INFEASIBLE DESIGN (AT LEAST ONE CONSTRAINT VIOLATED).

Sam George
Sam George Altair Community Member
edited August 2022 in Community Q&A

With stress upper bound as 10MPa, it works, but below 7 Mpa, it doesnt converge.

 

image

Tagged:

Answers

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited August 2022

    could you share the .out file?

     

    As you're decresing the stress limit, it is probably harder to converge, as you're pushing it harder.

  • Sam George
    Sam George Altair Community Member
    edited August 2022

    NOTE # 9199
    MSGLMT=STRICT is active, all messages will be printed.
    You can suppress some less important warning messages by use of
    MSGLMT=BRIEF or UNREF (in config file or in the input data).

    1 PARAM(s) were set:
    CHECKEL,NO

    *** WARNING 1932: PSOLID ID 10 is not referenced.



    *** WARNING # 7338
    GRID 49765 in DSHAPE card 10 is an isolated grid.

    *** WARNING # 7338
    GRID 49766 in DSHAPE card 10 is an isolated grid.

    *** WARNING # 7338
    GRID 49785 in DSHAPE card 10 is an isolated grid.

    *** WARNING # 7345
    Free-Shape detects nonequivalent elements or cracks near GRID 27902.

    *** WARNING # 7345
    Free-Shape detects nonequivalent elements or cracks near GRID 27902.

    *** WARNING # 7345
    Free-Shape detects nonequivalent elements or cracks near GRID 27909.

    *** INFORMATION # 815
    The total number of rigid elements, whose rotational dependent d.o.f.
    are removed because there is no need to constrain those d.o.f., is 18.

    NOTE # 1852
    AUTOMATIC SCREENING is activated.
    Use DSCREEN,AUTO,OFF to disable automatic screening.

    ************************************************************************

     

    FINITE ELEMENT MODEL DATA INFORMATION :
    ---------------------------------------

    Total # of Grids (Structural) : 75742
    Total # of Elements : 304214
    Total # of Rigid Elements : 18
    Total # of Rigid Element Constraints : 2304
    Total # of Degrees of Freedom : 228837
    (Structural)
    Total # of Non-zero Stiffness Terms : 4423938


    Element Type Information
    ------------------------

    CTETRA Elements : 304214

    Load and Boundary Information
    -----------------------------

    FORCE Sets : 1
    SPC Sets : 1

    Material and Property Information
    ---------------------------------

    PSOLID Cards : 2
    MAT1 Cards : 1

    ************************************************************************

     

    ************************************************************************

    OPTIMIZATION PROBLEM PARAMETERS :
    ---------------------------------

    Objective Function : Minimize Mass

    ------------------
    Response Summary :
    ------------------

    Number of mass responses : 1
    Number of stress responses : 904

    ------------------------
    Static Subcase Summary :
    ------------------------

    ---------- -------- ------- ---------------------
    Subcase ID SPC ID LOAD ID Preloading Subcase ID
    ---------- -------- ------- ---------------------
    10 10 11
    ---------- -------- ------- ---------------------

    ---------------------------
    Design Parameters Summary :
    ---------------------------

    Total # of free-shape cards : 1

    ---------------------------------
    Optimization Parameters Summary :
    ---------------------------------

    Maximum Number of Iterations : 30

    Convergence Tolerance : 5.0000E-03
    Step Size (Shape) : 0.2000

    Run Type : Free-Shape Optimization

    Restart from previous solution : No
    Run at location : Z:/sim_daten/z30/FEM/bijusa1/tesla_X/fem/closeout_freeshape/
    Scratch file directory : Z:/sim_daten/z30/FEM/bijusa1/tesla_X/fem/closeout_freeshape/
    Free space: 2568.884 GB
    Number of CPU processors : 1


    ************************************************************************

     

    ************************************************************************

    MEMORY ESTIMATION INFORMATION :
    -------------------------------

    Solver Type is: Sparse-Matrix Solver
    Direct Method

    Memory (RAM) Allocated in Preprocessor : 845 MB
    Estimated Memory (RAM) for Out of Core Solution : 795 MB
    Estimated Memory (RAM) for In-Core Solution : 845 MB
    (Note: The Minimum Memory Requirement is limited by Output Module.)

    DISK SPACE ESTIMATION INFORMATION :
    -----------------------------------

    Estimated Disk Space for Output Data Files : 519 MB
    Estimated Scratch Disk Space for In-Core Solution : 1226 MB
    Estimated Scratch Disk Space for Out of Core Solution : 1753 MB

    ************************************************************************


    BEGINNING OPTIMIZATION SOLUTION ....


