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时间:2019-05-25
《利用附加质量的设计参数型模型修正方法》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、!43"!7#!"#$$%(!"#)Vol.43No.72009$7%JournalofZhejiangUniversity(EngineeringScience)Jul.2009DOI:10.3785/j.issn.1008973X.2009.07.02567ê4·<ÎÇtfdf89®?Q,RST,(U,VWX(^SmÉZ+ô¼mnV,>^^E710072)DE:rsöùÅyzQ«?ò±?ï¤%¨?òz¦1©,?ò±n@,?jª?¶£mn̸Q'Î,¡à}ËfÏ:m¦?ò±?é¡~!ò±?Q?ò.#±?ö_A'4W,¢àyz®CsÏ:m¦Q6n¤,gç-.íÏ:
2、m¦bÒz%¨¦Q?ò±n.¢7Ë©ù$ÇB«®Ë©ªÿ¤²Ý«ä,g¶}#?ò;?Qd´.Ó©;ä(òBQv4C-«EÒ30%~50%,?òÀ«Q:;EÒ`Îx1%.9R¼½¾¿,1m¡àQ?ò±?ZZ9Ô}â¸Q%¨z¦1,Ãy}sØÉ«¬¦1Q̸,¡~};?Q?ò,ºOúô?ò¼½QSßRÅÅ¿.FGH:«?ò;ùÅD¨yz;Ï:m¦IJKLM:O327NOPQR:ANSTM:1008973X(2009)07129705犇犲狊犻犵狀狆犪狉犪犿犲狋犲狉狅狉犻犲狀狋犲犱犿狅犱犲犾狌狆犱犪狋犻狀犵犿犲狋犺狅犱狌狊犻狀犵犪犱犱犻狋犻狅狀犪犾犿犪狊狊犲狊LIBin,Y
3、ANGZhichun,WANGLe,FUYonghui(犇犲狆犪狉狋犿犲狀狋狅犳犃犲狉狅狀犪狌狋犻犮犪犾犛狋狉狌犮狋狌狉犪犾犈狀犵犻狀犲犲狉犻狀犵,犖狅狉狋犺狑犲狊狋犲狉狀犘狅犾狔狋犲犮犺狀犻犮犪犾犝狀犻狏犲狉狊犻狋狔,犡犻犪狀710072,犆犺犻狀犪)犃犫狊狋狉犪犮狋:Astherearetoomanyunknownvariableswhichneedtobeupdatedforthemodelupdatingmethodusingadditionalmasses,theupdatingequationconductedbythismethodisanun
4、derdeterminedequation,andtheupdatingaccuracycannotmeettherequirementsofengineeringapplications.Adesignparameterorientedmodelupdatingmethodwaspresentedtoimprovetheaccuracyofthismethod.Taylorsseriesofthesystemmatricesexpandedwithrespecttodesignparameterswereadopted,andthesensitivityin
5、fluencematricesofstiffnessandmasswerederived,thenupdatingobjectswereconvertedtodesignparameters.Astraightwingmodelandastepsectionbeamwereperformedasnumericalexamplestoverifytheimprovedmethod.Forthetwoexamples,localstiffnesserrorsintherangeof30%to50%wereintroducedintotheinitialfinite
6、elementmodels.Thecalculationerrorsobtainedbytheupdatedfiniteelementmodelswerelessthan1%forbothexamples.Theresultsshowedthatthepresentedmethodcanlargelyreducethenumberofunknownvariables,andjustlimitedmeasuredmodeswereneeded,andtheupdatingaccuracywasalsobetterthanthatoftheoriginalmethod,
7、andfurthermore,thephysicalindicationsofupdatingresultswereclearerthanthatoftheoriginalmethod.犓犲狔狑狅狉犱狊:modelupdating;addedknownmasses;designparameterw«?òË$ÆN;mnQæb9R'QSm¦î>Wm¦g¶?ò.±?QÎwË,D?ò;?K?òs×µí¢Ó*b¤xSÍÌDμQsÞEF·,¼½[1]C:ËCÆ,¹sC、yz@÷¹Â¿QSR.Ï:m¦±?Q?ÊQÏg¶?ò;ÜËCÆÏ:m¦,ßs«ò¼½Â¿QSßR,¸î
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