Reduction of the Vibration Transmissibility for the Sea-Water Conveying Pipe in a Ship According to its Mount Shape

(1)

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(2)

䚐䝉㉑SG 㥉㢌⸽SG 㵜㜵㨰 ]_`

㠄OzPG 㣄㷨⪰G 㤴ᵄ䚌⏈G ⵝⷉ㢨G ᴴ㣙G 㦿㫴⬀SG 㫸┍㢌G 㤸␠ᷱ⦐⪰G 㥐㛨䚌⏈G ⵝⷉ⓸G ⬘㟤G 䟜Ḱ㤵㢨␘UG 㢨G ⚀ⱬ㜄G 㣙⽸㢌G 㫸┍㡸G 䟜Ḱ㤵㡰⦐G 㤼㜤䚌⏈G 㜤Ạ☘㢨G ᷸㋁㤵㡰⦐G 㫸䚽╌ḔG 㢼㡰⮤

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Suction Discharge

1st Mount 2nd Mount

Fire Pump

mUG XG wG G G G G

1E-04 1E-03 1E-02 1E-01 1E+00 1E+01 1E+02

1E+01 1E+02 1E+03 1E+04

Frequency[Hz]

Acceleration[m/s2]

On the 1st Mount On the 2nd Mount Base of the pump MIL-Std-740-2(Type 2)

mUG YG XVZG G G G G

G G G G G G

㢨⮤SG 㫸┍G ᷸㽕㡴G 㟤㉔G 䓀䘸㢌G ⫼㟨䏬G ㇵ␜G ⵃG ⵈ␙㜄G ␴䚨㉐G ㍌䚽䚌㜴␘UG mUG Y⏈G 㽕㥉G ᷤḰG XVZG 㝙䇴⽀G ㏘䓍䏬⤰㢨␘UG mUG Y㜄㉐G Y㩅G ⫼㟨䏬G

㇠㟝㡰⦐G 䓀䘸G 㫸┍㢨G ⫼㟨䏬⪰G 䋩Ḱ䚐G 䟸G ⬂㢨G ᵄ㋀╜㡸G ⸰G ㍌G 㢼㡰⇌SG ⵈ␙G 㫸┍㢌G ᷱ㟤G X¥ZUX\o¡㜄㉐G 㝘䢼⥘G 㫑ᴴ╜㡸G 㚀G ㍌G 㢼㛼␘UG 㢨⏈G ⵈ␙G 㫸┍㢨G ␘⪬G ㋀㏘㜄G 㢌䚨G ᴴ㫸╌㛼ᶤ

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┍㢨G _WWo¡¥[o¡㜄㉐G ⬘㟤G 䆰㡸G 㚀G ㍌G 㢼㛼␘UG 䏭䢼G 䢕㢹G ⵤḴ㢌G ᷱ㟤G ᷝ㐘G 䚌⺴⦐⺴䉤G ⵤḴ㢨G

(3)

]`W

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1E-04 1E-03 1E-02 1E-01 1E+00 1E+01 1E+02

1E+01 1E+02 1E+03 1E+04

Frequency[Hz]

Suction Clamp of the suction Base of the clamp for suction MIL-Std-740-2(Type 2)

800Hz~4kHz

mUG ZG XVZG TG G G G

G G G G G G G

1E-04 1E-03 1E-02 1E-01 1E+00 1E+01

1E+01 1E+02 1E+03 1E+04

Frequency[Hz]

Discharge Clamp of the discharge Base of the clamp for discharge MIL-Std-740-2(Type 2)

