question about UEL

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question about UEL

Nader-2
Hello everybody,

I just would like to know what is the maximum size of the array
PROPS() in the subroutine UEL
(in fact i would like to enter a large amount of data (for example
10000 )from a table  in this array to define all the stiffnesses from
a non linear material ).
Thank you,

Nader









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Re: question about UEL

Uday komaragiri
I dont know if there is a maximum array size for PROPS (which I dont
think so) but there is a maximum of 8 per line while you write it in
the input file.

Cheers,
uday.


On 1/18/06, Nader <[hidden email]> wrote:

> Hello everybody,
>
> I just would like to know what is the maximum size of the array
> PROPS() in the subroutine UEL
> (in fact i would like to enter a large amount of data (for example
> 10000 )from a table  in this array to define all the stiffnesses from
> a non linear material ).
> Thank you,
>
> Nader
>
>
>
>
>
>
>
>
>
> Community email addresses:
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>
>




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ABAQUS run on sgi altix 330

prapurna mv
Dear All,

    I am using a SGI altix 330  eight CPU machine for
abaqus runs.
But the only one cpu it is using. Even i have used the
command for multi cpu

abq653 job int cpus=8

Please advice how to configure the machine

Regards
Prapurna


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Re: ABAQUS run on sgi altix 330

Benz-2
Hi, I work on an Altix too, but with 4Cpus, very good machine :)

You have the good syntax for requestion a multicpu analysis, but
have you got enough tokens ? I know that running with 2 cpu a job
will get 5+1 tokens, instead of 5 tokens for only 1 cpu. So in fact
if you have 10 tokens (i.e. 2 licenses), you'll be able to run only
ONE job with 2 cpus !! That is not a fair commercial policy, there
is not that problem with Ansys....!
So I think that with 8 cpus, you must have 5+8 tokens ??? Do you
have them ? Have you tried to run the job with 2, then 3, then 4...
cpus ?

BenZ.

--- In [hidden email], prapurna mv <mvprapurna@y...> wrote:

>
> Dear All,
>
>     I am using a SGI altix 330  eight CPU machine for
> abaqus runs.
> But the only one cpu it is using. Even i have used the
> command for multi cpu
>
> abq653 job int cpus=8
>
> Please advice how to configure the machine
>
> Regards
> Prapurna
>
>
> __________________________________________________
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underground explosion loads

Nabil Nagy
Hi all
  I wonder if ABAQUS has the facilites to simulate the underground explosions ( inside soil ) or not ? as it is stated in the manuals that the accoustics insident waves loads applied in air and water medium ? so, what about the soil medium
  Thanks
  nm



                       
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Re: ABAQUS run on sgi altix 330

Fernando-6
In reply to this post by Benz-2
Hi guys,

> That is not a fair commercial policy, there is not that problem with
> Ansys....!

Isn't "fair" a little too strong? Please don't take this as a flame,
it isn't, but I think it is a business decision on the part of ABAQUS:
you get the full code, for unlimited problem size, and if you want
your problems to run faster on multi-cpu machines, you have to pay
more, depending on how fast you want to go (assuming that you have the
hardware, of course). With ANSYS, you pay for each program feature,
and some of them have limited problem size. And if you want to have
parallel support, you have to pay for that module too. I haven't used
ANSYS in a multi-cpu environment, so I don't know about the number of
licenses it uses under those conditions...

> So I think that with 8 cpus, you must have 5+8 tokens ??? Do you
> have them ? Have you tried to run the job with 2, then 3, then 4...
> cpus ?

ABAQUS wants 4+N tokens for a run, where N is the number of CPUs you
want it to use. I think, however, that this is not "linear", i.e. up
from a certain number of CPUs, it will not request that many tokens.

Also, check your grammar: you can submit in either of these forms, but
you cannot mix them:
abaqus job=yourjob user=yoursubroutine cpus=4
abaqus -job yourjob -user yoursubroutine -cpus 4

Hope this helps,
Fernando






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Re: question about UEL

Fernando-6
In reply to this post by Nader-2
Hi Nader,

> I just would like to know what is the maximum size of the array
> PROPS() in the subroutine UEL
> (in fact i would like to enter a large amount of data (for example
> 10000 )from a table  in this array to define all the stiffnesses from
> a non linear material ).

