rigido flexible

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April 9, 2007

© 2007 ANSYS, Inc. All rights reserved.

ANSYS, Inc. Proprietary Inventory #00202

2!"

Rigid Body DynamicSetup

Chapter 2



April 9, 2007


Inventory #002402

2-2ANSYS, Inc. ropriet!ry

Training Manual

A. Rigid Dynamic Analysis rere!uisites

As noted e!rlier to per"or rigid dyn!ic sol$tions in ANSYS% – ANSYS Str$ct$r!l, &ech!nic!l or &$ltiphysics license.

– Add on license "or 'igid (yn!ic !n!lysis.



April 9, 2007


Inventory #002402

2-)ANSYS, Inc. ropriet!ry

Training Manual

B. Rigid Dynamic Setup

*eoetry% – 'igid dyn!ic odels !re c$rrently liited to )( solid +odies.

– &$lti+ody p!rts (esign&odeler !re not s$pported.

– All p!rts !re !ss$ed rigid no stressstr!in.



April 9, 2007


Inventory #002402


Training Manual

Rigid Dynamic Setup

Solid geoetry )( is $sed to de"ine the odel.

!rts !re considered rigid so density is the only re/$ired !teri!l

property.

o +egin ! rigid dyn!ic !n!lysis p!rts $st h!ve their sti""ness

+eh!vior "l!gged !s rigid.



April 9, 2007


Inventory #002402


Training Manual

Rigid Dynamic Setup

'igid +odies !re !$to!tic!lly sipli"ied in Si$l!tion !s shonhere.

he +ody is represented +y !ss eleents !t the centroid.

3oints !re represented +y their respective coordin!te systes.

&!ss

3oint

&!ss



April 9, 2007


Inventory #002402

2-ANSYS, Inc. ropriet!ry

Training Manual

Rigid Dynamic Setup

&!teri!ls% – Since !ll p!rts !re !ss$ed to +e rigid, only density is re/$ired !s !

!teri!l property.

– &!teri!ls !re !ssigned on ! per p!rt +!sis !s ith other Si$l!tion

!n!lysis types.


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Inventory #002402


Training Manual

Rigid Dynamic Setup

he !n!lysis !p shon !t Si$l!tion st!rt $p

c!n +e $sed to pre-con"ig$re ! rigid dyn!ic

sol$tion.

In !ddition !n end tie c!n +e speci"ied !s ell.

he !n!lysis tree ill +e con"ig$red "or rigid

dyn!ic !n!lysis.




Inventory #002402


Training Manual

C. Rigid Dynamic Connections

6nlie "le8i+le !n!lyses, rigid +odies !re rel!ted to one !nother !nd

to gro$nd $sing oint !ndor spring connections no cont!ct.

&otions !t e!ch oint !re de"ined ith respect to ! loc!l re"erence

coordin!te syste !ssoci!ted ith e!ch oint.




Inventory #002402


Training Manual

Rigid Dynamic Connections

3oints c!n +e cre!ted !n$!lly or !$to!tic!lly siil!r to

!$to!tic cont!ct cre!tion.

he !$to oint "e!t$re c!n cre!te revol$te !ndor "i8ed oints.



© 2007 ANSYS Inc All rights reserved

Inventory #002402

2-:0ANSYS, Inc. ropriet!ry

Training Manual

D. Rigid Dynamic Solution

'igid dyn!ic sol$tions eploy !n e8plicit tie integr!tion solver%

– No e/$ili+ri$ iter!tions.

– *ener!lly s!ller tie step si;es th!n tr!dition!l ANSYS solvers.

– <!n eploy !$to!tic tie stepping !lgorith recoended.

he initi!l conditions "or the !n!lysis c!n +e set $sing !n initi!lsolve or +y $sing the con"ig$re tool disc$ssed in the ne8t ch!pter.

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