空調(diào)器室外機(jī)的降噪研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文空調(diào)器室外機(jī)的降噪研究姓名：王瑞強(qiáng)申請學(xué)位級(jí)別：碩士專業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：黃其柏20080529華中科技大學(xué)碩士學(xué)位論文華中科技大學(xué)碩士學(xué)位論文IIAbstractWiththedevelopmentofthelifetheairconditionerisusedwidely.Meanwhilethecustomersareeaglefthequietonesthenoiseleverhasbeenani

2、mptanttargettoevaluatethequalityofanairconditioner.Inthethesisnoiseradiatedfromtheoutdounitofsplittyperoomairconditionerswastestedinvestigated.Thesourceofthenoisewasidentified.Thetheyofnoisegenerationwasintroducedthepeak

3、noisefrequencywascalculated.Thetestedpeakfrequencywascomparedwiththecalculatedpeakfrequencytheyagreedeachotherverywell.Thisprovedthatthetestingresultisreasonable.Theconclusionsofthenoisereductionoftheoutdounitareasfollow

4、s:(1)thereductionofthediscretenoisefromthefan(2)thereductionofthevibrationofthecompress’sshell.Thetheythewidebnoiseofthefanthecompressnoisesuchasshellvibrationnoiseaeroacousticnoisemechanicalnoiseelectromagicnoisearealso

5、discussedcarefully.Thefiniteelementmodelofthecompress’sshellwasfounded.ThecalculatedmodaloftheshellwasobtainedthroughtheANSYSsoftware.Theadvantagedisadvantageofthethreecalculatedmethodsofviscoelasticstructurewhichwereuse

6、dinengineeringwerecompared.Anadvancedcalculatedmethodofviscoelasticstructurewasputfward.Inthismethodtheelasticmoduluslossfactofthedampingmaterialwithfrequencychangewereconsideredthusimprovethecalculationaccuracy.Atlastth