ᮾᛴᘓタᢏ⾡◊✲ᡤሗ No.41 U.D.C 534.2
⯒ࡀᅛయ㡢㡿ᇦࡢື ᐃ⤖ᯝ࠼ࡿᙳ㡪ࡢ
ᐇ㦂ⓗ࣭ᩘ್ゎᯒⓗ᳨ウ
℩ᡞᒣ ㍤
㸨 せ ⣙㸸 㕲㐨➼ࡽࡢᅛయ㡢ᑐ⟇ࢆ᳨ウࡍࡿ࠶ࡓࡗ࡚ࡣ㸪ᘓ≀ᕤ๓ᩜᆅ⾲㠃࡛ື ᐃࡀ⾜ࢃࢀࡿࠋࡋࡋ㸪≉㒔ᕷ㒊࠾࠸ ࡚㸪ᘓ≀ᕤ๓ࡢᩜᆅࡣ⯒ࡉࢀ㥔㌴ሙ➼⏝ࡉࢀ࡚࠸ࡿࡀከ࠸ࠋ⯒ࡣᆅ⾲㠃ࢆᗈࡃそ࠺ࡇࡽᆅ⾲㠃ࡢືࡁ ࡞ᙳ㡪ࢆཬࡰࡍணࡉࢀ㸪ື ᐃ⤖ᯝࢆ⏝ࡍࡿ࠶ࡓࡗ࡚ࡣࡑࡢᙳ㡪ࢆᐃ㔞ⓗ▱ࡿࡇࡀ㔜せ࡛࠶ࡿࠋ ࡑࡇ࡛ᮏㄽᩥ࡛ࡣ㸪ᐇ⌧ሙ࠾ࡅࡿ⯒ࡢᙳ㡪ࡢ ᐃࢆ♧ࡋ㸪ࡉࡽ㸪᭷㝈せ⣲ἲࡼࡿᩘ್ゎᯒࢆ⏝࠸࡚⯒ࡢᙳ㡪ࢆ ᳨ウࡋࡓࠋせ࡞⤖ᯝࡣ௨ୗࡢ㏻ࡾ࡛࠶ࡿࠋỈᖹ᪉ྥືࡣ 20dB ௨ୖࡶᢚไࡉࢀࡿሙྜࡀ࠶ࡾ㸪⯒ࡢ๛ᛶࡢࣂࣛࡘࡁࡢᙳ㡪 ࡶཷࡅࡸࡍ࠸ࠋ㖄┤᪉ྥືࡢᙳ㡪ࡣẚ㍑ⓗᑠࡉࡃs5dB ⛬ᗘ࡛࠶ࡗࡓࠋᙳ㡪㔞ࡣ㸪ື※ࡽࡢ⨨࣭࿘Ἴᩘ࣭⯒ᵓᡂ ࡼࡾ␗࡞ࡿࠋࡼࡗ࡚㸪༢⣧࡞᪉ἲ࡛⯒ࡢᙳ㡪ࢆ⿵ṇࡍࡿࡇࡣ㞴ࡋ࠸⪃࠼ࡽࢀࡿࠋ 㺕㺎㺺㺎㺢㺼㸸 ື ᐃ㸪ືຍ㏿ᗘࣞ࣋ࣝ㸪᭷㝈せ⣲ἲ ┠ ḟ㸸 1.ࡣࡌࡵ 3.ᩘ್ࢩ࣑࣮ࣗࣞࢩࣙࣥࡼࡿ᳨ウ 2.⌧ሙ ᐃ 4.ࡲࡵ⪃ᐹ ࡣࡌࡵ 㕲㐨㏆᥋ࡍࡿᩜᆅ࠾࠸࡚ࡣ㸪㌶㐨ࡽⓎ⏕ࡋࡓ ືࡀᆅ┙ࢆఏᦙࡋ࡚ᘓ≀ධᑕࡋ㸪ᒃᐊෆ࠾࠸࡚ ᅛయ㡢ࡋ࡚⪺ࡇ࠼ࡿሙྜࡀ࠶ࡿࠋ᪂⠏≀௳࠾࠸࡚ ᑐ⟇ࢆ᳨ウࡍࡿ࠶ࡓࡗ࡚ࡣ㸪ᘓ≀ᕤ๓⌧ሙ࡚ ື ᐃࢆ⾜࠺ࡇࡀ୍⯡ⓗ࡛࠶ࡿࠋ ືࡣᘓ≀ᇶ♏ࡽධᑕࡍࡿࡢ࡛㸪ᆅ୰⨨࡛ࡢ ື ᐃࡀᮃࡲࡋ࠸ࡀ㸪ᆅ୰࡛ࡢᅛయ㡢㡿ᇦࡢື ᐃ ࡢᶆ‽ⓗ࡞ᡭἲࡀ☜❧ࡉࢀ࡚࠸࡞࠸ࡇ㸪᥀๐㈝⏝ ࡀࡿࡇ࡞ࡢ⌮⏤ࡼࡾ㸪ᆅ⾲㠃࡛ࡢ ᐃࡀ⾜ ࢃࢀࡿࠋ ࡲࡓ㸪ᅛయ㡢㡿ᇦࡢືࡢ ᐃ࠾࠸࡚ࡣ㸪ືࣆ ࢵࢡࢵࣉࡢタ⨨≧ἣࡀ ᐃ⤖ᯝࡁࡃᙳ㡪ࡍࡿࡇ ࡀ▱ࡽࢀ࡚࠸ࡿࠋᆅ⾲㠃㗰〇࡞ࡢ◳࠸ᮺࢆᡴࡕ ㎸ࡳ㸪ࡑࡇືࣆࢵࢡࢵࣉࢆᅛᐃࡍࡿⰋ࠸ࡉ ࢀ࡚࠸ࡿ1)ࠋ ࡋࡋ㸪≉㒔ᕷ㒊࠾࠸࡚ࡣ㸪ᘓ≀ᕤ๓ࡢᩜᆅ ࡣࢫࣇࣝࢺ࡞ࡢ⯒ࡀ⾜ࢃࢀ㥔㌴ሙ➼⏝ࡉ ࢀ࡚࠸ࡿࡀከ࠸ࠋ⯒ࡣᆅ⾲㠃ࢆᗈࡃそ࠺ࡇࡽ ᆅ⾲㠃ࡢືࡁ࡞ᙳ㡪ࢆཬࡰࡍணࡉࢀࡿࠋࡲ ࡓ㸪⯒⮬యࡢ๛ᛶࡁ࡞ࣂࣛࡘࡁࡀ࠶ࡾᏳᐃࡋࡓ ᐃ್ࡀᚓࡽࢀ࡞࠸ゝࢃࢀ࡚࠸ࡿ1)ࠋ ࡼࡗ࡚㸪ື ᐃ⤖ᯝࢆᅛయ㡢ᑐ⟇ࡢ᳨ウ⏝࠸ࡿ ࡓࡵࡣ⯒ࡢᙳ㡪ࢆᐃ㔞ⓗ▱ࡿࡇࡀ㔜せ࡛࠶ࡿࠋ ࡋࡋ࡞ࡀࡽ㸪ࡇࢀࡲ࡛ື ᐃᑐࡍࡿ⯒ࡢᙳ㡪 ࡀᐃ㔞ⓗ᳨ウࡉࢀࡓࡣᑡ࡞࠸ࠋ ࡑࡇ࡛ᮏㄽᩥ࡛ࡣ㸪⯒㠃㠀⯒㠃࡛ࡢືࢆẚ ㍑᳨ウࡍࡿࡇ࡛⯒ࡢᙳ㡪ࢆᐃ㔞ⓗᢕᥱࡍࡿࠋල యⓗࡣ㸪ᐇ⌧ሙ࠾ࡅࡿࢫࣇࣝࢺ⯒ࡢᙳ㡪ࡢ ᐃࢆ♧ࡋ㸪ࡉࡽ᭷㝈せ⣲ἲࡼࡿᩘ್ゎᯒࢆ⏝ ࠸࡚⯒ࡢᙳ㡪ࢆ᳨ウࡍࡿࠋ ⌧ሙ ᐃ 㕲㐨ᆅୗࢺࣥࢿࣝࡽࡢືࡘ࠸࡚㸪࠸⣙ 1m ࡣ࡞ࢀࡓࢫࣇࣝࢺ⯒㠃㠀⯒㠃ࢆྠ ᐃࡍࡿᶵࡀ࠶ࡗࡓࠋ ᐃ᪉ἲ ᐃࡋࡓ⨨ࡢ᩿㠃ᅗࢆᅗ ♧ࡍࠋ ᐃࡢࢲ ࢢ࣒ࣛࢆᅗ ♧ࡍࠋ⌧ሙᩜᆅ௬ᅖ࠸ෆഃࡢ 30cm ⛬ ᗘࡲ࡛ࢫࣇࣝࢺ⯒ࡉࢀ࡚࠾ࡾ㸪ࡑࢀࡼࡾ᭦ෆ ഃࡢᆅ⾲㠃ࡣ᪤Ꮡᘓ≀ࡀ᧔ཤࡉࢀᅵࡀ㟢ฟࡋ࡚࠸ࡿ≧ ែ࡛࠶ࡿࠋࢫࣇࣝࢺ⯒㠃ࡣືຍ㏿ᗘࣆࢵࢡ ࢵࣉࢆ┤⨨ࡁࡋ㸪ᅵࡢ㒊ศࡘ࠸࡚ࡣᅗ ♧ࡍ ࣑ࣝᯈ࡛࡛ࡁࡓᯫྎ 2) ࢆᡴ㎸ࡳ㸪ᯈୖືຍ㏿ᗘࣆ ࢵࢡࢵࣉࢆ⨨࠸ࡓࠋືࢆࣞࢥ࣮ࢲグ㘓ࡋᣢࡕᖐ ࡾ㸪ิ㌴㉮⾜ࡢືࢆศᯒࡋࡓࠋศᯒ㡯┠ࡣ㸪ิ㌴ ㏻㐣ࡢ 1/3 ࢜ࢡࢱ࣮ࣈࣂࣥࢻࡢ➼౯ືຍ㏿ᗘࣞ࣋ ࡛ࣝ࠶ࡿࠋิ㌴㏻⾜≧ἣࡘ࠸࡚ࡣ㏆㞄࡛┠どࡋࡑࡢ ้ࢆグ㘓ࡋࡓࠋୖୗ᪉ྥࡢิ㌴ࡑࢀࡒࢀ 13 ᮏࡎࡘࡢ ࣞ࣋ࣝࢆồࡵࡓࠋ ᐃ⤖ᯝ ື᪉ྥࡈ㸪⯒㠃ࡢ ᐃⅬࡢ⤖ᯝࡽ㠀⯒ 㠃ࡢ⤖ᯝࢆᘬ࠸࡚ࣞ࣋ࣝᕪࢆồࡵ㸪ࡉࡽิ㌴ࡢୖୗ ࡢูࡈࣞ࣋ࣝᕪࡢ⟬⾡ᖹᆒࢆ⟬ฟࡋࡓࠋࡑࡢ⤖ᯝ ࢆᅗ ♧ࡍࠋືィࡢ≉ᛶ࠾ࡼࡧ SN ẚࢆ⪃៖ࡋ࡚㸪 10㹼80Hz ᖏᇦࡢ⤖ᯝࢆ♧ࡋࡓࠋ 㖄┤᪉ྥື(Z)ࡘ࠸࡚ࡣ 2㹼+3dB ࡢᕪ⣡ࡲࡗ࡚ ࠸ࡿࡀ㸪Ỉᖹື㸦X,Y㸧ࡣ࿘Ἴᩘࡀ㧗ࡃ࡞ࡿࡘࢀ࡚ ⯒㠃ୖࡢືࡢ᪉ࡀᑠࡉࡃ࡞ࡾ㸪ῶᑡ್ࡣ 20dB ㏆ࡃ ࡶ㐩ࡍࡿࠋX ᪉ྥືࡢ᪉ࡀ Y ᪉ྥẚ࡚ῶᑡ㔞 ᘓ⠏ᮏ㒊ᢏ⾡⟶⌮㒊ᢏ⾡⟶⌮➨ࢢ࣮ࣝࣉ * 建築本部 技術管理部 技術管理第二グループ U.D.C 534.2舗装が固体音領域の振動測定結果に与える影響の
