LS-DYNA常见问题汇总2.0 yuminhust2005 2008-10-12 *KEYWORD $
$ Example: implicit-explicit switching for static initialization $
$ Procedure: $
$ - apply static end moment from time=0 to time=0.010 using 20 steps $
$ - remove applied load at time=0.010 $
$ - switch to explicit dynamic at time=0.010 (use load curve ID=3) $
$ - continue dynamic simulation for two periods of lowest mode (15 ms) $
*TITLE
cantilevered shell strip w/ end moment $
*control_structured *CONTROL_TERMINATION 0.025 $
*CONTROL_IMPLICIT_GENERAL
$ imflag dt0 iefs -3 0.0005 0 $
*DEFINE_CURVE 3 0.00000, 1.0 0.00999, 1.0 0.01000, 0.0 1.00000, 0.0 $
*CONTROL_IMPLICIT_SOLUTION
$ nlsolvr ilimit maxref dctol ectol rctol lstol 0 0 0 0.00 0.00 0 0 $ dnorm divflag inistif 0 0 0 *CONTROL_IMPLICIT_SOLVER
$ lsolvr prntflg negeig 0 0 0 *CONTROL_IMPLICIT_AUTO
$ iauto iteopt itewin dtmin dtmax 0 0 0 0.00 0 $
$-------------- $
$ uncomment this keyword to perform eigenvalue analysis $$
第 26 页
LS-DYNA常见问题汇总2.0 yuminhust2005 2008-10-12 $*CONTROL_IMPLICIT_EIGENVALUE $$ neigv $ 5 $
$ r e s u l t s o f e i g e n v a l u e a n a l y s i s: $
$ frequency number= 1 frequency (hertz)= .13537E+03 period= .73873E-02 $ frequency number= 2 frequency (hertz)= .84065E+03 period= .11896E-02 $ frequency number= 3 frequency (hertz)= .10911E+04 period= .91648E-03 $ frequency number= 4 frequency (hertz)= .13145E+04 period= .76072E-03 $ frequency number= 5 frequency (hertz)= .23558E+04 period= .42448E-03 $
$-------------- $
*LOAD_NODE_SET
$ nsid dof lcid sf 99 7 98 1.0 $
*SET_NODE_LIST 99
16 32 48 $
*DEFINE_CURVE 98
0.00000, 0.0 0.01000, 10.0 0.01001, 0.0 1.00000, 0.0 $-------------- $
*CONTROL_SHELL
40.0 2 -2 1 2 1 1 *DATABASE_BINARY_D3PLOT 0.0001 *MAT_ELASTIC
1 7.000E-04 3.000E+07 3.000E-01 *SECTION_SHELL
1 6 8.333E-01 3.000E+00 3.000E+00 0.000E+00 0 1.000E-01 1.000E-01 1.000E-01 1.000E-01 0.000E+00 *PART
cantilevered shell
1 1 1 0 0 0 0 0 $ 1 1 1 0 0 0 0 0 *NODES
1 0.000000000E+00 0.000000000E+00 0.000000000E+00 7 7 2 3.333333433E-01 0.000000000E+00 0.000000000E+00 0 0 3 6.666666865E-01 0.000000000E+00 0.000000000E+00 0 0 4 1.000000000E+00 0.000000000E+00 0.000000000E+00 0 0
第 27 页
LS-DYNA常见问题汇总2.0 yuminhust2005 2008-10-12 5 1.333333373E+00 0.000000000E+00 0.000000000E+00 0 0 6 1.666666627E+00 0.000000000E+00-1.110223025E-16 0 0 7 2.000000000E+00 0.000000000E+00 0.000000000E+00 0 0 8 2.333333254E+00 0.000000000E+00-1.110223025E-16 0 0 9 2.666666746E+00 0.000000000E+00 0.000000000E+00 0 0 10 3.000000000E+00 0.000000000E+00-1.110223025E-16 0 0 11 3.333333254E+00 0.000000000E+00 0.000000000E+00 0 0 12 3.666666746E+00 0.000000000E+00 0.000000000E+00 0 0 13 