Hallo zusammen,
ich habe eine Massenskalierung mittels Zeitinkrementvorgabe durchgeführt, aber das Problem ist, dass die Skalierung nicht genau umgesetzt wird.
Meine Vorgabe für DT= 5.0E-08s. Wie man aber im folgenden sehen kann, wird das Zeitinkrement nicht genau auf diesen Wert gesetzt sondern an einen ziemlich ähnlichen, also z.B. 4.836E-08s.
Meine Frage ist nun warum Abaqus das macht?
Hier mal ein Ausschnitt des Statusfiles:
-------------------------------------------------------------------------------
STABLE TIME INCREMENT INFORMATION
-------------------------------------------------------------------------------
The stable time increment estimate for each element is based on
linearization about the initial state. The stable time increment estimates
do not account for mass scaling.
Initial time increment = 4.98663E-09
Statistics for all elements:
Mean = 5.45608E-09
Standard deviation = 2.83527E-10
Most critical elements:
Element number Rank Time increment Increment ratio
----------------------------------------------------------
417684 1 4.986627E-09 1.000000E+00
417804 2 4.986627E-09 1.000000E+00
418044 3 4.986627E-09 1.000000E+00
418164 4 4.986627E-09 1.000000E+00
418284 5 4.986627E-09 1.000000E+00
418524 6 4.986627E-09 1.000000E+00
418644 7 4.986627E-09 1.000000E+00
418764 8 4.986627E-09 1.000000E+00
419004 9 4.986627E-09 1.000000E+00
419124 10 4.986627E-09 1.000000E+00
***NOTE: Contact output has been requested for at least one contact pair
involving an analytical rigid surface. For each of these pairs,
contact output will not be provided for the analytical surface, but
will be provided for the opposing surface.
Abaqus/Explicit 6.9-1 DATE 09-May-2011 TIME 10:08:41
The double precision Abaqus/Explicit executable will be used in this analysis.
The model has been decomposed into 8 domains.
Domain level parallelization will be used with 8 processors.
-------------------------------------------------------------------------------
SOLUTION PROGRESS
-------------------------------------------------------------------------------
STEP 1 ORIGIN 0.0000
Total memory used for step 1 is approximately 1.8 gigabytes.
Element by element stable time estimation algorithm will be used.
Scaling factor: 1.0000
Variable mass scaling factor at zero increment: 1.0000
STEP TOTAL CPU STABLE CRITICAL KINETIC TOTAL PERCENT
INCREMENT TIME TIME TIME INCREMENT ELEMENT ENERGY ENERGY CHNG MASS
0 0.000E+00 0.000E+00 00:00:00 4.831E-08 10 1.644E+01 1.644E+01 8.582E+02
ODB Field Frame Number 0 of 1 requested intervals at increment zero.
423 2.032E-05 2.032E-05 00:00:51 4.468E-08 499512 1.620E+01 1.617E+01 8.582E+02
847 4.067E-05 4.067E-05 00:01:46 4.836E-08 485109 1.701E+01 1.617E+01 8.582E+02
1276 6.099E-05 6.099E-05 00:02:37 4.836E-08 499389 1.560E+01 1.618E+01 8.582E+02
1701 8.132E-05 8.132E-05 00:03:32 4.836E-08 485109 1.598E+01 1.618E+01 8.582E+02
2132 1.017E-04 1.017E-04 00:04:27 4.836E-08 499632 1.417E+01 1.618E+01 8.582E+02
2558 1.220E-04 1.220E-04 00:05:18 4.836E-08 484989 1.424E+01 1.618E+01 8.582E+02
2987 1.423E-04 1.423E-04 00:06:10 4.794E-08 499150 1.217E+01 1.618E+01 8.582E+02
3413 1.627E-04 1.627E-04 00:07:03 4.836E-08 485110 1.215E+01 1.618E+01 8.582E+02
3841 1.830E-04 1.830E-04 00:07:55 4.811E-08 499507 9.974E+00 1.618E+01 8.582E+02
4266 2.031E-04 2.031E-04 00:08:51 4.597E-08 485108 9.335E+00 1.618E+01 8.582E+02
Restart Number 1 at 2.03135E-04
4696 2.235E-04 2.235E-04 00:09:46 4.836E-08 499270 7.104E+00 1.618E+01 8.582E+02
5122 2.438E-04 2.438E-04 00:10:36 4.836E-08 499270 6.941E+00 1.618E+01 8.582E+02
5551 2.641E-04 2.641E-04 00:11:31 4.760E-08 499028 4.790E+00 1.618E+01 8.582E+02
5983 2.845E-04 2.845E-04 00:12:24 4.836E-08 499269 4.814E+00 1.618E+01 8.582E+02
6414 3.048E-04 3.048E-04 00:13:15 4.836E-08 499270 2.894E+00 1.618E+01 8.582E+02
6843 3.252E-04 3.252E-04 00:14:09 4.836E-08 499149 3.109E+00 1.618E+01 8.582E+02
7271 3.455E-04 3.455E-04 00:15:00 4.777E-08 485110 1.302E+00 1.619E+01 8.582E+02
7704 3.658E-04 3.658E-04 00:15:54 4.836E-08 499150 1.853E+00 1.617E+01 8.582E+02
8135 3.862E-04 3.862E-04 00:16:48 4.836E-08 499150 3.510E-01 1.617E+01 8.582E+02
8562 4.063E-04 4.063E-04 00:17:41 4.631E-08 484392 1.221E+00 1.617E+01 8.582E+02
Restart Number 2 at 4.06250E-04
ODB Field Frame Number 1 of 1 requested intervals at 4.062500E-04
THE ANALYSIS HAS COMPLETED SUCCESSFULLY
Danke schon mal!
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