length=2 !定义体各种变量参数,长宽高 width=3 height=2 /prep7 et,1,63 !选用壳模型 et,2,30 !选用FLUID30单元,用于流固耦合问题 r,1,0.01 增加实常数,壳厚为0.01 mp,ex,1,2e11 mp,nuxy,1,0.3 mp,dens,1,7800 !定义壳单元的各种单元属性 mp,dens,2,1000 !定义Acoustics材料来描述流体材料-水 mp,sonc,2,1400 !定义声单元声速 mp,mu,0, !定义吸声系数 ! block,,length,,width,,height !建立长方体 esize,0.5 mshkey,1 ! type,1 !选择壳单元 mat,1 real,1 asel,u,loc,y,width !选择面 amesh,all !划分面单元 alls !选择所有项 ! type,2 !选择声单元 mat,2 vmesh,all !划分体单元 fini /solu antype,2 modopt,unsym,10 !非对称模态提取方法处理流固耦合问题 eqslv,front mxpand,10,,,1 nsel,s,loc,x, nsel,a,loc,x,length nsel,r,loc,y d,all,,,,,,ux,uy,uz, nsel,s,loc,y,width, d,all,pres,0 !上面几步为定义边界条件和约束 alls asel,u,loc,y,width, sfa,all,,fsi !定义流固耦合界面 alls !选择所有项 solv !求解 fini /post1 !后处理 set,first plnsol,u,sum,2,1 !显示图形 fini /PREP7 !定义壳材料与性质 !壳元素与材料 ET,1,shell63 $MP,EX,1,201E9 $MP,prxy,1,0.26 $MP,dens,1,7.85E3 $r,1,0.006 !流体元素与材料 ET,2,FLUID80 $MP,EX,2,1.5e9 $MP,DENS,2,0.84e3 $mp,visc,2,1.0e-10 !以下这个keyoption怎么用? 如过用1,就会显示[Element 877 may not have a positive Z coordinate IF KEYOPT(2) = 1.],显示这个错误代表要做什么修正吗?所以我暂时用KEYOPT(2) = 0就可以跑。 KEYOPT,2,2,0 !建立壳关键点 K,1,10,0,0 $K,2,10,0,12 !建立中心线关键点 k,3,0,0,0 $k,4,0,0,20 !定义壳壁线 L,1,2 $L,1,3 !以关键点3,4为中心线旋转360度生成壳体 AROTAT,all,,,,,,3,4,360 !划分壳体网格 AATT,1,1,1 $esize,2 $mshape,0,3D $mshkey,2 $amesh,all $alls !延伸出水位体积 VEXT,2,8,2,0,0,10,0,0,0 $vglue,all csys,1 !划分水位网格 type,2 $mat,2 $esize,2 $mshape,0,3D $mshkey,1 $vmesh,all alls !以上建模应该没太大问题 !以下是耦合,我在流固界面上的网格是重合节点,特别是下面这两段落我很不确定该怎么设定,感觉问题就出在这边了!这里解决了应该就可以。要怎么改?或是用CP? 或是NUMMRG? 重点是流体和固体要一起动,通常设定不好就流体自己动,或是流体都跑到壳体外面去了,流体跟壳不应该穿越,而是一起有行为。 csys,1 !将工作平面定义为柱坐标。 nsel,s,loc,x,10 nrotate,all !旋转节点坐标系。 CPINTF,UX,0.0001, !将径向约束(即X方向)加到节点上。 nsel,s,loc,z,0 nrotate,all CPINTF,UZ,0.0001, !边界条件,将底部固定,并给予Z方向加速度。 NSEL,S,LOC,Z,0 $D,ALL,ALL $acel,,,9.8 fini /solu antype,modal modopt,reduc,10,, mxpand,10, csys,1 !Z上柱坐标系 !定义主自由度,由图显示感觉是没问题,但我也不太确定。 Esel,s,type,,1 !选择壳 Nsle,s,all !所有点 Nsel,u,loc,z,0 !排除边界条件 m,all,ux !(径向)x方向的主自由度 Esel,s,type,,2 !选择液体 Nsel,s,loc,z,10 !再选择液面表面 m,all,uz !(竖向)z方向的主自由度 alls solve fini 水坝空库 /BATCH KEYW,PR_SET,1 KEYW,PR_STRUC,1 KEYW,PR_THERM,0 KEYW,PR_FLUID,0 KEYW,PR_ELMAG,0 KEYW,MAGNOD,0 KEYW,MAGEDG,0 KEYW,MAGHFE,0 KEYW,MAGELC,0 KEYW,PR_MULTI,0 KEYW,PR_CFD,0 /GO !