M'chilengedwe, mileme imagwiritsa ntchito ultrasonic echolocation kuti ipeze nyama, ndipo panthawi imodzimodziyo, nyamayi yasinthanso chitetezo - njenjete zina zimatha kuyamwa mafunde akupanga kudzera m'mapiko awo kuti zisawonongeke zomwe zimawulula malo awo.Aka kanali koyamba kuti asayansi atulukire zida zamawu mu chilengedwe.Ngakhale mapiko a njenjete amayang'ana pa mafunde a ultrasonic (kugwedezeka kwafupipafupi ndi kwakukulu kuposa 20,000 Hz), mfundo zawo zokomera mawu zimagwirizana ndi mitundu yonse ya zipangizo zomwe timaziwona m'miyoyo yathu, koma zotsirizirazi Sinthani mapangidwe ofananawo kuti azisinthasintha. band (20Hz-20000Hz) mogwirizana ndi kumva kwa anthu.Lero, tiyeni tikambirane za NVH-zopangidwa thovu.
Phokoso limachokera ku kugwedezeka kwa chinthu, ndipo ndi mawonekedwe a mafunde omwe amafalikira kudzera mu sing'anga ndipo amatha kuzindikirika ndi chiwalo chomvera cha munthu.NVH imatanthawuza phokoso (phokoso), kugwedezeka (kugwedezeka) ndi nkhanza (zovuta), zomwe phokoso ndi kugwedezeka ndizo zomwe timamva mwachindunji ndi ife, pamene kuuma kwa phokoso kumagwiritsidwa ntchito makamaka pofotokoza momwe thupi la munthu limakhalira kugwedezeka ndi phokoso. .kumva kusapeza bwino.Popeza kuti zitatuzi zimawoneka nthawi imodzi mu kugwedezeka kwa makina ndipo sizimasiyanitsidwa, nthawi zambiri amaphunzira pamodzi.
Monga momwe tawonetsera m'chithunzichi, pamene phokoso likulowetsedwa muzinthu kapena pamwamba pa chigawo cha acoustic structural, gawo la mphamvu ya phokoso likuwonekera, gawo lina limalowa muzinthuzo, ndipo mbali yake imatengedwa ndi zinthuzo, ndi, kukangana pakati pa phokoso ndi sing'anga yozungulira panthawi yofalitsa kapena kukhudzidwa kwa chigawocho.Kugwedezeka, njira yomwe mphamvu yamawu imasinthidwa kukhala kutentha ndikutayika.Nthawi zambiri, nkhani iliyonse imatha kuyamwa ndi kuwonetsa mawu, koma kuchuluka kwa kuyamwa ndi kusinkhasinkha kumasiyana kwambiri.
Zipangizo za NVH zimagawidwa m'magulu awiri: zida zotulutsa mawu komanso zotsekereza mawu.Phokoso likaloŵa m’zinthu zimene zimakoka mawu, limapangitsa mpweya ndi ulusi wa zinthuzo kunjenjemera, ndipo mphamvu ya mawuyo imasandulika kukhala mphamvu ya kutentha ndipo mbali ina yake idzanyekedwa, monga ngati kumenya siponji ndi chinkhupule. nkhonya.
Zida zotsekera mawu ndizomwe zimagwiritsidwa ntchito poletsa phokoso, monga nkhonya ikumenya chishango ndikuchitsekereza mwachindunji.Zida zotetezera mawu zimakhala zowuma komanso zopanda porous, ndipo zimakhala zovuta kuti mafunde a phokoso alowemo, ndipo mphamvu zambiri zamawu zimawonekera kumbuyo, kuti akwaniritse zotsatira za kutsekemera kwa mawu.
Zida zopangidwa ndi thovu zokhala ndi porous zimakhala ndi zabwino zapadera pakuyamwa kwamawu.Zida zokhala ndi mawonekedwe a microporous wandiweyani zimakhala ndi mawu abwino otchinjiriza.Ma NHV acoustic thovu wamba amaphatikiza polyurethane, polyolefin, utomoni wa rabara, ndi galasi.Foam, thovu lachitsulo, ndi zina zotero, chifukwa cha makhalidwe osiyanasiyana a zinthu zomwezo, zotsatira za kuyamwa kwa phokoso ndi kuchepetsa phokoso zidzakhala zosiyana.
Polyurethane thovu
Zinthu za thovu la polyurethane zili ndi mawonekedwe ake apadera a netiweki, omwe amatha kuyamwa mphamvu zambiri zomwe zikubwera kuti zimveke bwino pamayamwidwe, ndipo nthawi yomweyo zimakhala ndi kubweza kwakukulu komanso ntchito yabwino yopumira.Komabe, mphamvu ya thovu wamba ya polyurethane ndi yotsika, ndipo mphamvu yotchinjiriza yamawu imakhala yochepa, ndipo kamvekedwe kake ka mayamwidwe kake kamachepa pakapita nthawi.Kuonjezera apo, kuyaka kudzatulutsa mpweya wapoizoni, womwe sugwirizana ndi chilengedwe.
XPE/IXPE/IXPP polyolefin thovu zakuthupi
XPE/IXPE/IXPP, yolumikizidwa ndi mankhwala / yolumikizidwa pakompyuta ya polyethylene/polypropylene foam, imakhala ndi mayamwidwe achilengedwe, kutsekemera kwamafuta, kutchingira ndi kuteteza chilengedwe, ndipo mawonekedwe ake amkati odziyimira pawokha ndi abwino kutsekereza mawu komanso kuchepetsa phokoso.Kuchita bwino kwambiri.
mphira thovu
Rubber yokhala ndi thovu ndi chinthu chabwino kwambiri cha NVH, ndipo zida monga silikoni, mphira wa ethylene-propylene-diene (EPDM), mphira wa nitrile-butadiene (NBR), neoprene (CR), ndi rabara ya styrene-butadiene (SBR) ndizabwino kuposa zam'mbuyomu. zida ziwiri., Kachulukidwe kake ndi kokwera, ndipo mkati mwake muli zodzaza ndi ma voids ang'onoang'ono ndi zida zotseguka, zomwe zimakhala zosavuta kuyamwa mphamvu zamawu, zovuta kulowa, ndikuchepetsa mafunde amawu.
melamine utomoni thovu
Melamine resin foam (melamine foam) ndi chinthu chabwino kwambiri chokomera mawu.Ili ndi mawonekedwe a gridi yamitundu itatu yokhala ndi mipata yokwanira.Kugwedezeka kumadyedwa ndi kutengeka, ndipo mafunde owonetseredwa amatha kuthetsedwa bwino nthawi yomweyo.Panthawi imodzimodziyo, imakhala ndi maubwino ambiri ogwiritsira ntchito komanso oyenerera kuposa zida zamtundu wa thovu potengera kukhazikika kwa lawi, kutsekereza kutentha, kulemera kopepuka komanso mawonekedwe opangira.
aluminiyamu ya thovu
Onjezani zowonjezera ku chitsulo chosungunula cha aluminiyamu kapena zitsulo zotayidwa ndikuzitumiza ku bokosi lochita thovu, bayani gasi kuti apange thovu lamadzimadzi, ndi kulimbitsa thovu lamadzimadzi kuti likhale chitsulo.Ili ndi mphamvu yabwino yotchinjiriza mawu, ndipo kamvekedwe ka mawu kamakhala kotalika, moyo wogwira ntchito ukhoza kupitilira zaka 70, ndipo imatha kubwezeredwa ndikugwiritsidwanso ntchito 100%.
galasi la thovu
Ndi inorganic sanali zitsulo galasi zinthu zopangidwa ndi galasi wosweka, thovu wothandizila, kusinthidwa zina ndi thobvu accelerator, etc., pambuyo finely pulverized ndi uniformly kusakaniza, ndiye kusungunuka pa kutentha, thovu ndi annealed.
M'moyo weniweni, nthawi zambiri palibe zinthu zomwe zimatha kuyamwa mafunde amawu m'magulu osiyanasiyana, ndipo palibe chinthu chomwe chingagwire ntchito mosalakwitsa.Kuti tikwaniritse bwino mayamwidwe amawu, nthawi zambiri timawona kuphatikiza kwa thovu zomwe zili pamwambazi ndikuyimba ndi mitundu ya mayamwidwe amawu / zida zomangira mawu kuti apange mitundu yosiyanasiyana yamitundu yolimba ya thovu, ndipo nthawi yomweyo kuti akwaniritse zotsatira zake. mayamwidwe amawu azinthu komanso mayamwidwe am'mawu, kuti akwaniritse Mayamwidwe amawu azinthu m'magulu osiyanasiyana afupipafupi komanso otsika pafupipafupi.Mwachitsanzo, ndi gulu ndondomeko yamayimbidwe thovu ndi osiyana sanali nsalu njira angathe kugwiritsa ntchito mwapadera mawonekedwe atatu azithunzi-thunzi yotsirizira bwino kuchepetsa kugwedezeka kwa mafunde phokoso, kupanga mwayi wopandamalire kwa phokoso mayamwidwe ndi kuchepetsa phokoso;) sangweji ya thovu yosanjikiza zinthu, mbali ziwiri za khungu zimamangiriridwa ndi zinthu zolimba za kaboni, zomwe zimakhala ndi kulimba kwamakina komanso kulimba kwamphamvu, potero zimakwanitsa kuyamwa bwino ndikuchepetsa phokoso.
