LS-DYNA Error 60047（IMP+47）

[h zang]

Hello everyone, Error 60047 appeared recently when using LS-DYNA for implicit calculation. The details are as follows:

“AUTOSPC detected very large entries in the assembled matrix. There are probably caused by overflow during elemental matrix computations. This could be casued by an energy explosion. Recommend switching to the REAL*8 version of LS-DYNA.”

So how do I switch to the REAL*8 version of LS-DYNA?
Grateful for your answer.

[Daniele Speziani]

Hi Zang,

Did you check your model with eigenvalue analysis? Is you model properly constrained? 

I have never faced such an error but I do not think that changing the float precision will change your simulation results.

Regards

Daniele

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[l...@schwer.net]

This message means to try using a double precision version of LS-DYNA.

Request a recent double precision version through your license provided.

                                --len

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[James M. Kennedy]

Dear Zang,

 

https://www.dynasupport.com/howtos/implicit/implicit-general-remarks

 

General remarks on implicit time integration

 

To run an implicit analysis in LS-DYNA, you'll need at least a  *CONTROL_IMPLICIT_GENERAL command to flag the solution as implicit and to set the step size.  

It is strongly recommended that the latest DOUBLE PRECISION executable be used.

 

https://www.dynasupport.com/howtos/general/double-precision

 

Single precision executables have "_s" in the filename whereas double precision executables have "_d" in the filename. Double precision run times will be approximately 30% longer than single precision run times (varies somewhat depending on platform).

 

Sincerely,

James M. Kennedy

KBS2 Inc.

June 15, 2022

 

From: ls-d...@googlegroups.com [mailto:ls-d...@googlegroups.com] On Behalf Of h zang
Sent: Wednesday, June 15, 2022 2:58 AM
To: LS-DYNA2 <ls-d...@googlegroups.com>
Subject: [LS-DYNA2] LS-DYNA Error 60047（IMP+47）

 

Hello everyone, Error 60047 appeared recently when using LS-DYNA for implicit calculation. The details are as follows:

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