    ************************************************************************

    OPTIMIZATION HISTORY INFORMATION :
    ----------------------------------


    ITERATION 0

    *** INFORMATION # 3454
    MPC, RBE# (and other rigids) and JOINTG constraints for
    subcase 10 will be enforced with lagrange multipliers.

    List of Auto-SPC d.o.f.s for loadcase 10
    Total number of Auto-SPC d.o.f.s = 2304

    ------------------------------
    Grid No. Component
    ------------------------------
    196 4 5 6
    197 4 5 6
    198 4 5 6
    199 4 5 6
    200 4 5 6
    201 4 5 6
    202 4 5 6
    203 4 5 6
    204 4 5 6
    205 4 5 6
    206 4 5 6
    207 4 5 6
    208 4 5 6
    209 4 5 6
    210 4 5 6
    211 4 5 6
    212 4 5 6
    213 4 5 6
    214 4 5 6
    215 4 5 6
    216 4 5 6
    217 4 5 6
    218 4 5 6
    219 4 5 6
    220 4 5 6
    221 4 5 6
    222 4 5 6
    223 4 5 6
    224 4 5 6
    225 4 5 6
    226 4 5 6
    227 4 5 6
    228 4 5 6
    229 4 5 6
    ------------------------------

    Because of PARAM, PRGPST, 100, Auto-SPC printing is limited to 100 dofs.


    (Scratch disk space usage for starting iteration = 1024 MB)
    (Running in-core solution)

    Objective Function (Minimize MASS ) = 2.55901E-04
    Maximum Constraint Violation % = 0.53291E+02
    Volume = 2.13250E+05 Mass = 2.55901E-04

    Subcase Compliance Epsilon
    10 5.206536E+00 2.217249E-10

    Note : Epsilon = Residual Strain Energy Ratio.


    RETAINED RESPONSES TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Objective Viol.
    User-ID Label /RANDPS Element/ Comp Value Reference/ %
    /Model MID/PID/ /Reg Constraint
    +Frqncy Mode No. Bound
    /Times
    ------------------------------------------------------------------------------------
    10 MASS mass -- -- TOTL 2.559E-04 MIN
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    ------------------------------------------------------------------------------------

    MOST VIOLATED CONSTRAINTS TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Constraint Viol.
    User-ID Label /RANDPS Element/ Comp Value Bound %
    /Model MID/PID/ /Reg
    +Frqncy Mode No.
    /Times
    ------------------------------------------------------------------------------------
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    ------------------------------------------------------------------------------------

    ITERATION 1

    Objective Function (Minimize MASS ) = 2.55901E-04 % change = 0.00
    Maximum Constraint Violation % = 0.53291E+02
    Volume = 2.13250E+05 Mass = 2.55901E-04

    Subcase Compliance Epsilon
    10 5.206536E+00 2.217249E-10

    Note : Epsilon = Residual Strain Energy Ratio.


    RETAINED RESPONSES TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Objective Viol.
    User-ID Label /RANDPS Element/ Comp Value Reference/ %
    /Model MID/PID/ /Reg Constraint
    +Frqncy Mode No. Bound
    /Times
    ------------------------------------------------------------------------------------
    10 MASS mass -- -- TOTL 2.559E-04 MIN
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    ------------------------------------------------------------------------------------

    MOST VIOLATED CONSTRAINTS TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Constraint Viol.
    User-ID Label /RANDPS Element/ Comp Value Bound %
    /Model MID/PID/ /Reg
    +Frqncy Mode No.
    /Times
    ------------------------------------------------------------------------------------
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    ------------------------------------------------------------------------------------

    *** WARNING # 7351
    The optimization process is terminated due to excessive mesh distortion.
    Please check the .HM.elcheck.cmf file for a list of distorted elements.
    If the final design is not satisfactory, it is recommended to remesh it
    to improve the mesh quality, and perform a second stage optimization.

    ************************************************************************
    INFEASIBLE DESIGN (AT LEAST ONE CONSTRAINT VIOLATED).

    ************************************************************************

    RESOURCE USAGE INFORMATION
    --------------------------

    MAXIMUM MEMORY USED 845 MB
    IN ADDITION 33 MB MEMORY WAS ALLOCATED FOR TEMPORARY USE
    MAXIMUM DISK SPACE USED 1212 MB

    ************************************************************************


    ************************************************************************

    COMPUTE TIME INFORMATION
    ------------------------

    EXECUTION STARTED Tue Aug 30 11:26:27 2022
    EXECUTION COMPLETED Tue Aug 30 11:27:49 2022
    ELAPSED TIME 00:01:21
    CPU TIME 00:00:49

    ************************************************************************


    ***** END OF REPORT *****

    For Useful OptiStruct Tips and Tricks, go to the URL:
    http://www.altairhyperworks.com/tips.aspx

  • Sam George
    Sam George Altair Community Member
    edited August 2022
    Sam George said:

    NOTE # 9199
    MSGLMT=STRICT is active, all messages will be printed.
    You can suppress some less important warning messages by use of
    MSGLMT=BRIEF or UNREF (in config file or in the input data).