mUG [G XVZG G G G G G

G G G G G G

ἬG 䟜Ḱ⪰G ⵐ䡌䚌ὤ⏈G 䣌☘G ᶷ㡰⦐G 䑄␜═␘UG ♤

⢰㉐G ⸬G ⊰ⱬ㜄㉐⏈G ⵤḴ㢌G 䟜Ḱ㤵㢬G 㫸┍G 㤼㜤㡸G 㠸䚌㜠G ⫼㟨䏬G 䝉ㇵ㜄G ␴䚐G ⺸㉑㡸G ㍌䚽䚌Ḕ㣄G 䚐

␘UG

ZUG ⫼㟨䏬G 䝉ㇵ㜄G ♤⪬G 㫸┍G 㤸␠⪔

㢰ⵌ㤵㡰⦐G ㉔ⵉG ⇨G ⵤḴ㢌G 㫸┍G 㤼㜤㡸G 㠸䚨㉐G ḔⱨG ⫼㟨䏬ᴴG ⬂㢨G ㇠㟝╌ḔG 㢼␘UG Ḕⱨ⏈G 䇸㉥

ḰG 㥄㉥㡸G ⯜▄G ᴴ㫴ḔG 㢼⏈G 㣠⨀⦐G 㫸┍G 㤼㜤㜄G

≄⫠G ㇠㟝╌ḔG 㢼␘UG 䚌㫴⬀G Ḕⱨ㢌G ᷱ㟤G 䞌ᷱ㤵㢬G 㜵䛙㜄G ♤⢰G ⽸㉔䝉㤵㢬G 䏭㉥㡸G ᴴ㫴ὤG ⚀ⱬ㜄G ḔⱨG ⫼㟨䏬㢌G 㣠㫼㡴G ㉘㾌㦤ᶨ㡸G Ḕ⥘䚌㜠G ㉔㥉

╌㛨㚰G 䚐␘UG 㢨⤠䚐G 㣠㫼G 䏭㉥G 㩅G 㫸┍㤼㜤ḰG Ḵ

⥜䚌㜠G ᴴ㣙G 㩅㟈䚐G 䏭㉥㡴G Ḕⱨ㢌G ᵉ㉥㢨␘UG Ḕ ⱨ㢌G ᵉ㉥㜄G 㜵䛙㡸G 㨰⏈G 㢬㣄⏈G 䞌ᷱ㤵㢬G 㟈㋀㜄G 㢌䚐G ᷱ䞈SG 㚉㻉㜄G 㢌䚐G ⷴ䝉SG 㥐㦤G 㐐G ⵤ䚝㜄G ♤

⪬G ᷱ⓸SG 䝉ㇵ㜄G ♤⪬G 䝉ㇵ㢬㣄G ☥㢨G 㢼␘UG ⸬G ⊰ ⱬ㜄㉐G ␘⨜Ḕ㣄G 䚌⏈G ḔⱨG ⫼㟨䏬㢌G ᷱ䞈SG 㚉㻉G ⵃG ᷱ⓸㜄G ␴䚐G 䟜Ḱ⏈G ⸬G 㜤ẠG 㢨㤸㜄G ␘⨜㛼⒌G 䑀⢰⴬䉤G 㜤ẠOoG G UG YWW_P⪰G 䋩䚨G 㢨⴬G ␘

⨜㛼㛼␘UG ⸬G ⊰ⱬ㜄㉐⏈G 㻈ᴴ㤵㡰⦐G ⫼㟨䏬㢌G 䝉ㇵ㜄G ␴䚐G ᶴ䋔⪰G 䋩䚨G Ḕⱨ⫼㟨䏬㢌G 㫸┍G 㤼㜤G

㉥⏙㡸G 㻈ᴴ㤵㡰⦐G 䛙ㇵ㐐䇘Ḕ㣄G 䚐␘UG

ZUXG ḔⱨG ⫼㟨䏬G 䝉ㇵG ⷴᷱ

ḔⱨᴴG 㚉㻉⥙㡸G ⵏ㡸G ⚀G 䝉ㇵ㜄G ♤⢰G ᵉ㉥㢨G

ⷴ䚐␘UG 㢰ⵌ㤵㡰⦐G 㚉㻉㡸G ⵏ㡸G ⚀G Ḕⱨ㢌G ⺴䖶㢨G 䛼㟝╌⏈G ⮨㤵㢨G 䆨㍌⦑G ᵉ㉥㡴G 㨸㛨☘⮤G 㢨⏈G 㐑OXP¥OYP⦐㒜G ㉘⮹═␘OhG X```SG rzG YWW]PUG 㐑OXP㡴G 㠄䋩G 䝉ㇵ㢌G ḔⱨG ⽈⦑㜄G ␴䚐G ᶽ⸨ὤG 䇸

㉥⪔OhG G G P㢨⮤G ḔⱨG

⫼㟨䏬㢌G 䇸㉥⪔㡴G 㐑OYP㝴G ᵍ㢨G 䣌㡸G ⵏ⏈G ⮨㤵 ḰG ⷴ䝉䚔G ㍌G 㢼⏈G ⮨㤵㢌G ⽸㢬G 䝉ㇵG 㢬㣄OzG

P㜄G ♤⢰G ␠⢰㬄㡸G 㚀G ㍌G 㢼␘U ) (

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4 dl d 4 ʌ d s ʌ

2

) /(

)

( OYP

(4)

䚐䝉㉑SG 㥉㢌⸽SG 㵜㜵㨰 ]`X

㜠ὤ㉐GĘG⏈G 㐐⨀㢌G ᶽ⸨ὤG 䇸㉥⪔SGlG⏈GḔⱨG㣠

⨀㢌GG䇸㉥⪔SGȼG⏈GḔⱨ㢌G㚉㻉᷸㍌SGG⏈G䝉ㇵ㢬㣄 OzGPSGG⏈G㐐⨀㢌G㫵ᷱSGG㡴G㐐⨀㢌GὬ㢨㢨␘U

mUG\⏈G⸬G⊰ⱬ㜄㉐G␘⨜Ḕ㣄G䚌⏈G䚨㍌ⵤḴG⫼㟨䏬GⵃG䆨⣜䘸㢨⮤GmUG]OP⏈Gὤ㦨㜄G㇠㟝䚌ḔG㢼⏈G ⵤḴ㢌GḔⱨG⫼㟨䏬G䝉ㇵ㢨␘UG

ὤ㦨G⫼㟨䏬㢌Gᷱ㟤G㠄䋩㢌G⇨ᷱG⮨㢨G䑀㢨䘸㝴G㥅㸽╌ḔG㞬ᷱG⮨㢨G䆨⣜䘸㝴G㥅㸽╌ὤG⚀ⱬ㜄G⫼㟨䏬㢌G⺴䖶㢨G䛼㟝╌⏈G⮨㤵㡴G▄‌Gⵝ䛙G⮨㤵㡰⦐G⬘

㟤G㤵㡰⮤SG㐑OYP㢌G䝉ㇵ㢬㣄ᴴG䀘㥬Gᶽ⸨ὤG䇸㉥᷸

㍌⏈G㐘㥐G㣠⨀㢌G䇸㉥⪔㜄G⽸䚨G⬘㟤G䀘㫸␘UG♤⢰

㉐G ⫼㟨䏬㢌G ᶽ⸨ὤG 䇸㉥⪔㡸G 㣅᷀G 䚌ὤG 㠸䚨㉐⏈G 䣌㡸G ⵏ⏈G ⮨㤵㡴G 㨸㢨ḔG ⺴䖶㢨G 䛼㟝╌⏈G ⮨㤵㡸G 䇘㟬G䙸㟈ᴴG㢼␘UG㢨⪰G㠸䚨GḔⱨG⫼㟨䏬㜄G㏠⦣G䝉ㇵ㡸G㻈ᴴ䚌㜠GmUG]OP¥OP㝴Gᵍ㢨GⵤḴG⫼㟨䏬⪰G 㜠⤠Gᴴ㫴G䝉ㇵ㡰⦐G⯜⒬⫵G䚌㜴␘UG

Pipe

Mount

Clamp

mUG \G {G G G G G G TG

G

OPG j

OPG jG XG G G G G G G G G G G G G G OPG jG Y

OPG jG ZG G G G G G G G G G G G G G OPG jG [

mUG ]G tG G G G G G G

0 0.5 1 1.5 2 2.5 3 3.5 4

Conventional Case 1 Case 2 Case 3 Case 4

Young's modules[MPa]