If you need to input that much data, why don't you read it from a file
and load it into a named common in the UEL? Just an idea...

Fernando






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Re: ABAQUS run on sgi altix 330, a post from a member emailed to me

Benz-2
In reply to this post by prapurna mv
Dear Prapurna,


Some time back I faced a crazy behavior that abaqus was not taking
multi-cpus in spite of having enough tokens. The workaround was to
set
following line on abaqus_v6.env file
cpus=2 (in your case 8)

While I regularly use multi-cpus with out this option in env file as
well;
some times I had this strange case. See if this helps.

BTW for 8 cpus you would need 4+8 = 12 tokens

Regards,
Sridharan


--- In [hidden email], prapurna mv <mvprapurna@y...> wrote:

>
> Dear All,
>
>     I am using a SGI altix 330  eight CPU machine for
> abaqus runs.
> But the only one cpu it is using. Even i have used the
> command for multi cpu
>
> abq653 job int cpus=8
>
> Please advice how to configure the machine
>
> Regards
> Prapurna
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
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Re: underground explosion loads

Dave Lindeman
In reply to this post by Nabil Nagy
ABAQUS/Explicit should have the capabilities.  See *EOS, *DETONATION POINT,
etc.  You might also want to check out AUTODYN (www.autodyn.com).

Regards,

Dave

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----- Original Message -----
From: "Nabil Nagy" <[hidden email]>
To: <[hidden email]>
Sent: Friday, January 20, 2006 2:45 AM
Subject: [ABAQUS] underground explosion loads


> Hi all
>   I wonder if ABAQUS has the facilites to simulate the underground
explosions ( inside soil ) or not ? as it is stated in the manuals that the
accoustics insident waves loads applied in air and water medium ? so, what
about the soil medium
>   Thanks
>   nm
>
>
>
>
> ---------------------------------
> Yahoo! Photos
>  Got holiday prints? See all the ways to get quality prints in your hands
ASAP.

>
> [Non-text portions of this message have been removed]
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Re: underground explosion loads

Nabil Nagy
Thank you Dave very much
   
  how can i apply taransmitting boundary for a soil to simulate wave propagation to infinity . one method is to apply dashpot to the boundary can any one tell me how can i apply dashpots to the boundaries
  please i am in bad need for the answer
  Thanks
  nn

Dave Lindeman <[hidden email]> wrote:
  ABAQUS/Explicit should have the capabilities.  See *EOS, *DETONATION POINT,
etc.  You might also want to check out AUTODYN (www.autodyn.com).

Regards,

Dave

=============================================
Dave Lindeman              [hidden email]
Sr. CAE Specialist         (TEL) 651-733-6383
3M Company                 (FAX) 651-736-7615
=============================================

----- Original Message -----
From: "Nabil Nagy" <[hidden email]>
To: <[hidden email]>
Sent: Friday, January 20, 2006 2:45 AM
Subject: [ABAQUS] underground explosion loads


> Hi all
>   I wonder if ABAQUS has the facilites to simulate the underground
explosions ( inside soil ) or not ? as it is stated in the manuals that the
accoustics insident waves loads applied in air and water medium ? so, what
about the soil medium
>   Thanks
>   nm
>
>
>
>
> ---------------------------------
> Yahoo! Photos
>  Got holiday prints? See all the ways to get quality prints in your hands
ASAP.

>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> Community email addresses:
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>
>
>



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Re: underground explosion loads

Dave Lindeman
The infinite elements might work (CINPE4, CIN3D8, etc.).

