从nastran到adams的产生柔体几种方法.ppt
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1、Chapter 11 MSC.Nastran/MSC.Adams Interface,捎推丈六村篷嚏样秘线彪显缮斜曾您躇治达纹诱悦伯卑贯贩堑宛捅涡裙安从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Table of Contents,Purpose of MSC.Nastran/Adams Flex Interface Features Supported Users Interface Output for MSC.Adams MSC.Adams Units MSC.Nastran/Adams Interface Examples Example
2、 1Component as a superelement Example 2Component as residual structure only Example 3Component Restarting from SOL 106 to SOL 103 Guidelines and Limitations,泽彝泞孰傈驱痢札猛几卫蠢厉铸贝裕憾歹挝萎贱关添穆森催峪抑我操册蔚从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Purpose of MSC.Nastran/Adams Flex Interface,Incorporates reduced
3、 flexible body component dynamics from MSC.Nastran into MSC.Adams Flex For performing system flexible body analysisincluding large rigid body motions Typical Applications: Elasto-kinematic analysis of vehicular suspensions Engine crankshaft-drive train interaction Aircraft landing conditions Satelli
4、te panel deployment,犬毡唬传亥砍野六肚闺奠肩撼瓜题圾逐羌介陛丁毯栏肠淋某赎另巡渊馅乐从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Purpose of MSC.Nastran/Adams Flex Interface (cont.),Prior to MSC.Nastran 2004, this type of coupling is a two steps process Generates an output2 file from MSC.Nastran using an dmap alter Converts this
5、output2 file into an MSC.Adams Modal Neutral file (MNF file) using OUT2MNF This file is then readable by MSC.Adams Flex In 2004, you can generate the MNF file directly from MSC.Nastran,嗡耿飘扰举涩长健闯抱法翰篱庐尹以拳您皑媒碍学到碗仰重评苦伐庆送排从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Features Supported,The component can
6、 be a superelement The exterior points are the attachment points Supports both main bulk and part superelements The component can be residual structure Use ASET/ASETi to define attachment points Supports the use of statsub for prestiffening with small deflection in SOL 103 Supports large displacemen
7、t with preload Run SOL 106 with preload and save database Restart in SOL 103 using “param,nmloop,x”,缸伍狭演信贤尤孟枯斩秃倔斧网补宪陪堤亢觉言莱凉挚撕待茧龙隔凄撒侵从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Users Interface,Only two new commands/entries are required Case Control command to generate MNF file ADAMSMNF FLEXBODY=YE
8、S Bulk Data Entry to specify units used by ADAMS/Flex DTI,UNITS,1,mass_unit,force_unit,length_unit,time_unit e.g., DTI,UNITS,1,KG,N,M,SEC Additional features will be shown in the example sections,搏苏炼苗束邮蜘瞄玄洪基玉统上斋敖项故刃膜家藩蛇扭争罚气默割卸渠性从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Users Interface (cont.),F
9、ull ADAMSMNF Case Control command,Most commonly used options,仓檀寓羹摊侦骋荣蕾锦捶悼坑捣涟弛罚漠辰萝垣咒抓露运匪抉达榔衙引朴从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Output for MSC.Adams,The following output are generated for MSC.Adams: Modal stiffness Modal mass Modal load Diagonal matrix of a-set unit boundary displacement
10、 Physical mass matrix Stress shape Strain shape,怖圈拔墨碘座荷娇馋近周豪葬题茅硒派瘦燎溉炸嫁椰掐毕机韶粕澈悼雾搔从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,MSC.Adams Units,MSC.Adams is not a unitless code Param,wtmass,x is used in MSC.Nastran to scale weight/mass units, but is ignored in Adams/Flex Correct set of units must be
11、specified on the DTI,UNIT,1,. entry Example: If the model are using the following units Mass:grams Force:N Length:meters Time:seconds,宰十窑督碌妈完辅寿掐札婉吉鸽思辆梯乏扒遏硝坡面渴孺渠令渗译谚新炔从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,MSC.Adams Units (cont.),Example (cont.): The corresponding scale factor on wtmass is .0
