发布时间 : 星期五 文章銆愯揪灏旀暣鐞嗐�慉NSYS娴佸浐鑰﹀悎鍒嗘瀽瀹炰緥鍛戒护娴?- 鐧惧害鏂囧簱更新完毕开始阅读73ce1d9579563c1ec4da7110
ANSYS流固耦合分析实例命令流
$
*PART
Part 2 for Mat 2 and Elem Type 1 2 2 2 0 0 0 0 $
*PART
Part 3 for Mat 3 and Elem Type 1 3 2 3 0 0 0 0 *PART
Part 3 for Mat 3 and Elem Type 1 4 2 4 0 0 0 0 $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$ RIGID BOUNDRIES $
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $
*CONTACT_SURFACE_TO_SURFACE 1 2 3 3 0 0 0 0
0.0000 0.0000 0.0000 0.0000 0.0000 0 0.00000.1000E+08 1.0000 0.0001 0.0000 0.0000 1.0000 1.0000 1.0000 1.0000 *CONTACT_SURFACE_TO_SURFACE 1 3 3 3 0 0 0 0
0.0000 0.0000 0.0000 0.0000 0.0000 0 0.00000.1000E+08 1.0000 0.0001 0.0000 0.0000 1.0000 1.0000 1.0000 1.0000 *CONTACT_SURFACE_TO_SURFACE 1 4 3 3 0 0 0 0
0.0000 0.0000 0.0000 0.0000 0.0000 0 0.00000.1000E+08 1.0000 0.0001 0.0000 0.0000 1.0000 1.0000 1.0000 1.0000 $
*DEFINE_CURVE
1 0 1.000 1.000 0.000 0.000
0.000000000000E+00 1.000000000000E-04 1.000000000000E+05 1.000000000000E-04
*BOUNDARY_PRESCRIBED_MOTION_RIGID 3 2 0 1 -1.00 0 0.000 5.00e3
*BOUNDARY_PRESCRIBED_MOTION_RIGID 4 2 0 1 -1.00 0 5.00e3 0.000 $
通常我们处理液面晃动采用上述方法，LS-DYNA求解器在下一个版本LS970中在MESHFREE功能上增加了更为稳定和高效的EFG
技术，在解决此类问题上将给予我们更大的灵活性和更多的选择。
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ANSYS流固耦合分析实例命令流
我是通过设置流体单元的关键字还实现接触与非接触的，边界条件的话，我是用的底部固结，当然也可以在地脚锚栓处固结。这个差别都不是很大的
有人说ansys公司技术人员建议对流固耦合模态分析使用fluid80单元，然后看了以下ansys帮助中说 The fluid80 element is particularly well suited for calculating hydrostatic pressures and fluid/solid interactions
脱硫塔于浆液耦合的分析
上次做的脱硫塔于浆液耦合的分析中间有事就一直停下来没做，前两天又拾起来接着做。现在遇到了一些问题，我也查不出是什么原因造成的：就是我在用sf家族命令标记耦合界面时，出现了这样的错误
*** ERROR *** CP= 29.297 TIME= 22:15:44 Number of FLUID/SOLID interfaces do not match for FSIN boundary condition.
*** ERROR *** CP= 29.641 TIME= 22:15:48 Error during fsi setup - Skipping the remaining FSI analysis. 下面是我标记耦合界面的命令流： !对塔体底部加约束 lsel,s,,,54,63 nsll,s,1 d,all,all !求解
!*** FSI interfaces !!fluid side
asel,s,,,16,37,3 allsel,below,area nsla,s,1 sf,all,fsi,1
!structural side
asel,s,,,39,78 allsel,below,area nsla,s,1 sf,all,fsin,1
allsel /solu
fldata,solu,flow,1
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ANSYS流固耦合分析实例命令流
fldata,solu,ale,1 fldata,solu,turb,1 fldata,solu,tran,1 fldata,iter,exec,50 !Fluid Properties
fldata7,prot,dens,constant fldata7,prot,visc,constant
fldata8,nomi,dens,1000. ! 1000 kg/m3 for density - water fldata8,nomi,visc,4.6E-4 ! 4.6E-4 kg-s/m (viscosity of water) fldata8,conv,pres,1.E-8 ! Tighten pressure equation convergence
fsan,on !FSI analysis on
fsco,all,1.0e-1 !FSI convergence criteria fsre,all,0.5 !FSI relaxation
fsou,1 !FSI output frequency fsit,5 !Number of stagger loops fsti,0.05 !FSI end time fsdt,0.01 !FSI delta time
fsor,fluid !FSI order of solution
fstr,solid, !Transient fluid for FSI analysis fstr,fluid, !Transient structural for FSI analysis deltim,0.01
fldata,time,step,0.01 save
流固耦合瞬态分析的例子
/batch a=1.0 b=1.0
gap=0.8*a/2 !gap=0.4 thick=0.01*a !thick=0.01 c=0.5*a !c=0.5
/PREP7
smrt,off !! 关闭智能化网格功能 et,1,142 !142 三维流体单元 et,2,45 et,3,141 et,4,42
keyopt,1,4,1 keyopt,3,4,1 msha,0
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ANSYS流固耦合分析实例命令流
mshk,1
rect,0,gap,0,b/2-thick
rect,0,gap,b/2-thick,b/2+thick rect,0,gap,b/2+thick,b rect,gap,a/2,0,b/2-thick
rect,gap,a/2,b/2-thick,b/2+thick rect,gap,a/2,b/2+thick,b nummrg,kp numcmp,all
nx1=16-4
lesi,1,,,nx1,-1,1 lesi,3,,,nx1,-1,1 lesi,6,,,nx1,-1,1 lesi,9,,,nx1,-1,1
nx2=6-2
lesi,11,,,nx2,1,1 lesi,13,,,nx2,1/1,1 lesi,15,,,nx2,1/1,1 lesi,17,,,nx2,1/1,1
ny1=2
lesi,7,,,ny1,1,1 lesi,5,,,ny1,1,1 lesi,14,,,ny1,1,1
ny2=20-4
lesi,4,,,ny2,-2,1 lesi,2,,,ny2,-2,1 lesi,12,,,ny2,-2,1 lesi,10,,,ny2,-2,1 lesi,8,,,ny2,-2,1 lesi,16,,,ny2,-2,1
asel,s,,,2 aatt,,,4 asel,inve aatt,,,3 alls
amesh,all agen,2,2 aclear,2 adel,2,,,1
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