Regards,

Dave

=============================================
Dave Lindeman              [hidden email]
Sr. CAE Specialist         (TEL) 651-733-6383
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=============================================

----- Original Message -----
From: "Nabil Nagy" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, January 25, 2006 12:00 PM
Subject: Re: [ABAQUS] underground explosion loads


> Thank you Dave very much
>
>   how can i apply taransmitting boundary for a soil to simulate wave
propagation to infinity . one method is to apply dashpot to the boundary can
any one tell me how can i apply dashpots to the boundaries
>   please i am in bad need for the answer
>   Thanks
>   nn
>
> Dave Lindeman <[hidden email]> wrote:
>   ABAQUS/Explicit should have the capabilities.  See *EOS, *DETONATION
POINT,

> etc.  You might also want to check out AUTODYN (www.autodyn.com).
>
> Regards,
>
> Dave
>
> =============================================
> Dave Lindeman              [hidden email]
> Sr. CAE Specialist         (TEL) 651-733-6383
> 3M Company                 (FAX) 651-736-7615
> =============================================
>
> ----- Original Message -----
> From: "Nabil Nagy" <[hidden email]>
> To: <[hidden email]>
> Sent: Friday, January 20, 2006 2:45 AM
> Subject: [ABAQUS] underground explosion loads
>
>
> > Hi all
> >   I wonder if ABAQUS has the facilites to simulate the underground
> explosions ( inside soil ) or not ? as it is stated in the manuals that
the

> accoustics insident waves loads applied in air and water medium ? so, what
> about the soil medium
> >   Thanks
> >   nm
> >
> >
> >
> >
> > ---------------------------------
> > Yahoo! Photos
> >  Got holiday prints? See all the ways to get quality prints in your
hands

> ASAP.
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Re: underground explosion loads

samizdat43
In reply to this post by Nabil Nagy
Blast, explosion, and underwater load problems are usually done in
ABAQUS/Explicit. You have quite a few options.

If your interest is predominantly in the dilatational waves, and if
shear can be neglected, you can model the soil as an ACOUSTIC medium
and use the appropriate bulk modulus and density for the soil.
The "transmitting boundary" can be applied in /Explicit using
acoustic infinite elements or surface-based impedance conditions of
several types, in this case. The medium may cavitate in this case, if
you desire.

If shear is important, you must use "infinite elements" for the
absorbing boundary condition and solid (e.g. c3d8r) elements for the
soil. The infinite elements in /Explicit apply the dashpots
appropriately to absorb shear and dilatational waves at 90 degree
angle of incidence to the terminating mesh boundary.

It should be pointed out that the formulations of ACOUSTIC and SOLID
infinite elements are quite different in ABAQUS.

I would recommend performing the analysis both ways, including and
neglecting shear, to get the best engineering assessment of the
problem.


--- In [hidden email], Nabil Nagy <nabilmnagy@y...> wrote:
>
> Thank you Dave very much
>    
>   how can i apply taransmitting boundary for a soil to simulate
wave propagation to infinity . one method is to apply dashpot to the
boundary can any one tell me how can i apply dashpots to the
boundaries
>   please i am in bad need for the answer
>   Thanks
>   nn
>
> Dave Lindeman <ddlindeman@m...> wrote:
>   ABAQUS/Explicit should have the capabilities.  See *EOS,
*DETONATION POINT,

> etc.  You might also want to check out AUTODYN (www.autodyn.com).
>
> Regards,
>
> Dave
>
> =============================================
> Dave Lindeman              ddlindeman@m...
> Sr. CAE Specialist         (TEL) 651-733-6383
> 3M Company                 (FAX) 651-736-7615
> =============================================
>
> ----- Original Message -----
> From: "Nabil Nagy" <nabilmnagy@y...>
> To: <[hidden email]>
> Sent: Friday, January 20, 2006 2:45 AM
> Subject: [ABAQUS] underground explosion loads
>
>
> > Hi all
> >   I wonder if ABAQUS has the facilites to simulate the underground
> explosions ( inside soil ) or not ? as it is stated in the manuals
that the
> accoustics insident waves loads applied in air and water medium ?
so, what

> about the soil medium
> >   Thanks
> >   nm
> >
> >
> >
> >
> > ---------------------------------
> > Yahoo! Photos
> >  Got holiday prints? See all the ways to get quality prints in
your hands

> ASAP.
> >
> > [Non-text portions of this message have been removed]
> >
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