    1 PARAM(s) were set:
    CHECKEL,NO

    *** WARNING 1932: PSOLID ID 10 is not referenced.



    *** WARNING # 7338
    GRID 49765 in DSHAPE card 10 is an isolated grid.

    *** WARNING # 7338
    GRID 49766 in DSHAPE card 10 is an isolated grid.

    *** WARNING # 7338
    GRID 49785 in DSHAPE card 10 is an isolated grid.

    *** WARNING # 7345
    Free-Shape detects nonequivalent elements or cracks near GRID 27902.

    *** WARNING # 7345
    Free-Shape detects nonequivalent elements or cracks near GRID 27902.

    *** WARNING # 7345
    Free-Shape detects nonequivalent elements or cracks near GRID 27909.

    *** INFORMATION # 815
    The total number of rigid elements, whose rotational dependent d.o.f.
    are removed because there is no need to constrain those d.o.f., is 18.

    NOTE # 1852
    AUTOMATIC SCREENING is activated.
    Use DSCREEN,AUTO,OFF to disable automatic screening.

    ************************************************************************

     

    FINITE ELEMENT MODEL DATA INFORMATION :
    ---------------------------------------

    Total # of Grids (Structural) : 75742
    Total # of Elements : 304214
    Total # of Rigid Elements : 18
    Total # of Rigid Element Constraints : 2304
    Total # of Degrees of Freedom : 228837
    (Structural)
    Total # of Non-zero Stiffness Terms : 4423938


    Element Type Information
    ------------------------

    CTETRA Elements : 304214

    Load and Boundary Information
    -----------------------------

    FORCE Sets : 1
    SPC Sets : 1

    Material and Property Information
    ---------------------------------

    PSOLID Cards : 2
    MAT1 Cards : 1

    ************************************************************************

     

    ************************************************************************

    OPTIMIZATION PROBLEM PARAMETERS :
    ---------------------------------

    Objective Function : Minimize Mass

    ------------------
    Response Summary :
    ------------------

    Number of mass responses : 1
    Number of stress responses : 904

    ------------------------
    Static Subcase Summary :
    ------------------------

    ---------- -------- ------- ---------------------
    Subcase ID SPC ID LOAD ID Preloading Subcase ID
    ---------- -------- ------- ---------------------
    10 10 11
    ---------- -------- ------- ---------------------

    ---------------------------
    Design Parameters Summary :
    ---------------------------

    Total # of free-shape cards : 1

    ---------------------------------
    Optimization Parameters Summary :
    ---------------------------------

    Maximum Number of Iterations : 30

    Convergence Tolerance : 5.0000E-03
    Step Size (Shape) : 0.2000

    Run Type : Free-Shape Optimization

    Restart from previous solution : No
    Run at location : Z:/sim_daten/z30/FEM/bijusa1/tesla_X/fem/closeout_freeshape/
    Scratch file directory : Z:/sim_daten/z30/FEM/bijusa1/tesla_X/fem/closeout_freeshape/
    Free space: 2568.884 GB
    Number of CPU processors : 1


    ************************************************************************

     

    ************************************************************************

    MEMORY ESTIMATION INFORMATION :
    -------------------------------

    Solver Type is: Sparse-Matrix Solver
    Direct Method

    Memory (RAM) Allocated in Preprocessor : 845 MB
    Estimated Memory (RAM) for Out of Core Solution : 795 MB
    Estimated Memory (RAM) for In-Core Solution : 845 MB
    (Note: The Minimum Memory Requirement is limited by Output Module.)

    DISK SPACE ESTIMATION INFORMATION :
    -----------------------------------

    Estimated Disk Space for Output Data Files : 519 MB
    Estimated Scratch Disk Space for In-Core Solution : 1226 MB
    Estimated Scratch Disk Space for Out of Core Solution : 1753 MB

    ************************************************************************


    BEGINNING OPTIMIZATION SOLUTION ....


    ************************************************************************

    OPTIMIZATION HISTORY INFORMATION :
    ----------------------------------


    ITERATION 0

    *** INFORMATION # 3454
    MPC, RBE# (and other rigids) and JOINTG constraints for
    subcase 10 will be enforced with lagrange multipliers.