Young's modules of the material Apparent modules of elasticity

mUG ^G NG G G G G G G

GGGG G

mUG^㡴GᴵG䝉ㇵ㜄G␴䚐G䝉ㇵ㢬㣄㝴G㢨㜄G♤⪬Gᶽ⸨

ὤG 䇸㉥⪔㡸G 㐑OXP¥OYP⪰G 䋩䚌㜠G ᷸㇤䚐G ᷤḰ㢨␘UG

᷸㇤㡸G 䋩䚨G ⫼㟨䏬㜄G ㏠⦣㡸G 㻈ᴴ䚌㜠G 䣌㡸G ⵏ⏈G

⮨㤵㡴G㨸㢨ḔG⺴䖶㢨G䛼㟝╌⏈G⮨㤵㡸G⏌⥬㡸Gᷱ㟤G

┍㢰䚐GḔⱨG㣠㫼㜄G␴䚨Gᶽ⸨ὤG䇸㉥⪔㢨Gὤ㦨G␴

⽸G㚱GYU\¥ZU\ⵤG㣅㙸㬄㡸G㚀G㍌G㢼㛼␘UG♤⢰㉐G㢨

⤠䚐G㏠⦣G㻈ᴴ⦐G㢬䚨G⫼㟨䏬㢌Gᵉ㉥G㤴ᵄGⵃG㫸┍G 㤸␠⪔G㤴ᵄ㢨Gᴴ⏙䚔Gᶷ㡰⦐G⸨ḔG㢨㜄G␴䚐G⺸㉑㡸G䚨㉑㤵SG㐘䜌㤵㡰⦐G㍌䚽䚌㜴␘UGGG

ZUYG ㍌㾌䚨㉑

⫼㟨䏬G 䝉ㇵ㜄G ♤⪬G ┍㤵G ᵉ㉥G ⷴ䞈⪰G ⸨ὤG 㠸䚨㉐G mUG _ḰG ᵍ㢨G 㡔䚐㟈㋀G ⯜⒬㡸G ⬀☘ḔG ␜㠸G 㢹⥙G 䚌㩅㜄G ␴䚐G ⷴ㠸G ⵃG ᴴ㋁⓸㢌G 㨰䑀㍌G 㢅␩G 䚜㍌⪰G ⫼㟨䏬G 䝉ㇵⷸ⦐G 䚨㉑䚌㜴␘UG 㢰ⵌ㤵㡰⦐G Ḕⱨ⏈G ⽸㉔䝉G 㟈㋀㢨㫴⬀G 㣅㡴G ⷴ䝉G ⇨㜄㉐⏈G 㢨

⪰G ㉔䝉㡰⦐G ⸰G ㍌G 㢼␘UG ♤⢰㉐G ⸬G 㤼㜄㉐㢌G ㍌㾌䚨㉑㡴G Ḕⱨ⪰G ㉔䝉㡰⦐G ᴴ㥉䚌㜠G ㍌䚽䚌㜴␘U

(5)

]`Y

mUG _G mltG G G G G

{G XG tG G G G G

p }

t jyOuPG[\

NGt XUW

wG WU[

kG WUX

䚨㉑㡴G ⺴㇤␴䚍Ẅ㜄㉐G ⸨㡔䚌ḔG 㢼⏈G tzjUu㡸G ᴴ㫴ḔG ㍌䚽䚌㜴␘UG ␜㠸䚌㩅㡴G ⵤḴḰG 㥅㸽╌⏈G ⮨㢌G ⊬☐⪰G ⵤḴG 㩅㐠㥄G ⊬☐㜄G twjOtTG PG 㟈㋀⪰G ㇠㟝䚌㜠G 㜤

ᷤ䚐G 䟸G ⵤḴG 㩅㐠㥄㜄G ㍌㫵ⵝ䛙㡰⦐G ᴴ䚌㜴㡰⮤G ⵤḴG 䆨⣜䘸OjP㝴G 㥅㸽╌⏈G ⮨㡴G 㝸㤸G Ạ㋁

㐐䁤␘UG ❄䚐G ⵤḴG 㩅㐠㥄㜄⏈G 㬅㩅㫼⣽OsG

PG 㟈㋀⪰G ⬀☘ḔG XWG 㫼⣽㡸G 㨰㛼㡰⮤G ḔⱨG 㣠⨀㜄G ␴䚐G Ɒ㉥㾌⏈G {G XḰG ᵍ␘U

mUG `⏈G 䚨㉑G ᷤḰG ⫼㟨䏬G 䝉ㇵⷸG 㨰䑀㍌G 㢅␩G 䏭㉥㢨␘UG mUG `㜄㉐G j㡴G 䆨⣜䚅 OjP㜄G 㢌䚐G 㚉㻉G ⷴ䝉㡸G Ḕ⥘䚌ḔG jyG OuPG ]\㢌G Ḕⱨ㣠㫼㡸G 㤵㟝䚌㜴㡸G ⚀G 㺐㸼G ὤ㦨G ⫼㟨䏬G 䝉ㇵ㜄G ␴䚐G ⷴ㠸G ⵃG ᴴ㋁⓸㢌G 㤸␠

䚜㍌㢨⮤SG jT⏈G ὤ㦨G ⫼㟨䏬G 䝉ㇵ㜄G ␴䚨G 䆨⣜䚅㜄G 㢌䚐G ⷴ䝉㡸G 㥐ᶤ䚌ḔG jyG [\㢌G ḔⱨG 㣠㫼㡸G 㤵㟝䚌㜴㡸G ⚀㜄G ␴䚐G ⷴ㠸G ⵃG ᴴ㋁⓸㢌G 㤸␠䚜㍌㢨␘UG mUG `㝴G ᵍ㢨G 䚨㉑G ᷤḰG