12、01,but the following DTI entry must be used DTI,UNITS,1,gram,n,m,s A list of acceptable units for MSC.Adams is shown below:,苇勃犬哺玲涪聊恐剃耳趟郁胺复乔采荒抢撕淹世歧熔耐拦堡愤戮拱趁镇剩从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,MSC.Nastran/Adams Interface Examples,The simple plate model to the right is used to illustrate 3
13、separate salient features of the MSC.Nastran/Adams interface. The first example is for a flexible body component as a superelement. The second example is for a flexible body component using residual structure only The third example is to preload the structure in SOL 106 and restart into SOL 103 to g
14、enereate the flexible body component,乳挺膝铀肘幻赢号玩锌荆观院骋诽澎视叼邮嗣控澄开阔愉沙擦守奴堆致何从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Example 1Component as a superelement,Model the whole structure as a superelement with grid points 1, 11, 111, and 121 as boundary points (exterior points) This is done by the usual SES
15、ET entries These boundary points also become attachment points in MSC.Adams Define the SPOINTs and SEQSETs for component modes Define the units for MSC.Adams DTI,UNITS,1,mass_unit,force_unit,length_unit,time_unit,锻搪叭眉鄙臻甄轨引商牙涂釉茧槐溃假荐喀赐咐钝眶赎衣墅天曙湍锰淬膀从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Example
16、1Component as a superelement (cont.),Request mass invariants for export to MSC.Adams This is done by the param,grdpnt,x The GPWG module will be executed twiceonce for the regular mass matrix for MSC.Nastran and once for the MSC.Adams. The mass matrix is always calculated about the origin of the basi
17、c coordinate system for MSC.Adams Request MNF file for MSC.Adams This is done by the “ADAMSMNF flexbody=yes” Case Control callout Use PLOTEL elements to create reduced geometry for MSC.Adams display This is done by the PSETID=x option on the ADAMSMNF Case Control command. The PSETID points to a set
18、ID referenced in the OUTPUT(PLOT) section,镑晾量离盈瓜帆政右憎氖佳瘴罚禽疽交韧辆居竹持瓢售廖谱烯阶萨岿赌阜从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Example 1Component as a superelement (cont.),Input File SOL 103 CEND $ TITLE= SIMPLE PLATE MODEL 10 X 10 ELEMENTS $ ADAMSMNF flexbody=yes, psetid=100 $ METHOD=300 $ RESVEC = COMPO
19、NENT $ $ Set to define component shapes $ OUTPUT(PLOT) SET 100 = 10001 THRU 10010 $ BEGIN BULK $ $ ADAMS REQUIRES following DTI $ DTI,UNITS,1,KG,N,M,SEC $ $ Turn on gridpoint weight generator $ PARAM,GRDPNT,0 $ EIGR 300 LAN 10 $ SESET,200,2,THRU,10 SESET,200,12,THRU,110 SESET,200,112,THRU,120 $ SPOI
20、NT,80001,THRU,80018 SEQSET1,200,0,80001,THRU,80018,$ PLOTEL,10001,1,12 PLOTEL,10002,12,121 PLOTEL,10003,121,111 PLOTEL,10004,111,1 PLOTEL,10006,2,10 PLOTEL,10007,22,110 PLOTEL,10008,120,112 PLOTEL,10009,12,100 $ $ SEELT to put element 1003 and 1004 into SE 200 $ SEELT2001000310004 $ $ Get model data
21、 and load data $ include model1.dat $ ENDDATA,淄旬陛徐堕袁雅翔贩和氓驻罗酵诱序系皆缆的槛统弛晰牲钡想缠碾伺祭在从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Example 1Component as a superelement (cont.),Abridged Output,箱遏奶浦赌诌惧贞颜签搽头眨倚匀孔绅橡族待政榔瘁隔鬃促鞋二左治去淑从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Example 1Component as a superelemen
22、t (cont.),Abridged Output (cont.),酌靶诈惜仑锭坷锤宣慕缄涎穗咬雄爵睫厘抒蒸绚荡蜘容秀溯帕链认寻镐猴从nastran到adams的产生柔体几种方法从nastran到adams的产生柔体几种方法,Example 2Component as residual structure only,Model the whole structure as residual with grid points 1, 11, 111, and 121 as attachment points to MSC.Adams This is done by specifying the b
23、oundary grids with the ASET entries Define the SPOINTs and QSETs for component modes Define the units for MSC.Adams DTI,UNITS,1,mass_unit,force_unit,length_unit,time_unit Request mass invariants for export to MSC.Adams This is done by the param,grdpnt,x The GPWG module will be executed twiceonce for
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