ❱݉ࡽ݅. ᕽ PLPෝ
ᯕᬊ⦽MPD ⊂ᱶߑᯕ░a⠪Ɂי໕᳑Ḣʫᯕෝ⊂ᱶ⦹۵⧊ญᱢ ᯙ ႊჶᯕŁ ❱݉ࡽ݅.
2.2 ଲઘ-ڋীଣনࢫ౸୨ࢺੲ 2.2.1 ଲઘ-ڋীଣন
┡ᯕᨕ-י໕ᗭᮭ᮹ᬱᯙᮝಽ۵┡ᯕᨕḥ࠺ᨱ᮹⦽ᗭᮭ, air pumpingᨱ᮹⦽ᗭᮭ, ⦝⊹ᗭᮭᮝಽǍᇥࡽ݅. ᗭᮭᬱᵲᨱᕽair pumping ᨱ᮹⧕ၽᔾ⦹۵ᗭᮭᮡFigure 6ŝzᯕ₉పᯕŁᗮᮝ ಽᵝ⧪⧁ভ, ┡ᯕᨕ✙౩ऽ᮹əቭӹࠥಽ⢽໕᮹⪩ᗮᮝಽ
Ŗʑaᦶ⇶ᯕࡹ໕ᕽh⯩íࡹŁ⪩ᯕᩕตভɪĊ⯩Ŗʑᦶᯕ
ᇡಽႊ⇽ ࡹ໕ᕽ ᗭᮭᯕᮁၽ⦹í ࡹ۵ߑ ᯕ᪡zᮡ ŝᱶᯕ
ḡᗮࢁĞᬑ┡ᯕᨕ-י໕ᗭᮭᯕၽᔾࡽ݅. air pumpingᨱ᮹⦽
┡ᯕᨕ-י໕ᗭᮭ᮹ ၽᔾ ᵝ❭ᙹ ჵ᭥۵ ᧞ 800Hzⴇ2500Hzಽ
׳ᮡᵝ❭ᙹჵ᭥ᨱᕽմíᇥ⡍ࡹ໑, ᵝ⧪ᵲၽᔾ⦹۵┡ᯕᨕ-י ໕ᗭᮭᵲᵝࡽᯙᯱಽ❱݉ࡽ݅(Han, 2007). ੱ⦽air pumpingᨱ
᮹⦽ ┡ᯕᨕ-י໕ᗭᮭᮡ י໕᳑Ḣ ʫᯕ᪡ ʫᮡ šಉᯕ ᯩ݅.
Hanson and NeSmith (2004)᮹ ᩑǍᨱ ᮹⦹໕ Figure 7ŝ
zᯕʼnᰍ᪡ʼnᰍᔍᯕ᮹Ŗɚᮉŝ, ⡍ᰆᰍಚ॒ᯕᦥᜅ❵✙⡍ᰆᨱ ᕽ┡ᯕᨕ-י໕ᗭᮭᨱᵲ⦽ᩢ⨆ᮥᵡ݅. Ŗɚශᯕ᷾a⧁ᙹಾ
┡ᯕᨕ✙౩ऽӹࠥಽ⢽໕᮹⪩ᗮᮝಽh⯩íࡹ۵Ŗʑ᮹᧲ᯕ
qᗭ⦹ᩍ┡ᯕᨕ-י໕ᗭᮭᮡqᗭ⦹໑, ᰍಚᯕ᷾a⧁ᙹಾʼnᰍ
฿ྜྷฝqᗭᨱෙʼnᰍ┩ญ⩥ᔢᮝಽᯙ⦽י໕᳑Ḣʫᯕ᷾aಽ
┡ᯕᨕ-י໕ᗭᮭᯕ ᷾a⦽݅Ł ၾ⩵݅.