実験的・数値解析的検討
瀬戸山春輝
＊ 53 東急建設技術研究所報No.41 東急建設技術研究所報No.41ࡣࡁ࠸ࠋX ᪉ྥࡣ⯒ࡀษࢀ࡚࠸࡞࠸᪉ྥ࡛࠶ࡾ Y ᪉ྥẚᣊ᮰ࡀࡁ࠸ࡀᙳ㡪ࡋ࡚࠸ࡿ⪃࠼ࡽࢀ ࡿࠋ ௨ୖࡢᵝ㸪Ỉᖹ᪉ྥࡢືࡣ⯒ࡼࡾᣊ᮰ࡉࢀ㸪 㠀⯒㠃ẚ 5㹼20dB ࡶᑠࡉࡃ࡞ࡿഴྥࡀぢࡽࢀࡓࠋ ᅗ ᐃ⨨㸦᩿㠃ᅗ㸧 ᅗ ᐃࡢࢲࢢ࣒ࣛ ᅗ ᆅ┙ື ᐃ⏝ࡢᯫྎ ᅗ ືຍ㏿ᗘࣞ࣋ࣝᕪ ᩘ್ࢩ࣑࣮ࣗࣞࢩࣙࣥࡼࡿ᳨ウ ᆅ┙ཬࡧ⯒ࢆࣔࢹࣝࡋ㸪᭷㝈せ⣲ἲ㸦FEM㸧ࢆ ⏝࠸࡚㸪ᆅ୰ࢆຍࡋࡓሙྜࡢᆅ⾲㠃ࡢືຍ㏿ᗘࡢ ้Ṕᛂ⟅ゎᯒࢆ⾜ࡗࡓࠋࡑࡢ⤖ᯝࡽ㸪⯒ࡢ࠶ࡿ ሙྜ↓࠸ሙྜࡢࣞ࣋ࣝᕪࢆ᥎ィࡋࡓࠋࡉࡽ㸪⯒ ࡢ๛ᛶ㸦ࣖࣥࢢ⋡㸧ࢆኚࡉࡏࡓሙྜࡢࣞ࣋ࣝᕪࡶ ᥎ィࡋࡓࠋ ᥎ィ᪉ἲ FEM ࡼࡿ้ᬺᛂ⟅ゎᯒࢆ⾜ࡗࡓࠋᛂ⟅ィ⟬ࡣ㸪 ᕷ㈍ࡢỗ⏝ FEM ࢯࣇࢺ࢚࢘ࢆ⏝࠸࡚࠸ࡿࠋ ゎᯒࣔࢹࣝᅗࢆᅗ ♧ࡍࠋᕥྑᑐ⛠ࡢ 2 ḟඖࣔࢹ ࡛ࣝ࠶ࡿࠋᆅ┙ࡣ㸪༢ᒙࡢ↓㝈ᙎᛶయࢆᐃࡋࡓࠋ⯒ ↓ࡋࡢሙྜ A)㸪࠾ࡼࡧ⯒࠶ࡾࡢሙྜ B)ࡢ 2 ࡘࡢሙ ྜࡘ࠸࡚ィ⟬ࢆ⾜ࡗࡓࠋ ィ⟬ᑐ㇟ࡢ࿘Ἴᩘ⠊ᅖࡣ 10㹼200Hz ࡋ㸪࣓ࢵࢩࣗ ࢧࢬࡣ 6 ࣓ࢵࢩࣗ㸭Ἴ㛗௨ୖ࡞ࡿࡼ࠺ 0.1m ࡢṇ᪉ ᙧ࣓ࢵࢩࣗࡋࡓࠋ㛫้ࡳࡣ 25,600Hz ࡋࡓࠋィ⟬ 㛫㛗ࡣ 0.5 ⛊㛫࡛㸪⥺ᙧゎᯒࢆ⾜ࡗࡓࠋ ᑐ⛠ቃ⏺ࡢᆅ୰ 7m ῝ࡉࡢ⨨ࢆᘧ(1)♧ࡍ࢞࢘ࢫ ࣃࣝࢫࢆ⏝࠸࡚ຍࡋࡓࠋ ݃ሺሻ ൌ ߙ ͳ ߪξʹߨ݁ ିሺ௧ି௧బሻమ ଶఙమ ൗ (1) ࡞࿘Ἴᩘ⠊ᅖࡀ 200Hz ௨ୗ࡞ࡿࡼ࠺Ȫ=0.0015 ࡋ㸪ࣆ࣮ࢡ್ࡀ 1000N ࡞ࡿࡼ࠺Șࢆタᐃࡋࡓࠋࡲࡓ㸪 50ms ຍຊࡢࣆ࣮ࢡࡀ᮶ࡿࡼ࠺タᐃ㸦t0=0.05㸧ࡋ ࡓࠋ ⯒⾲㠃࠾࠸࡚㸪ᑐ⛠ቃ⏺ࡽ 1㹼12m ࡲ࡛ 1m ࣆ ࢵࢳࡢⅬ࡛ືຍ㏿ᗘἼᙧࢆồࡵࡓࠋࡉࡽ㸪ࡑࡢἼ ᙧࢆ 1/3 ࢜ࢡࢱ࣮ࣈศᯒࡋࡓࠋ࢜ࢡࢱ࣮ࣈศᯒࡣ㸪 RION 〇Ἴᙧฎ⌮ࢯࣇࢺ࢚࢘ AS-70 ࢆ⏝࠸㸪༢Ⓨᭀ 㟢ࣞ࣋ࣝࢆồࡵࡓࠋ࡞࠾㸪ศᯒᙜࡓࡗ࡚ࡣ 0 ワࡵࢆ ⾜࠸ 2 ⛊㛗ࡉࡢಙྕࢆ⏝࠸࡚࠸ࡿࠋ ௨ୖࡣⴭ⪅ࡼࡿูሗ 3)ྠᵝࡢᡭἲ࡛࠶ࡾ㸪ヲ⣽ ࡘ࠸࡚ࡣཧ↷ࡉࢀࡓ࠸ࠋ ᅗ ゎᯒࣔࢹࣝ GL ᆅୗ㕲㐨䝖䞁䝛䝹 ᐃ⨨ 10m 8ch䝕䝆䝍䝹䝺䝁䞊䝎 RIONDAͲ40 3᪉ྥື䝢䝑䜽䜰䝑䝥 ONOSOKKI NPͲ7310 ືィ RIONVMͲ51 1m ௬ᅖ 䜰䝇䝣䜯䝹䝖⯒ ᆅ┙ୖ Y Z X 150mmゅ t10mm 䛽䛨䝪䝹䝖 L=30cm GL 270 mm ⛬ᗘ Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 16 31.5 63 ➼౯ືຍ㏿ᗘ䝺 䝧䝹ᕪ (⯒ୖ䠉 ᆅ┙ୖ䠅 [d B] 1/3䜸䜽䝍䞊䝤୰ᚰ࿘Ἴᩘ [Hz] X᪉ྥ ୖ䜚 X᪉ྥ ୗ䜚 Y᪉ྥ ୖ䜚 Y᪉ྥ ୗ䜚 Z᪉ྥ ୖ䜚 Z᪉ྥ ୗ䜚 ⋇॔५ই॓ঝॺ๘ಎ W P ( H 3Ḓ ̲ NJP ખೝੀ ⋈ಽೕ &S PV&V PV̲ NJP ৌู ੀ ખ ೝ ੀ ਜ਼ P ਸஷ 崔崎崡崹嵓崡ك ځஷਸச২লਡ #P ખೝੀ ⋇ಽೕ &S PV&V PV̲ NJP ৌู ੀ ખ ೝ ੀ ਸஷ 崔崎崡崹嵓崡ك ځஷਸச২লਡ #P $ ๘ಎ૮ख % ๘ಎँॉ 東急建設技術研究所報No.41 54
᥎ィ⤖ᯝ ⯒࠶ࡾࡢሙྜ↓ࡋࡢሙྜ ⯒⾲㠃ྛⅬ࠾࠸࡚㸪⯒࠶ࡾࡢሙྜࡢ⤖ᯝࡽ ⯒↓ࡋࡢ⤖ᯝࢆᘬ࠸ࡓࣞ࣋ࣝᕪࢆồࡵࡓࠋࡑࡢ⤖ᯝ ࢆᅗ ♧ࡍࠋ⨨㸦ᑐ⛠ቃ⏺ࡽࡢ㊥㞳㸧ࢆᶓ㍈㸪 ࿘Ἴᩘࢆࣃ࣓࣮ࣛࢱ♧ࡋࡓࠋࡓࡔࡋ㸪࿘Ἴᩘࡣ௦⾲ ⓗ࡞ᖏᇦࡋ࡚ 16, 31.5, 63, 125Hz ࡢࡳࢆ♧ࡋࡓࠋ Ỉᖹືࡣ㸪ࢇࡢ⨨࣭࿘Ἴᩘ࠾࠸࡚⯒ ࠶ࡾࡢሙྜࡢ࠺ࡀ್ࡀᑠࡉ࠸ࠋࡑࡢῶᑡ㔞ࡣ⨨ࡸ ࿘Ἴᩘࡼࡾ␗࡞ࡗ࡚࠸ࡿࡀ㸪࡛᭱ 20dB ⛬ᗘࡶ㐩 ࡍࡿࠋࡲࡓ㸪࿘Ἴᩘࡀ㧗ࡃ࡞ࡿࡘ࠸࡚㸪ῶᑡ㔞ࡢ᭱ ್ࡀࡁࡃ㸪⯒ࡢᙳ㡪ࢆཷࡅࡸࡍ࠸ᛮࢃࢀࡿࠋ 㖄┤ືࡣ㸪⨨ࡸ࿘Ἴᩘࡼࡾs5dB ⛬ᗘࡢ⠊ᅖ ࡛ࣞ࣋ࣝᕪࡀኚࡋ࡚࠸ࡿࠋỈᖹືࡢሙྜ␗࡞ࡾ ୍ᴫ⯒᭷ࡾࡢ᪉ࡀᑠࡉ࠸ࢃࡅ࡛ࡣ࡞࠸ࠋ ᅗ ᥎ィ⤖ᯝ ⯒࠶ࡾ↓ࡋࡢሙྜࡢࣞ࣋ࣝᕪ ⯒ࡢ๛ᛶࢆኚࡉࡏࡓሙྜ ࢫࣇࣝࢺ⯒ࡢࣖࣥࢢ⋡ࢆ 1/2 ࡋࡓሙྜ㸪2 ಸࡋࡓሙྜࡘ࠸࡚ィ⟬ࢆ⾜ࡗࡓࠋ ࣖࣥࢢ⋡ࢆ 1/2 ࡋࡓሙྜ㸦ᰂ⾲グ㸧ඖࡢሙྜ ࡢࣞ࣋ࣝᕪࢆᅗ ♧ࡍࠋỈᖹ᪉ྥືࡣඖࡢሙྜࡼ ࡾ 0㹼5dB ⛬ᗘࡁࡃ࡞ࡿഴྥࡀぢࡽࢀࡿࠋ୍᪉㸪㖄┤ ᪉ྥືࡣࢇኚࡀ↓ࡃ-0.8㹼+0.3dB ⛬ᗘࡢᕪ ࡛࠶ࡗࡓࠋ ࣖࣥࢢ⋡ࢆ 2 ಸࡋࡓሙྜ㸦◳⾲グ㸧ࡢࣞ࣋ࣝ ᕪࢆᅗ ♧ࡍࠋỈᖹ᪉ྥືࡣඖࡢሙྜࡼࡾᑠࡉࡃ ࡞ࡿഴྥ࡛㸪࡛᭱-6dB ⛬ᗘࡢῶᑡ࡛࠶ࡿࠋ㖄┤᪉ྥ ືࡣ㸪125Hz ࡢ 10m ௨ୖࡢ⨨ࢆ㝖ࡁ㸪ࣖࣥࢢ⋡ 1/2 ࡢሙྜྠᵝ㸪ࢇኚࡀ↓࠸ࠋ ᅗ ᥎ィ⤖ᯝ ⯒(ᰂ)㏻ᖖࡢሙྜࡢࣞ࣋ࣝᕪ ᅗ ᥎ィ⤖ᯝ ⯒(◳)㏻ᖖࡢሙྜࡢࣞ࣋ࣝᕪ Ͳ25 Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 10 1 2 3 4 5 6 7 8 9 10 11 12 ືຍ ㏿ᗘ䝺 䝧䝹ᕪ [d B ] ⨨ [m] ỈᖹືͲLEͲ⯒ 䛒䜚䞊↓䛧 16Hz 31.5Hz 63Hz 125Hz Ͳ25 Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 10 1 2 3 4 5 6 7 8 9 10 11 12 ືຍ ㏿ᗘ䝺 䝧䝹ᕪ [d B ] ⨨ [m] 㖄┤ືͲLEͲ⯒ 䛒䜚䞊↓䛧 16Hz 31.5Hz 63Hz 125Hz Ͳ25 Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 