从nastran到adams的产生柔体几种方法ppt整理.ppt

从nastran到adams的产生柔体几种方法ppt整理.ppt

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从nastran到adams的产生柔体几种方法ppt整理

Table of Contents Purpose of MSC.Nastran/Adams Flex Interface Features Supported User’s Interface Output for MSC.Adams MSC.Adams Units MSC.Nastran/Adams Interface Examples Example 1—Component as a superelement Example 2—Component as residual structure only Example 3—Component Restarting from SOL 106 to SOL 103 Guidelines and Limitations Purpose of MSC.Nastran/Adams Flex Interface Incorporates reduced flexible body component dynamics from MSC.Nastran into MSC.Adams Flex For performing system flexible body analysis—including large rigid body motions Typical Applications: Elasto-kinematic analysis of vehicular suspensions Engine crankshaft-drive train interaction Aircraft landing conditions Satellite panel deployment 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 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 Features Supported The component can 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 displacement with preload Run SOL 106 with preload and save database Restart in SOL 103 using “param,nmloop,x” User’s Interface Only two new commands/entries are required Case Control command to generate MNF file ADAMSMNF FLEXBODY=YES 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 User’s Interface (cont.) Full ADAMSMNF Case Control command Output for MSC.Adams The following output are generat

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