2.2.2 ଲઘ-ڋীଣ౸୨ࢺੲ
ᵝ⧪₉ప᮹┡ᯕᨕᨱɝᱲ⧕ᕽᗭᮭᮥ⊂ᱶ⦹۵ႊჶᮝಽISO/
CD 11819-1(1997) Ƚᱶᨱᕽ۵✙౩ᯝ్ᰆእෝᔍᬊ⦽⊂ᱶჶᮥ
ᱽ⦹Łᯩ݅. ✙౩ᯝ్ԕᨱษᯕⓍಽ⡑ᮥᖅ⊹⦹ᩍ₉పᨱᕽ
ၽᔾ⦹۵ᨵḥ, ႑ʑ॒᮹ᗭᮭᮥ↽ᗭ⪵⦹ᩍ┡ᯕᨕ-י໕ᗭᮭᮥ
⊂ᱶ⦹۵ႊჶᯕ݅. ᵝ⧪₉పᨱᕽၽᔾ⦹۵ᗭᮭᮡᱡᗮᯝĞᬑ,
ᨵḥ॒᮹ʑĥᱢᯙᗭᮭᯕᱥℕᗭᮭᨱᕽⓑእᵲᮥ₉ḡ⦹໑,
Łᗮᮝಽ ᵝ⧪⧁ᙹಾ ┡ᯕᨕ-י໕ᨱᕽ ၽᔾ⦹۵ ᗭᮭ᮹ እᵲᯕ
(a) Effect of Air Void on Tire-Pavement Noise (b) Effect of Age of Tire-Pavement Noise Fig. 7. Characteristics of Tire-Pavement Noise (Hanson and NeSmith, 2004)
(a) Principle of CPX Method (Hanson et al., 2004) (b) CPX-Trailer (Leeuwen et al., 2007) Fig. 8. Measurement of Tire-Pavement Noise using CPX
Fig. 9. Equipment of Tire-Pavement Noise
᷾a⦹íࡽ݅. ᕽɝᱲᗭᮭ⊂ᱶჶ(CPX ; Close Proximity)
ᮡ⡍ᰆ໕ᨱෙᗭᮭၽᔾᱶࠥෝ⠪a⧁Ğᬑ, ԏᮡᗮࠥ᪡
׳ᮡᗮࠥෝ༉ࢱእƱ⧁ᙹᯩ۵ႊჶᯕ݅. Figure 8ᮡCPX᮹
ᬱญෝ ᖅ⦽݅.
ᅙᩑǍᨱᕽ۵ᵲᇡԕය⨹ࠥಽၰ݅ᙹ᮹ᦥᜅ❵✙Ǎeᨱᕽ
┡ᯕᨕ-י໕ᗭᮭᮥ⊂ᱶ⦹ʑ᭥⧕ᗭᮭ⊂ᱶᰆእෝ}ၽ⦹ᩡ݅.
Microphone 2 }ෝᯕᬊ⦹ᩍᮭᦶᮥ⊂ᱶ⦹ʑভྙᨱCPXႊჶ᮹
┡ᯕᨕ-י໕ᗭᮭ ⊂ᱶ ᭥⊹᪡ ࠺ᯝ ᭥⊹ᨱᕽ ⊂ᱶ⦹ᩡ݅. ੱ⦽
┡ᯕᨕ-י໕ᗭᮭ⊂ᱶᝅ⨹ᮥ᭥⦽ḡə۵Figure 9᪡zᮝ໑, ᝅ⨹₉ప᮹ ၵ⒕⇶ᨱ ┩ᇡ₊ᯕ ᬊᯕ⦹ࠥಾ ᱽ᯲⦹ᩡ݅.
3. י໕᳑Ḣʫᯕၰ┡ᯕᨕ-י໕ᗭᮭ⊂ᱶ
3.1 MPDଲઘ-ڋীଣଭঃււծंজଡ֜
ԩট୨
MPD᪡┡ᯕᨕ-י໕ᗭᮭ᮹ᔢššĥᇥᕾᮥ᭥⧕ᵲᇡԕයŁ ᗮࠥಽᨱ᭥⊹⦽⨹ࠥಽၰŁᗮࠥಽ᮹ᦥᜅ❵✙ǍeᨱᕽPLP
ෝᯕᬊ⦽ MPD ⊂ᱶၰ┡ᯕᨕ-י໕ᗭᮭ⊂ᱶᮥᙹ⧪⦹ᩡ݅. MPD ၰ┡ᯕᨕ-י໕ᗭᮭ⊂ᱶᝅ⨹ᮡᵝᄡᦵᗭᮭᮝಽᇡ░᮹ᩢ⨆ᮥ
↽ᗭ⪵┅Łᝅ⨹ᯱ᮹ᦩᱥᮥ᭥⧕2₉ಽᬑ⊂⮁➉ᜅǍeᨱᕽ
ᝅ⦹ᩡ݅. MPD᪡┡ᯕᨕ-י໕ᗭᮭᔢššĥᇥᕾᮥ᭥⦽ߑᯕ
░ ᙹḲ Ǎeᮡ Table 1ŝ z݅.