* /prep7 !* define material proterties mp,dens,1,2650. !mat 1 for dam mp,ex,1,3.15e10 mp,prxy,1,.167 !* define element type et,1,PLANE42,,,2 !* define geometry lwater=618. k, 1,0.0,0.0,0.0 k, 2,70.2,0.,0. k, 3,0.,66.5,0. k, 4,21.9875,66.5,0. k, 5,0.,103.,0. k, 6,14.8,103.,0. a, 1, 2, 4, 3 a, 3, 4, 6, 5 asel,s,loc,x,0.,100. aatt,1,,1 cm,adam,area allsel,all !* mesh geometry ESIZE,0,10 lsel,s,loc,y,0.1,66. !坝下部剖分分数 lesize,all,,,15 mshape,0,2D mshkey,1 allsel,all amesh,all finish /solu antype,modal MODOPT,LANB,30 MXPAND,30, , ,0 esel,s,mat,,1 !坝体约束 nsle,s nsel,r,loc,y,-1.0,1.0 d,all,ux,0. d,all,uy,0. /pbc,all,,1 /pnum,type,1 /number,1 gplot allsel,all save solve 满库 /BATCH KEYW,PR_SET,1 KEYW,PR_STRUC,1 KEYW,PR_THERM,0 KEYW,PR_FLUID,0 KEYW,PR_ELMAG,0 KEYW,MAGNOD,0 KEYW,MAGEDG,0 KEYW,MAGHFE,0 KEYW,MAGELC,0 KEYW,PR_MULTI,0 KEYW,PR_CFD,0 /GO !* /prep7 !* define material proterties mp,dens,1,2650. !mat 1 for dam mp,ex,1,3.15e10 mp,prxy,1,.167 mp,dens,2,1000. !mat 2 for water mp,sonc,2,1440 !* define element type et,1,PLANE42,,,2 et,2,29 et,3,29,,1 !* define geometry lwater=618. k, 1,0.0,0.0,0.0 k, 2,70.2,0.,0. k, 3,0.,66.5,0. k, 4,21.9875,66.5,0. k, 5,0.,103.,0. k, 6,14.8,103.,0. k, 7,-1.*lwater,103.,0. k, 8,-1.*lwater,66.5,0. k, 9,-1.*lwater,0.,0. a, 1, 2, 4, 3 a, 3, 4, 6, 5 a, 8, 3, 5, 7 a, 9,1, 3, 8 asel,s,loc,x,0.,100. aatt,1,,1 cm,adam,area asel,s,loc,x,-1*lwater,0. aatt,2,,3 cm,awater,area allsel,all !* mesh geometry ESIZE,0,10 lsel,s,loc,y,0.1,66. !坝下部剖分分数 lesize,all,,,15 lsel,s,loc,x,-0.1,-1*lwater-1. !水体长度方向剖分分数 lsel,r,loc,y,-0.1,67. lesize,all,,,40,0.5 lsel,s,loc,x,-0.1,-1*lwater-1. !水体长度方向剖分分数 lsel,r,loc,y,100.,104. lesize,all,,,40,2.0 mshape,0,2D mshkey,1 allsel,all amesh,all !更改与水体接触的单元类型 esel,s,type,,3 nsle,s nsel,r,loc,x,-1.,1. esln,r emodif,all,type,2 allsel,all finish /solu antype,modal MODOPT,UNSYM,30 MXPAND,30, , ,0 /pnum,type,1 /number,1 nsel,s,loc,x,-1.,1. !库水坝体FSI面 esln,s esel,r,mat,,2 sf,all,fsi esel,s,mat,,1 !坝体约束 nsle,s nsel,r,loc,y,-1.0,1.0 d,all,ux,0. d,all,uy,0. esel,s,mat,,2 !水体表面约束 nsle,s nsel,r,loc,y,102.,104. d,all,pres,0. /pbc,all,,1 /psf,fsi,,2 allsel,all gplot save solve |
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