4.000000000E+00 0.000000000E+00 0.000000000E+00 0 0 14 4.333333492E+00 0.000000000E+00 0.000000000E+00 0 0 15 4.666666508E+00 0.000000000E+00 0.000000000E+00 0 0 16 5.000000000E+00 0.000000000E+00 0.000000000E+00 0 0 17 0.000000000E+00 0.000000000E+00 5.000000000E-01 7 7 18 3.333333433E-01 0.000000000E+00 5.000000000E-01 0 0 19 6.666666865E-01 0.000000000E+00 5.000000000E-01 0 0 20 1.000000000E+00 0.000000000E+00 5.000000000E-01 0 0 21 1.333333373E+00 0.000000000E+00 5.000000000E-01 0 0 22 1.666666627E+00 0.000000000E+00 5.000000000E-01 0 0 23 2.000000000E+00 0.000000000E+00 5.000000000E-01 0 0 24 2.333333254E+00 0.000000000E+00 5.000000000E-01 0 0 25 2.666666746E+00 0.000000000E+00 5.000000000E-01 0 0 26 3.000000000E+00 0.000000000E+00 5.000000000E-01 0 0 27 3.333333254E+00 0.000000000E+00 5.000000000E-01 0 0 28 3.666666746E+00 0.000000000E+00 5.000000000E-01 0 0 29 4.000000000E+00 0.000000000E+00 5.000000000E-01 0 0 30 4.333333492E+00 0.000000000E+00 5.000000000E-01 0 0 31 4.666666508E+00 0.000000000E+00 5.000000000E-01 0 0 32 5.000000000E+00 0.000000000E+00 5.000000000E-01 0 0 33 0.000000000E+00 0.000000000E+00 1.000000000E+00 7 7 34 3.333333433E-01 0.000000000E+00 1.000000000E+00 0 0 35 6.666666865E-01 0.000000000E+00 1.000000000E+00 0 0 36 1.000000000E+00 0.000000000E+00 1.000000000E+00 0 0 37 1.333333373E+00 0.000000000E+00 1.000000000E+00 0 0 38 1.666666627E+00 0.000000000E+00 1.000000000E+00 0 0 39 2.000000000E+00 0.000000000E+00 1.000000000E+00 0 0 40 2.333333254E+00 0.000000000E+00 1.000000000E+00 0 0 41 2.666666746E+00 0.000000000E+00 1.000000000E+00 0 0 42 3.000000000E+00 0.000000000E+00 1.000000000E+00 0 0 43 3.333333254E+00 0.000000000E+00 1.000000000E+00 0 0 44 3.666666746E+00 0.000000000E+00 1.000000000E+00 0 0 45 4.000000000E+00 0.000000000E+00 1.000000000E+00 0 0 46 4.333333492E+00 0.000000000E+00 1.000000000E+00 0 0 47 4.666666508E+00 0.000000000E+00 1.000000000E+00 0 0 48 5.000000000E+00 0.000000000E+00 1.000000000E+00 0 0 *ELEMENT_SHELL
1 1 1 17 18 2 2 1 2 18 19 3 3 1 3 19 20 4
第 28 页
LS-DYNA常见问题汇总2.0 yuminhust2005 2008-10-12 4 1 4 20 21 5 5 1 5 21 22 6 6 1 6 22 23 7 7 1 7 23 24 8 8 1 8 24 25 9 9 1 9 25 26 10 10 1 10 26 27 11 11 1 11 27 28 12 12 1 12 28 29 13 13 1 13 29 30 14 14 1 14 30 31 15 15 1 15 31 32 16 16 1 17 33 34 18 17 1 18 34 35 19 18 1 19 35 36 20 19 1 20 36 37 21 20 1 21 37 38 22 21 1 22 38 39 23 22 1 23 39 40 24 23 1 24 40 41 25 24 1 25 41 42 26 25 1 26 42 43 27 26 1 27 43 44 28 27 1 28 44 45 29 28 1 29 45 46 30 29 1 30 46 47 31 30 1 31 47 48 32 *END
注意请用5434,5434a or 971版本运行上面的k文件，不要用6763单精度或者双精度版本(这两个版本在implicit求解方面似乎存在bug，隐式分析部分无法完成 )
第 29 页