㏠⦣㡸G 㻈ᴴ䚌㜠G 㣄㡔G ⷴ䝉G ⮨㤵㡸G 㫑ᴴ㐐䇘ḔG 䣌㡸G ⵏ⏈G ⮨㤵㡸G 㨸㜴㡸G ᷱ㟤G ᵉ㉥G 㤴ᵄ㡰⦐G 㢬䚨G 㨰䑀㍌G 㢅␩G 䚜㍌ᴴG 㤴㨰䑀G 㯱㡰⦐G 㢨┍䚜㡸G 㚀G

㍌G 㢼㛼␘UG 㢰ⵌ㤵㡰⦐G 㫸┍G 㤸␠⪔㡴G XG 㣄㡔⓸G

⯜⒬㜄G ␴䚨G 㐑OZPḰG ᵍ㢨G ⇌䇴⇰G ㍌G 㢼㡰⮤SG 㢨⪰G 䋩䚨G 䚨㉑G ᷤḰG ⫼㟨䏬G 䝉ㇵG ⷴᷱ㡰⦐G 㢬䚐G Ḕ㡔G 㨰䑀㍌G 㤴ᵄ㢨G 㫸┍G 㤸␠⪔㡸G 㣅᷀G 䚔G ㍌G 㢼㢀㡸G 㜼㽕䚔G ㍌G 㢼␘UG

_{á ć}_×

á ćãÎ à ÞŎîŎ_ƌß^Ïä â ãÏļÞŎîŎ_ƌßä^Ï

ö^ćÎ â ãÏļÞŎîŎ_ƌßä^Ï

G G G G OZP

㜠ὤ㉐G T ⏈G 㫸┍G 㤸␠⪔O{ PSG FT ⏈G 㤸␠⥙SG F0⏈G ᴴ㫸⥙SG쩘G⏈G 㨰䑀㍌OPSG쩘G㡴G Ḕ㡔㨰䑀㍌SG쩅G⏈G ᵄ㌔᷸㍌㢨␘UG

䏭䢼G jG Z㢌G ᷱ㟤ᴴG ᴴ㣙G 䟜Ḱ㤵㢸㡸G 㚀G ㍌G 㢼㛼⏈⒤S 㢨⏈G 㚒㉐G mUG ^㜄㉐⓸G 㜼㽕䚌㜴☣㢨G jG Z㢌G 䝉ㇵ㢨G 䣌㡸G ⵏ⏈G ⮨㤵㢨G ᴴ㣙G 㣅ḔG ⷴ 䝉䚔G ㍌G 㢼⏈G ⮨㤵㢨G ᴴ㣙G 䆠ὤG ⚀ⱬ㜄SG 㪽G 䝉ㇵ

᷸㍌ᴴG ᴴ㣙G 㣅ὤG ⚀ⱬ㢨␘U

0.001 0.01 0.1 1

10 30 50 70 90

Frequency [Hz]

X/F [Compliance]

Conventional Conventional-improved Case 1

Case 2 Case 3 Case 4

OPG y

0.01 0.1 1 10

10 30 50 70 90

Frequency [Hz]

a/F [Accelerance]

Conventional Conventional-improved

Case 1 Case 2

Case 3 Case 4

OPG h

mUG `G m G G G G G

G G G G G G G

G

(6)

䚐䝉㉑SG 㥉㢌⸽SG 㵜㜵㨰 ]`Z [UG 㐘䜌㤵G ᶴ㫑

Z㤼㢌G ᷤḰ⦐⺴䉤G ᴴ㣙G 䟜Ḱ㤵㢨⢰ḔG 㜼ㇵ╌⏈G jG Z㢌G ⫼㟨䏬G 䝉ㇵ㜄G ␴䚨㉐G ㈌䙀㡸G 㥐㣅䚌ḔG 㢨⪰G ⵤḴ㜄G 㤵㟝䚌㜠G 㫸┍㤼㜤G 䟜Ḱ⪰G ὤ㦨G ⫼㟨䏬G 䝉ㇵḰG ᵍ㢨G ⽸Ẅ䚨G ⸨㚌␘U