Pakalipano, zida za thovu za NVH zimagwiritsidwa ntchito kwambiri pamayendedwe, zomangamanga, kuchepetsa phokoso la mafakitale, kupanga magalimoto ndi zina.
Mayendedwe
ntchito yomanga zoyendera m’matauni ya m’dziko langa yalowa m’gawo lachitukuko chofulumira, ndipo chipwirikiti chaphokoso monga magalimoto, masitima apamtunda, mayendedwe a njanji m’tauni, ndi masitima apamtunda a maglev akopa chidwi cha anthu ambiri.M'tsogolomu, thovu lamayimbidwe ndi zida zake zophatikizika zimakhala ndi kuthekera kogwiritsa ntchito kwambiri pakutsekereza mawu komanso kuchepetsa phokoso lamisewu yayikulu komanso kuchuluka kwa anthu akumatauni.
ntchito zomanga
Pankhani ya zomangamanga ndi kapangidwe, kuwonjezera pakuchita bwino kwamayimbidwe, zida zili ndi zofunika kwambiri pachitetezo, ndipo kubwezeredwa kwamoto ndi chizindikiro cholimba chomwe sichingalambalale.Mapulasitiki amtundu wa thovu (monga polyolefin, polyurethane, etc.) amatha kuyaka chifukwa cha kuwotcha kwawo.Akayaka, amasungunuka ndikutulutsa madontho.Madontho oyaka moto amayambitsa kufalikira kwa moto mwachangu.Pofuna kuti zigwirizane ndi malamulo ndi malamulo oletsa moto wamoto, nthawi zambiri zimakhala zofunikira kuwonjezera zowonjezera moto, zomwe zambiri zidzawola zikamatenthedwa ndi kutentha kwambiri, ndikutulutsa utsi wambiri, mpweya woopsa komanso wowononga.zimayambitsa masoka achiwiri komanso kuwononga chilengedwe.Chifukwa chake, pantchito yomanga, zida zamayimbidwe zokhala ndi malawi amoto, utsi wochepa, kawopsedwe kakang'ono, komanso kuchepetsa katundu wamoto kudzakumana ndi mwayi waukulu wotukula msika, kaya ndi nyumba zamalonda monga malo ochitira masewera, makanema, mahotela, holo zamakonsati, etc. nyumba zogona.
Kuchepetsa Phokoso la Industrial
Phokoso la mafakitale limatanthawuza phokoso lomwe limapangidwa ndi fakitale panthawi yopanga chifukwa cha kugwedezeka kwamakina, kugunda kwamphamvu komanso kusokonezeka kwa mpweya.Chifukwa cha magwero a phokoso ambiri komanso omwazikana, mitundu yaphokoso imakhala yovuta kwambiri, ndipo magwero amawu opitilira muyeso amakhalanso ovuta kuzindikira, omwe ndi ovuta kuwawongolera.
Chifukwa chake, kuwongolera phokoso m'mafakitale kumatengera njira zingapo monga kuyamwa kwamawu, kutsekereza mawu, kuchepetsa phokoso, kuchepetsa kugwedezeka, kuchepetsa phokoso, kuwononga ma resonance, komanso kukulunga kwa mayamwidwe a mapaipi, kuti abwezeretse phokosolo. mlingo wovomerezeka kwa anthu.digiri, yomwe ilinso malo omwe angagwiritsire ntchito zida zamayimbidwe.
kupanga magalimoto
Magwero a phokoso lagalimoto amatha kugawidwa makamaka kukhala phokoso la injini, phokoso la resonance la thupi, phokoso la matayala, phokoso la chassis, phokoso la mphepo ndi phokoso lamkati la resonance.Phokoso lochepetsedwa mkati mwa kanyumbako lidzasintha kwambiri chitonthozo cha dalaivala ndi okhalamo.Kuphatikiza pa kuwongolera kulimba kwa chassis ndikuchotsa malo otsika kwambiri a resonance potengera kapangidwe kake, kuthetseratu phokoso kumachotsedwa makamaka ndi kudzipatula komanso kuyamwa.Pakuwona kupulumutsa mphamvu, zida zomwe zimagwiritsidwa ntchito zimafunikira kuti zikhale zopepuka.Kuchokera kumalo otetezera, zipangizo zimafunika kuti zikhale ndi moto ndi kutentha.Kubwera kwa thovu lamayimbidwe ndi zida zosiyanasiyana zophatikizika zambiri kumapereka mwayi watsopano wowongolera kukana phokoso, chitetezo, kudalirika, kupulumutsa mphamvu komanso kuteteza chilengedwe cha magalimoto.
Nthawi yotumiza: Aug-17-2022