Table 1. Test Section for Collection of MPD and Tire-Pavement Noise
Road Routes Location Construction
Central Inland Test Road YeoJu JC GGamGok IC 2011 DongHae Expressway S. Gangnenung IC G
N. Gangnenung IC 2001 National Highway 35 Line SungSan GWangSan 2010
Fig. 10. Procedure for MPD Calculation
Fig. 11. Procedure for Tire-Pavement Noise Calculation
3.2 ڋבଲࢫଲઘ-ڋীଣ౸୨
PLPෝᯕᬊ⦽MPD ߑᯕ░۵Figure 10ŝzᮡŝᱶᮥ☖⧕
⫮ाࡽ݅. ᝅ⨹₉పᮥ80km/hಽᯝᱶ⦹íᮁḡ┉⬥PLPᨱᕽ
ႊ⇽ࡹ۵Laseraࠥಽי໕ᨱᕽၹᔍࡹᨕ࠭ᦥ᪅۵eᮥ⊂ᱶ
⦹ᩍᙹḲࡽי໕᳑Ḣᱶᅕෝmain softwareᨱᱥᘂ⦽݅. MPD
ᙹḲࡽי໕᳑Ḣʫᯕߑᯕ░۵softwareᨱᕽᯱ࠺ᮝಽ100mm eĊᮝಽӹ٥ᨕ1}᮹MPD ߑᯕ░ಽᔑᱶ⦹໑, 100mmษ݅
ᔑᱶࡽMPD 1}᮹ߑᯕ░ෝ⠙ญ⦹í⪶ᯙ⧁ᙹᯩࠥಾ⥥ಽəఉ
ᮥ ☖⧕ MPD ߑᯕ░ෝ Ǎ⇶⦽݅.
┡ᯕᨕ-י໕ᗭᮭߑᯕ░⊂ᱶᮡFigure 11ŝzᮡŝᱶᮥ☖⧕
⫮ाࡽ݅. ᝅ⨹₉పᮥ80km/hಽᯝᱶ⦹íᮁḡ┉⬥┡ᯕᨕ
᪡י໕ᔍᯕᨱᕽၽᔾ⦹۵ᗭᮭᮥ⊂ᱶ⦹ᩍmain softwareᨱᱥᘂ
⦽݅. ᙹḲࡽ┡ᯕᨕ-י໕ᗭᮭᮡ1/10Ⅹᨱ1}ᦊߑᯕ░aᔑᱶࡹ
໑, 1/10Ⅹᨱ1}ᦊᔑᱶࡽ┡ᯕᨕ-י໕ᗭᮭߑᯕ░ෝ⪶ᯙ⦹ʑ
᭥⧕⥥ಽəఉᮥ☖⧕┡ᯕᨕ-י໕ᗭᮭߑᯕ░ෝǍ⇶⦽݅. ┡ᯕᨕ - י໕ᗭᮭ ߑᯕ░ ⊂ᱶ microphone 2}ෝ ᔍᬊ⦹໑, ᯝšᖒ
ᯩ۵ߑᯕ░ෝ⫮ा⦹ʑ᭥⧕┡ᯕᨕᦿ· घᇡᇥᨱᕽ⫮ा⦽2aḡ
ߑᯕ░ෝ ⠪Ɂ⦹ᩍ 1}᮹ ┡ᯕᨕ-י໕ᗭᮭ ߑᯕ░ಽ ᔑ⇽⦽݅.
Fig. 12. Data Correlation Method of MPD and Tire-Pavement Noise
Fig. 13. Correlation of MPD and Tire-Pavement Noise