    List of Auto-SPC d.o.f.s for loadcase 10
    Total number of Auto-SPC d.o.f.s = 2304

    ------------------------------
    Grid No. Component
    ------------------------------
    196 4 5 6
    197 4 5 6
    198 4 5 6
    199 4 5 6
    200 4 5 6
    201 4 5 6
    202 4 5 6
    203 4 5 6
    204 4 5 6
    205 4 5 6
    206 4 5 6
    207 4 5 6
    208 4 5 6
    209 4 5 6
    210 4 5 6
    211 4 5 6
    212 4 5 6
    213 4 5 6
    214 4 5 6
    215 4 5 6
    216 4 5 6
    217 4 5 6
    218 4 5 6
    219 4 5 6
    220 4 5 6
    221 4 5 6
    222 4 5 6
    223 4 5 6
    224 4 5 6
    225 4 5 6
    226 4 5 6
    227 4 5 6
    228 4 5 6
    229 4 5 6
    ------------------------------

    Because of PARAM, PRGPST, 100, Auto-SPC printing is limited to 100 dofs.


    (Scratch disk space usage for starting iteration = 1024 MB)
    (Running in-core solution)

    Objective Function (Minimize MASS ) = 2.55901E-04
    Maximum Constraint Violation % = 0.53291E+02
    Volume = 2.13250E+05 Mass = 2.55901E-04

    Subcase Compliance Epsilon
    10 5.206536E+00 2.217249E-10

    Note : Epsilon = Residual Strain Energy Ratio.


    RETAINED RESPONSES TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Objective Viol.
    User-ID Label /RANDPS Element/ Comp Value Reference/ %
    /Model MID/PID/ /Reg Constraint
    +Frqncy Mode No. Bound
    /Times
    ------------------------------------------------------------------------------------
    10 MASS mass -- -- TOTL 2.559E-04 MIN
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    ------------------------------------------------------------------------------------

    MOST VIOLATED CONSTRAINTS TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Constraint Viol.
    User-ID Label /RANDPS Element/ Comp Value Bound %
    /Model MID/PID/ /Reg
    +Frqncy Mode No.
    /Times
    ------------------------------------------------------------------------------------
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    ------------------------------------------------------------------------------------

    ITERATION 1

    Objective Function (Minimize MASS ) = 2.55901E-04 % change = 0.00
    Maximum Constraint Violation % = 0.53291E+02
    Volume = 2.13250E+05 Mass = 2.55901E-04

    Subcase Compliance Epsilon
    10 5.206536E+00 2.217249E-10

    Note : Epsilon = Residual Strain Energy Ratio.


    RETAINED RESPONSES TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Objective Viol.
    User-ID Label /RANDPS Element/ Comp Value Reference/ %
    /Model MID/PID/ /Reg Constraint
    +Frqncy Mode No. Bound
    /Times
    ------------------------------------------------------------------------------------
    10 MASS mass -- -- TOTL 2.559E-04 MIN
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    ------------------------------------------------------------------------------------

    MOST VIOLATED CONSTRAINTS TABLE
    ------------------------------------------------------------------------------------
    Response Type Response Subcase Grid/ DOF/ Response Constraint Viol.
    User-ID Label /RANDPS Element/ Comp Value Bound %
    /Model MID/PID/ /Reg
    +Frqncy Mode No.
    /Times
    ------------------------------------------------------------------------------------
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 35926 SVM 9.197E+00 < 6.000E+00 53.3 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16083 SVM 8.826E+00 < 6.000E+00 47.1 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 16586 SVM 8.793E+00 < 6.000E+00 46.6 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34675 SVM 8.641E+00 < 6.000E+00 44.0 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    11 STRES stress 10 34715 SVM 8.598E+00 < 6.000E+00 43.3 V
    ------------------------------------------------------------------------------------

    *** WARNING # 7351
    The optimization process is terminated due to excessive mesh distortion.
    Please check the .HM.elcheck.cmf file for a list of distorted elements.
    If the final design is not satisfactory, it is recommended to remesh it
    to improve the mesh quality, and perform a second stage optimization.

    ************************************************************************
    INFEASIBLE DESIGN (AT LEAST ONE CONSTRAINT VIOLATED).

    ************************************************************************

    RESOURCE USAGE INFORMATION
    --------------------------

    MAXIMUM MEMORY USED 845 MB
    IN ADDITION 33 MB MEMORY WAS ALLOCATED FOR TEMPORARY USE
    MAXIMUM DISK SPACE USED 1212 MB

    ************************************************************************


    ************************************************************************

    COMPUTE TIME INFORMATION
    ------------------------

    EXECUTION STARTED Tue Aug 30 11:26:27 2022
    EXECUTION COMPLETED Tue Aug 30 11:27:49 2022
    ELAPSED TIME 00:01:21
    CPU TIME 00:00:49

    ************************************************************************


    ***** END OF REPORT *****

    For Useful OptiStruct Tips and Tricks, go to the URL:
    http://www.altairhyperworks.com/tips.aspx

    Would refining the mesh in concerned regions make a difference?

Categories