[UXG 㐘䜌㉿㛹OzP

Z㤼㢌G 䚨㉑G ᷤḰ⪰G ᶴ㫑䚌ὤG 㠸䚨㉐G ⵤḴG ⫼㟨䏬G 䓽ᴴG 㫴ἬOqP⪰G ⬀☘ḔG ⯜␠OtPG 㐐䜌㡸G

㍌䚽䚌㜴␘UG 㐐䜌㡴G mUG XWḰG ᵍ㢨G ⵤḴG 㫴Ἤ㢌G 㹑G _㥄㜄G 㢸䑝䏬G 䚨⭬OpG oP⪰G ㇠㟝䚌㜠G ᴴ㫸䚌ḔG 䆨⣜䘸G ㇵ␜G ⵃG 䚌␜㜄㉐G ᴴ㋁⓸⪰G 㽕㥉䚌⏈G ⵝ㐑㡰⦐G ㍌䚽䚌㜴␘UG 㜠ὤ㉐G 㢸䑝䏬G 䚨

⭬⏈G wjiG { G ]YWWz㡸G ㇠㟝䚌㜴ḔSG ᴴ㋁⓸᷸⏈G k G { G ZX[_k㡸G ㇠㟝䚌㜴㡰⮤G iMr㇠㢌G wGZ\]Wj⪰G䋩䚌㜠G⒤㢨䉤⪰G㍌㬅䚌㜴␘UG㐐䜌㜄㉐㢌G 㨰䑀㍌G ⷈ㠸⏈G XWo¡¥ZUX\o¡ᾀ㫴⦐G ㉘㥉䚌㜴␘U

[UYG 㐘䜌ᷤḰ

mUG XX㡴G 㐘䜌G ᷤḰG _㥄G ᴴ㫸㜄G ␴䚐G 㨰䑀㍌G 㢅 ␩ 䚜㍌ ☘ 㢌 G ⦐ Ἤ G 䓽 ἔ 㢨 ␘ U G 㜠 ὤ ㉐G j㡴G 䆨⣜䚅㜄G 㢌䚐G 㚉㻉G ⷴ䝉㡸G Ḕ⥘

䚌ḔG jyG ]\㢌G Ḕⱨ㣠㫼㡸G 㤵㟝䚼㡸G ⚀G 㺐㸼G ὤ㦨G

⫼㟨䏬G 䝉ㇵ㜄G ␴䚐G ᴴ㋁⓸㢌G 㨰䑀㍌G 㢅␩G 䚜㍌

mUG XWG zG G G G G

OhP㢨ḔSG jTG ⏈G ὤ㦨G ⫼㟨䏬G 䝉ㇵ㜄G ␴䚨G 䆨⣜䚅㜄G 㢌䚐G ⷴ䝉㡸G 㥐ᶤ䚌ḔG jyG [\㢌G Ḕⱨ㣠㫼㡸G 㤵㟝䚐G ᷱ㟤G ᴴ㋁

⓸㢌G 㨰䑀㍌G 㢅␩G 䚜㍌㢨⮤SG w⏈G Z㤼㢌G jG ZG 䝉ㇵ㜄G 䆨⣜䚅㜄G 㢌䚐G ⷴ䝉㡸G 㥐ᶤ䚌ḔG jyG [\㢌G Ḕⱨ㣠㫼㡸G 㤵㟝䚐G ᷱ㟤G ᴴ㋁⓸㢌G 㨰䑀

㍌G 㢅␩G 䚜㍌㢨␘U

mUG XXG ⦐⺴䉤G ⫼㟨䏬㢌G 䝉ㇵG ⷴᷱ㡰⦐G 㢬䚨G 㤸G 㨰䑀㍌G 㜵㜡㜄㉐G 㨰䑀㍌G 㢅␩G 䚜㍌㢌G ⤼ⷜ㢨G 㣅㙸㬄㡸G 䞉㢬䚔G ㍌G 㢼㛼㡰⮤G 㐘䜌G ᷤḰ⪰G 䋩䚨G

⫼㟨䏬G 䝉ㇵG ⷴᷱ㜄G ␴䚐G 㫸┍G 㤸␠⪔G ᵄ㋀㢌G 䚨

㉑㤵G 㜼㽕㡸G ᶴ㫑䚔G ㍌G 㢼㛼␘U

-70 -50 -30 -10 10 30

10 100 1000 10000

Frequency[Hz]

