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dyna在计算sph模拟的流固耦合问题时,总是中止计算,是什么原因?

浏览: 2562 回答: 1

Input file: G:\sph\1.k                                                              



 The native file format       : 32-bit small endian

 Memory size from command line:   100000000

 Binary file                  : 32 bit IEEE selected

 expanding   memory to   100000000 starting ls-dyna


********  notice  ********  notice  ********  notice  ********

*                                                            *

* This is the LS-DYNA Finite Element code.                   *

*                                                            *

* Neither LSTC nor the authors assume any responsibility for *

* the validity, accuracy, or applicability of any results    *

* obtained from this system. The user must verify his own    *

* results.                                                   *

*                                                            *

* LSTC endeavors to make the LS-DYNA code as complete,       *

* accurate and easy to use as possible.                      *

* Suggestions and comments are welcomed.  Please report any  *

* errors encountered in either the documentation or results  *

* immediately to LSTC through your site focus.               *

*                                                            *

* Copyright (C) 1990-2009                                    *

* by Livermore Software Technology Corp. (LSTC)              *

* All rights reserved                                        *

*                                                            *

********  notice  ********  notice  ********  notice  ********

 contracting memory to           1 beginning of keyword reader

 expanding   memory to       21002  

 expanding   memory to      126706  

 expanding   memory to      171706  

 expanding   memory to      201706  

 expanding   memory to      406402  

 expanding   memory to      428084  

 expanding   memory to      480316  

 expanding   memory to      532548  

 expanding   memory to      553301  


 *** Warning extra card found in *CONTACT read 

             The following card will be ignored.

                                                                                

             Each Contact definition must start with a 

             *CONTACT_... card


 *** Warning extra card found in *CONTACT read 

             The following card will be ignored.

                                                                                

             Each Contact definition must start with a 

             *CONTACT_... card


 *** Warning extra card found in *CONTACT read 

             The following card will be ignored.

                                                                                

             Each Contact definition must start with a 

             *CONTACT_... card

 expanding   memory to      574401  

 expanding   memory to      594401  

 expanding   memory to      614401  

 expanding   memory to      634701  

 expanding   memory to      654701  

 expanding   memory to      681219  

 expanding   memory to      879435  

 expanding   memory to      903551  

 expanding   memory to      956243  

 expanding   memory to      978741  

 expanding   memory to     1000741  

 expanding   memory to     1046418  


 Memory required to process keyword     :      1046418

 contracting memory to           1 end of keyword reader


 LS-DYNA will perform a structural only analysis 


                                                                         

                         ls-dyna ls971s.50638 R4.2    date 02/04/2009

 expanding   memory to        2833 material, node and element data

 expanding   memory to        2920 material properties

 expanding   memory to       91801 element data

 expanding   memory to      249626 gradient of damage data

 expanding   memory to      707968 user control for contact interfaces

 expanding   memory to      707973 for boundary cond. vectorization

 expanding   memory to      720006 arbitrary element numbering input

 

 *** Warning warpage angle of element 2136129 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2136130 is 2.9004E+01 degrees   

 

 *** Warning warpage angle of element 2136131 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2136132 is 2.9031E+01 degrees   

 

 *** Warning warpage angle of element 2136148 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2136149 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2136150 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2136151 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2140129 is 2.8989E+01 degrees   

 

 *** Warning warpage angle of element 2140130 is 2.9004E+01 degrees   

 

 *** Warning warpage angle of element 2140131 is 2.9007E+01 degrees   

 

 *** Warning warpage angle of element 2140132 is 2.9009E+01 degrees   

 

 *** Warning warpage angle of element 2140148 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2140149 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2140150 is 2.9010E+01 degrees   

 

 *** Warning warpage angle of element 2140151 is 2.9010E+01 degrees   


 *** Warning Number of elements exceed warpage angle =          16

             min warpage angle                       = 0.2898871E+02

             max warpage angle                       = 0.2903063E+02

 expanding   memory to      787246 spc cards

 expanding   memory to     1181451 process element material data

 expanding   memory to     1183457 load curve data

 contracting memory to     1182077 regularize time history data

 contracting memory to     1182077 rigidwall definitions

 expanding   memory to     1215114 nodal constraint sets

 expanding   memory to     1216333 contact interfaces

 expanding   memory to     1250369 implicit contact 1

 expanding   memory to     1250371 implicit contact 2

 expanding   memory to     1525043 contact segment data 1

 expanding   memory to     1642991 contact segment data 2

 expanding   memory to     1763113 contact segment data 3

 expanding   memory to     2502086 contact definition

 expanding   memory to     2552084 rigid body

 expanding   memory to     2931438 contact friction

 expanding   memory to     2945388 rigid body b.c.

 expanding   memory to     3323694 joints

 contracting memory to     3323694 shell solid interfaces

 expanding   memory to     3835753 SPH elements

 expanding   memory to     3847638 discrete element

 contracting memory to     3847638 accelerometers

 expanding   memory to     3847738 rigid bodies for disp. termination

 contracting memory to     3847738 transformation to move nodes

 expanding   memory to     3847746 contact data

 expanding   memory to     3850008 contact data

 expanding   memory to     3850012 thermal expansion 0

 expanding   memory to     3850016 flexible body 2

 contracting memory to     3850016 implicit joints

 expanding   memory to     3898248 initialization phase


        slave surface of interface   =   2000153

        type                         =       a 3

        surface timestep             = 6.573E-05

        controlling slave node ID    =   6081274

        part ID of slave node        =   2000804

        current minimum time step    = 6.573E-05



        master surface of interface  =   2000153

        type                         =       a 3

        surface timestep             = 2.838E-05

        controlling master node ID   =   4320934

        part ID of master node       =   2000805

        current minimum time step    = 2.838E-05



        slave surface of interface   =   2000145

        type                         =       a 3

        surface timestep             = 1.000E+16

        controlling slave node ID    =     12024

        part ID of slave node        =   2327507

        current minimum time step    = 2.838E-05



        master surface of interface  =   2000145

        type                         =       a 3

        surface timestep             = 1.000E+16

        controlling master node ID   =     12024

        part ID of master node       =   2327507

        current minimum time step    = 2.838E-05



        slave surface of interface   =   2000154

        type                         =       a 5

        surface timestep             = 1.251E+02

        controlling slave node ID    =   6364249

        part ID of slave node        =   2327507

        current minimum time step    = 2.838E-05



        master surface of interface  =   2000154

        type                         =       a 5

        surface timestep             = 2.838E-05

        controlling master node ID   =   4320934

        part ID of master node       =   2000805

        current minimum time step    = 2.838E-05



        slave surface of interface   =   2000139

        type                         =        13

        surface timestep             = 2.838E-05

        controlling slave node ID    =   4320934

        part ID of slave node        =   2000805

        current minimum time step    = 2.838E-05



 The LS-DYNA time step size should not exceed     2.838E-05

 to avoid contact instabilities.  If the step size is

 bigger then scale the penalty of the offending surface.


 s t o r a g e   a l l o c a t i o n   


 Memory required to begin solution      :      3898248

 Additional dynamically allocated memory:      1081800

                                   Total:      4980048


全部回答 (1)

默认 最新
LYH333 2025年6月29日

有可能是NMNEIGH邻域粒子数太大,调小一些。

或者是FORM里面的算法选择的不对。

再就是平滑长度的两个选项调整一下


2025年6月29日
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