基础教程:弱FSI

LS-DYNA模拟显示简单FSI使用弱/易/易解FSI并发问题僵硬圆柱向Y方向偏移5秒后内速边界条件触发柱向右推自联结松散以来,两个求解者保留自己的独立定时段,固化机械求解器清晰运行FSI使用边界适配方法流体网格必须有结构边界片段不必重合,但几何必须保持近距离FSI触发时流水网状以拉格朗江方式移动,流水流以欧力安方式演化

*BOUNDARY_PRESCRIBED_MOTION_RIGID *KEYWORD *TITLE *CONTROL_TERMINATION *CONTROL_TIMESTEP *DATABASE_BINARY_D3PLOT *DEFINE_CURVE_FUNCTION *DEFINE_CURVE_TITLE *ELEMENT_SHELL *ICFD_BOUNDARY_FREESLIP *ICFD_BOUNDARY_FSI *ICFD_BOUNDARY_PRESCRIBED_VEL *ICFD_BOUNDARY_PRESCRIBED_PRE *ICFD_BOUNDARY_NONSLIP *ICFD_CONTROL_FSI *ICFD_CONTROL_TIME *ICFD_DATABASE_DRAG *ICFD_MAT *ICFD_PART *ICFD_PART_VOL *ICFD_SECTION *INCLUDE *MAT *MESH_BL  *MESH_SURFACE_ELEMENT *MESH_SURFACE_NODE *MESH_VOLUME *NODE *PARAMETER *PART *SECTION *END

18luck快乐彩Uniteds-LSSC-LSST-E-Mail-info@de-web:http://www.dyamore.de$ $X------------------------------------------------------------------------------ $X $X 1.运行文件原封不动US-DYNAR8.0(或更高)双精度X-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------$X------------------------------------------------------------------------------ $X *KEYWORD *TITLE ICFD Cylinder flow - Weak FSI *INCLUDE mesh.k *INCLUDE struc.k $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $                                                                              $ $                             PARAMETERS                                       $ $                                                                              $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *PARAMETER R    T_end      40.0 R  dt_plot      0.20 $ $--- Fluid $ R  v_inlet       1.0 Rrho_fluid       1.0 R mu_fluid     0.005  R dt_fluid     0.050 $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $                                                                              $ $                           ICFD CONTROL CARDS                                 $ $                                                                              $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_CONTROL_TIME $#     ttm        dt     &T_end &dt_fluid *ICFD_CONTROL_FSI $#     owc          0 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $                                                                              $ $                       ICFD PARTS/ SECTION/ MATERIAL                          $ $                                                                              $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_SECTION $#     sid             1 *ICFD_MAT $#     mid       flg        ro       vis                    1         1&rho_fluid &mu_fluid        *ICFD_PART $#     pid     secid       mid           1         1         1 *ICFD_PART $#     pid     secid       mid           2         1         1 *ICFD_PART $#     pid     secid       mid           3         1         1 *ICFD_PART $#     pid     secid       mid           4         1         1 *ICFD_PART_VOL $#     pid     secid       mid          10         1         1 $#   spid1     spid2     spid3     spid4          1         2         3         4 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $                                                                              $ $                    ICFD BOUNDARY/INITIAL CONDITIONS                          $ $                                                                              $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_BOUNDARY_PRESCRIBED_VEL $#     pid       dof       vad      lcid                 1         1         1         1       *ICFD_BOUNDARY_PRESCRIBED_VEL $#     pid       dof       vad      lcid                 1         2         1         2        *ICFD_BOUNDARY_PRESCRIBED_PRE $#     pid      lcid        sf     death     birth               2         2      *ICFD_BOUNDARY_FREESLIP $#     pid             3 *ICFD_BOUNDARY_NONSLIP $#     pid             4 *ICFD_BOUNDARY_FSI $#     pid             4 *DEFINE_CURVE_TITLE Velocity inlet $#    lcid      sidr       sfa       sfo      offa      offo    dattyp          1                $#                a1                  o1                  0.0                  0.5O06.0            &v_inlet              10000.0            &v_inlet *DEFINE_CURVE_TITLE Pressure outlet $#    lcid      sidr       sfa       sfo      offa      offo    dattyp          2 $#                a1                  o1                  0.0                 0.0              10000.0                 0.0 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $                                                                              $ $                            ICFD MESH KEYWORDS                                $ $                                                                              $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *MESH_VOLUME $#   volid              10 $#    pid1      pid2      pid3      pid4               1         2         3         4      *MESH_BL $#     pid     nelth          4         2 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $                                                                              $ $                             DATABASE (OUTPUT)                                $ $                                                                              $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_DATABASE_DRAG $#     pid          4 *DATABASE_BINARY_D3PLOT &dt_plot *end