Accelerance[dB, m/s

2

N]

Conventional Conventional-improved Proposed

OPG |G G G G G G

-70 -50 -30 -10 10 30

10 100 1000 10000

Frequency[Hz]

Accelerance [dB , m/s

2

N ]

Conventional Conventional-improved Proposed

G OPG iG G G G G

mUG XXG XVZG G G G G

G G G G G

(7)

]`[

㜠ὤ㉐G 㐘䜌G ⵃG 䚨㉑G ᷤḰ⏈G 㢸䑝䏬G ᴴ㫸⥙㡸G ᴴ 㫴ḔG 䚨㍌G ⵤḴ㢌G 㫸┍G 㤸␠⪔㡸G 䓽ᴴ䚐G ᶷ㢨␘UG 㢨G 䓽ᴴG ⵝⷉ㡴G 㐘㥐⦐G 䚨㍌ᴴG 䢄⪨⏈G 㦤ᶨ㜄㉐㢌G 䓽ᴴG ⵝⷉḰG 㢹⥙G 㦤ᶨG ⵃG ᷸ᷱ㦤ᶨ㢨G ␘⪨␘UG 䚌㫴⬀SG 䚨㍌G ⵤḴ㢌G Ḕ㨰䑀G 㫸┍㢌G ᷱ㟤G 㨰⦐G ḩ┍

䜸ㇵOjP㜄G 㢌䚨G ⵐ㈑䚌⮤G ἬG 㨰䑀㍌G ⷈ㠸 ᴴG ṅ␴㜡OiP㡰⦐G ⵥㇽG 㣕㢀ḰG ᵍ㡴G 䏭

㉥㡸G ᴴ㫴ὤG ⚀ⱬ㜄G 㢸䑝䏬G ᴴ㫸㜄G 㢌䚨G ⵤḴ㢌G 㫸┍G 㤼㜤G ㉥⏙㡸G 䓽ᴴ䚌⏈⒤G 䆤G ⱨ⫠ᴴG 㛺␘ḔG 䑄␜═␘UG ❄䚐G ⵤḴG ⇨㜄G 䚨㍌ᴴG 䢄⪰G ᷱ㟤G 䚨㍌

㜄G 㢌䚐G ⺴ᴴ㫼⣽㢌G 㜵䛙ḰG ⵤḴG ⇨⺴G 㚉⥙㜄G 㢌䚐G ᵉ㉥G 㤴䚌㜄G 㢌䚨G ⵤḴ㢌G Ḕ㡔G 㫸┍㍌ᴴG ␠⢰

㫴ὨG 䚌㫴⬀SG ⸬G ⊰ⱬ㢌G 㟈㥄㡴G ⵤḴ㢨G 㙸⏼⢰G ⫼ 㟨䏬㢨ὤG ⚀ⱬ㜄G 㢨⤠䚐G 㜵䛙㡸G ⱨ㐐䚌⒈⢰⓸G 䆤G ⱨ⫠ᴴG 㛺␘ḔG 䑄␜═␘UG G

\UG ᷤG ⦔

䚨㍌G ⵤḴG ⫼㟨䏬㢌G 䝉ㇵG ⷴᷱ㜄G ␴䚨㉐G 㨰䑀㍌G 㢅␩G 䚜㍌⪰G ᴴ㫴ḔG ⵤḴ㟝G ḔⱨG ⫼㟨䏬㢌G 㫸┍G 㤸␠⪔G 䓽ᴴ⪰G 䚨㉑㤵㡰⦐G ㍌䚽䚐G ᷤḰSG Ḕⱨ⫼㟨䏬G 䖐⮨㜄G ㏠⦣㡸G 㻈ᴴ䚌㜠G 䝉ㇵ㢬㣄⪰G 㨸㢸㡰⦐

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Reduction of the Vibration Transmissibility for the Sea-Water Conveying Pipe in a Ship According to its Mount Shape

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Suction Discharge

1st Mount 2nd Mount

Fire Pump

1 ȕ s

E

E

l

4 dl d 4 ʌ d s ʌ

Pipe

Mount

Clamp

-70 -50 -30 -10 10 30

10 100 1000 10000

Frequency[Hz]

Accelerance[dB, m/s

N]

Conventional Conventional-improved Proposed

-70 -50 -30 -10 10 30

10 100 1000 10000

Frequency[Hz]

Accelerance [dB , m/s

N ]

Conventional Conventional-improved Proposed

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