*** ERROR # 827 ***

seno

FEM model for eigenvalue analysis was created with Femap with NASTRAN.

The file extension is dat.

However, the analysis at NASTRAN took a very long time.

So, I want to import this into HyperMesh, and perform eigenvalue analysis with Optistruct.

When I operated as shown, I got the following error:

 

 

<?xml version="1.0" encoding="UTF-8"?>

 

*** ERROR # 827 ***

Invalid ASET run, PARAM,EXTOUT,DMIGPCH or

PARAM,EXTOUT,DMIGBIN must be specified for DMIG output.

 

How do I resolve the error?
Reference documents are more helpful.

Also, I want to perform frequency response analysis with Optistruct on the same model too.

The following is an excerpt of dat data.

 

INIT MASTER(S)
NASTRAN SYSTEM(319)=1
ID Neo66B,Femap
SOL SEMODES
TIME 10000
CEND
  TITLE = MSC/MD Nastran モード 解析セット
  ECHO = NONE
  MFLUID = 1
  DISPLACEMENT(PLOT) = ALL
  METHOD = 1
BEGIN BULK
$ ***************************************************************************
$   Written by : Femap with NX Nastran
$   Version    : 11.1.1
$   Translator : MSC/MD Nastran
$   From Model : \Neo66BC_Hull-vibration_Standard.modfem
$   Date       : Mon Jul 14 08:00:18 2014
$ ***************************************************************************
$
PARAM,POST,-1
PARAM,OGEOM,NO
PARAM,AUTOSPC,YES
PARAM,GRDPNT,0
EIGRL          1      .5     30.               0                    MASS
CORD2C         1       0      0.      0.      0.      0.      0.      1.+FEMAPC1
+FEMAPC1      1.      0.      1.        
CORD2S         2       0      0.      0.      0.      0.      0.      1.+FEMAPC2
+FEMAPC2      1.      0.      1.        
$ Femap with NX Nastran Constraint Set 1 : ASET
ASET           3     123
...
ASET       50126     123
$ Femap with NX Nastran Property 20108000 : Mat01_t8.0
PSHELL  20108000       1      8.       1               1              0.
...           
ELIST          1  200001  200002  200003  200004  200005  200006  200007+       
...
+         208872  208873  208874  208875  208876  208877                
$ Femap with NX Nastran Region 1 : 無題
MFLUID         1       0   5375. 1.025-9       1               N       N
ENDDATA

Q.Nguyen-Dai

NX Nastran (Femap) has some different card comparing to Altair's Optistruct. So you have to do attention to this conversion.

FaroukM

Hey,

 

Try to import your *.dat file using :

 

Then redefine your configuration : Eigenvalues solver ..... and then solve them with OptiStruct.

 

If the model is large (you have a lot dof), try to use AMSES solver instead of Lanczos

 

Cheers,

 

seno

Tank you reply.

 

Import *.dat file and save as test.hm file

 

Add cmsmesh

 

Save as test.fem file and solve with optistruct

<?xml version="1.0" encoding="UTF-8"?>

 

So, this fatal error appeared

 

How do I resolve the error?

 

The following is an excerpt of fem data.

 

$$
$$ Optistruct Input Deck Generated by HyperMesh Version  : 2017.2.0.16
$$ Generated using HyperMesh-Optistruct Template Version : 2017.2
$$
$$   Template:  optistruct
$$
$$
$$ optistruct
$
TITLE = MSC/MD Nastran    [ h  　Z b g                            
  METHOD(STRUCTURE) =        1
  MFLUID =        1
DISPLACEMENT(PLOT) = ALL
$$------------------------------------------------------------------------------$
$$                      Case Control Cards                                      $
$$------------------------------------------------------------------------------$
INIT MASTER(S)
NASTRAN SYSTEM(319)=1
ID Neo66B,Femap
SOL SEMODES
TIME 10000
CEND
ECHO = NONE
$$--------------------------------------------------------------
$$ HYPERMESH TAGS 
$$--------------------------------------------------------------
$$BEGIN TAGS
$$END TAGS
$
BEGIN BULK
$$
$$  Stacking Information for Ply-Based Composite Definition
$$

...

...

...

ASET       50109     123
ASET       50126     123
$$
$$  MFLUID cards
$$
$HMNAME LOADCOL                2'MFLUID2'
$HWCOLOR LOADCOL               2       4
$$
MFLUID         2       0  5375.0 1.025-9       1               N       N
+         1.0+10
$
$$
$$  CMSMETH cards
$$
$HMNAME LOADCOL                4'CMSMETH'
$HWCOLOR LOADCOL               4       4
$$
CMSMETH 4       CB      30.0                       AMSES        

$
ENDDATA
$$
$$------------------------------------------------------------------------------$$
$$        Data Definition for AutoDV                                            $$
$$------------------------------------------------------------------------------$$
$$
$$-----------------------------------------------------------------------------$$
$$        Design Variables Card for Control Perturbations                      $$
$$-----------------------------------------------------------------------------$$
$$
$$------------------------------------------------------------------------------$
$$        Domain Element Definitions                                            $
$$------------------------------------------------------------------------------$
$$
$$------------------------------------------------------------------------------$$
$$            Control Perturbation                                              $$
$$------------------------------------------------------------------------------$$

PrasannaK

Hi, 

 

Altair Forum User said:

How do I resolve the error?

Can you share the .out file? 

 

Thank you

seno

Tank you reply.

 

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