10 1 2 3 4 5 6 7 8 9 10 11 12 ື ຍ ㏿ ᗘ 䝺 䝧 䝹 ᕪ [d B ] ⨨ [m] ỈᖹືͲLEͲ⯒ 䛒䜚䠄ᰂ䠅䞊↓䛧 16Hz 31.5Hz 63Hz 125Hz Ͳ25 Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 10 1 2 3 4 5 6 7 8 9 10 11 12 ື ຍ ㏿ ᗘ 䝺 䝧 䝹 ᕪ [d B ] ⨨ [m] 㖄┤ືͲLEͲ⯒ 䛒䜚䠄ᰂ䠅䞊↓䛧 16Hz 31.5Hz 63Hz 125Hz Ͳ25 Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 10 1 2 3 4 5 6 7 8 9 10 11 12 ືຍ ㏿ᗘ䝺 䝧䝹ᕪ [d B ] ⨨ [m] ỈᖹືͲLEͲ⯒ 䛒䜚䠄◳䠅䞊↓䛧 16Hz 31.5Hz 63Hz 125Hz Ͳ25 Ͳ20 Ͳ15 Ͳ10 Ͳ5 0 5 10 1 2 3 4 5 6 7 8 9 10 11 12 ືຍ㏿ ᗘ䝺 䝧䝹ᕪ [d B ] ⨨ [m] 㖄┤ືͲLEͲ⯒ 䛒䜚䠄ᰂ䠅䞊↓䛧 16Hz 31.5Hz 63Hz 125Hz 東急建設技術研究所報No.41 55
௨ୖࡢᵝ㸪⯒ࡢ๛ᛶ㸦ࣖࣥࢢ⋡㸧ࡢኚࡣ㸪Ỉ ᖹ᪉ྥືᑡ࡞ࡃࡶs5dB ⛬ᗘࡢᙳ㡪ࢆ࠼㸪㖄 ┤᪉ྥືࡣࡑࢀࡢᙳ㡪ࢆ࠼࡞࠸⤖ᯝ࡛࠶ࡗ ࡓࠋ ࡲࡵ⪃ᐹ ᐇ⌧ሙ࠾ࡅࡿࢫࣇࣝࢺ⯒ࡢᙳ㡪ࡢ ᐃࢆ ♧ࡋ㸪ࡉࡽ᭷㝈せ⣲ἲࡼࡿᩘ್ゎᯒࢆ⏝࠸࡚⯒ ࡢᙳ㡪ࢆ᳨ウࡋࡓࠋ⯒ࡢᙳ㡪ࡣ㸪⯒㠃㠀⯒㠃 ࡛ࡢືࢆẚ㍑᳨ウࡋ࡚ᐃ㔞ⓗ᳨ウࡋࡓࠋࡑࡢ⤖ᯝ㸪 ௨ୗࡀࢃࡗࡓࠋ ࣭ᆅ⾲㠃࡛ࡢືᑐࡋ㸪⯒ࡣୗグࡢࡼ࠺࡞↓ど࡛ ࡁ࡞࠸ࡁࡉࡢᙳ㡪ࢆ࠼ࡿ ࣭Ỉᖹ᪉ྥືࡣ㸪㖄┤᪉ྥືẚ㸪⯒ࡢᙳ㡪 ࢆࡁࡃཷࡅ㸪ࣞ࣋ࣝࡀῶᑡࡍࡿഴྥ࡛࠶ࡿࠋῶᑡ㔞 ࡣ 20dB ࡶ㐩ࡍࡿሙྜࡀ࠶ࡿࠋ࿘Ἴᩘࡀ㧗ࡃ࡞ࡿࡘ ࢀᙳ㡪ࡀࡁࡃ࡞ࡿࡼ࠺࡛࠶ࡿࠋࡲࡓ㸪⯒ࡢ๛ᛶࡢ ኚࡢᙳ㡪ࢆཷࡅࡸࡍ࠸ ࣭㖄┤᪉ྥືࡶ㸪⯒ࡢᙳ㡪ࢆཷࡅࡿࡀ㸪ࡑࡢᙳ㡪 ࡣỈᖹ᪉ྥືࡼࡾᑠࡉࡃs5dB ⛬ᗘ࡛࠶ࡗࡓࠋ ⨨࣭࿘Ἴᩘࡼࡾ㸪ࣞ࣋ࣝࡀῶᑡࡍࡿሙྜࡶቑຍࡍࡿ ሙྜࡶ࠶ࡿ ࣭⯒ࡢᙳ㡪㔞ࡣ㸪⨨࣭࿘Ἴᩘࡸ⯒ࡢᵝ㸦๛ᛶ㸧 ࡼࡾ」㞧ኚࡍࡿ ௨ୖࡢࡼ࠺㸪ࢫࣇࣝࢺ⯒㠃࠾࠸࡚ࡢື ᐃ⤖ᯝࡣ㸪㠀⯒㠃࡛ࡢ ᐃ⤖ᯝᕪࡀ࠶ࡿࡢ࡛㸪 ࡑࡢ⤖ᯝࢆ⏝࠸࡚ᅛయ㡢ᑐ⟇࡞ࡢ᳨ウࢆ⾜࠺ሙྜࡣ ὀពࡀᚲせ࡛࠶ࡿࠋ≉㸪Ỉᖹ᪉ྥືࡣᩘࣛࣥࢡ௨ ୖࡶᑠࡉ࠸ ᐃ⤖ᯝ࡞ࡗ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋ ࡲࡓ㸪⨨࣭࿘Ἴᩘࡸ⯒ࡢᵝࡼࡾ⯒ࡢᙳ㡪 ࡣ」㞧ኚࡍࡿࡢ࡛㸪⯒ࡢᙳ㡪ࢆ༢⣧࡞᪉ἲ࡛⿵ ṇࡍࡿࡇࡣ㞴ࡋ࠸ࠋࢺࣥࢿࣝࡸᆅ┙ࢆ㐺ษࣔࢹࣝ ࡋಶูࡢᩜᆅ࠾ࡅࡿ⯒ࡢᙳ㡪ࢆᩘ್ィ⟬࡛᥎ィ ࡍࡿᡭἲࡀ᭷ᮃ࡛࠶ࡿᛮࢃࢀࡿࠋ ࡞࠾㸪ᆅ୰࡛ࡢື ᐃࡀྍ⬟࡛࠶ࢀࡤ⯒ࡢᙳ㡪 ࢆ㑊ࡅࡽࢀࡿྍ⬟ᛶࡀ࠶ࡿࡀ㸪ࡢ⛬ᗘࡢ῝ࡉ࡛ࡢ ᐃࡀᚲせ㸪ࡑࡢࡓࡵࡢື ᐃᶵᮦࢆྵࡵࡓ ᐃᡭ ἲ࡞ᚋࡢ᳨ウ࣭㛤Ⓨࢆせࡍࡿࠋ ᚋࡶᘬࡁ⥆ࡁ㸪ᩘ್ィ⟬ࢆ⏝ࡋ࡞ࡀࡽ㸪ᅛయ㡢 ఏᦙࡢ ᐃᡭἲ࠾ࡼࡧண ᡭἲ㛵ࡍࡿ㛤Ⓨࢆ⾜ࡗ࡚ ࠸ࡃࠋ ㅰ ㎡ ⌧ሙື ᐃ༠ຊࢆ㡬࠸ࡓᘓ⠏ᮏ㒊ᢏ⾡㒊 ືᢏ⾡ࢢ࣮ࣝࣉ࠾ࡼࡧ㡢㡪࣭㟁☢⎔ቃࢢ࣮ࣝࣉ㸦ᙜ㸧ࡢྛឤㅰ࠸ࡓࡋࡲࡍࠋ ཧ⪃ᩥ⊩ 1) ᪥ᮏᘓ⠏Ꮫ⦅ : ⎔ቃື࣭ᅛయ㡢ࡢ ᐃᢏ⾡࣐ࢽࣗࣝ, pp93-95, ࣮࣒࢜♫, 1999 ᖺ 2) ℩ᡞᒣ ㍤ , ㇏ᔱ Ꮫ : 㕲㐨ᅛయ㡢ࡢ⌧ሙᐇ ⏝࠸ࡿᆅ┙㠃ື ᐃἲࡢᐇ㦂ⓗ᳨ウ, ᪥ᮏᘓ⠏ᏛᏛ⾡ㅮ₇᱾ᴫ㞟, pp.167-168, 2014ᖺ 9 ᭶ 3) ℩ᡞᒣ ㍤ , ㇏ᔱ Ꮫ : 㕲㐨ࢺࣥࢿࣝࡽⓎ⏕ࡍࡿᅛయ㡢㡿ᇦࡢືࡢᩘ್ィ⟬ࡼࡿ᳨ウ, ᮾᛴᘓタᢏ⾡◊✲ᡤሗ, No40, pp57-60, 2014ᖺ
NUMERICAL ANALYSIS AND MEASUREMENT EXAMPLES OF THE EFFECTS OF PAVEMENT
FOR VIBRATION MEASUREMENT IN GROUND-BORN SOUND
H. Setoyama
Vibration measurement on the surface of site is necessary to consider the measures for ground-born sound of a railway. However the surface of the site has often been paved, which is assumed to significantly effect vibration measurement on the site. This paper shows some results of numerical analysis and measurement examples of the effects of pavement for vibration measurement.
The main results are as follows: Horizontal vibration is suppressed as much as 20 dB, and susceptible to the rigidity of the pavement. The effects to vertical vibration is smaller, that is about s5dB. The effect quantity differs depending on the frequency, the position of the measurement and the specification of pavement.
東急建設技術研究所報No.41
