Error when DRESP1 INERTIA or STRESS in DEQATN used in DESSUB
Altair EmployeeHi,
By trying to compute the buckling of stiffened panel, I encountered problems.
I have obtained following errors when I have performed a parametric optimization with DRESP1 INERTIA and STRESS in deqatn called by DESSUB. (OptiStruct 12.0.210 )
Here after an extract from the input file which is attached in the totality to this message:
DESOBJ(MIN)=24
SUBCASE 7
SPC = 26
LOAD = 25
DESSUB = 2
...
BEGIN BULK
...
DRESP2 47 R2_1 1
+ DRESP1 27
+ DRESP2 46
DRESP2 46 FE2_1 2
+ DRESP1 25
DRESP1 27 C2_1 STRESS PBEAML SNMAX 5
DRESP1 25 Ir2_1 INERTIA PBEAML ZZ 5
DRESP1 24 Mass MASS
DEQATN 2 F(I)=9.8696*70000*I/530**2/186
DEQATN 1 R(C,F)=F/C
DCONSTR 1 47 1.0
DCONADD 2 1
...
Here, the error codes coming from .out
*** ERROR # 1803 ***
INERTIA responses are not subcase dependent.
DRESP1 ID = 25
*** ERROR # 1810 ***
Number of responses in DRESP2 inconsistent.
DRESP2 ID = 47
This error occurs in module 'dppdrv1'.
I think to have deduced the following fact :
*** ERROR # 1803 *** owing to INERTIA card which seems be compatible with DESGLB but in my case, all the subcases are not concerned by this contraints.
*** ERROR # 1810 *** owing to STRESS response which seems not be detected by optistruct.
Does anyone have a solution or a explanation for this ?
Thank
MC
Answers
-
Please check details about DVPREL1.I have highlighted about PBEAML & DVPREL from user guide.
<?xml version="1.0" encoding="UTF-8"?>
0 -
Thank for your answer,
But I think the model respects these rules. It runs if we suppress the card DESSUB = 2, which proves that the DVPREL is not involved but the constraints.
Others ideas ?
0 -
Thanks for sharing this information.I will check & update you.
0 -
Hi Morgan,
Looks like Interia response can not be used as a function. Instead, as a workaround, Calculate Moment of Inertia using Summary option in HyperMesh and use this value in creating the response function.
In order to calculate MoI, Retain only the component(s) which you want to use as a part of response. Goto Post Page>> Summary>> Load (Load the file)>> OptiStruct>> Moment_of_Inertia. Click summary which will write MoI for the retained model.
0 -
Thank to both of you, I will use the DESVAR of the CBEAML in order to compute at each step the inertial moment.
0
