ANSYS多物理耦合场有限元讲诉.ppt

结构分析中的有限单元法 /BATCH,list /Title,Water flow around a slender aluminum beam. !! !!!!!0. Define parameter values !! fact=1.0e-3! Length conversion factor length=.75*fact! Beam length d0=.005*fact! Beam thickness d1=.04*fact! Transverse size of bottom fluid channel d2=.02*fact! Transverse size of top fluid channel dcen=d1+0.5*d0! Center location of the beam 结构分析中的有限单元法 widt=d0+d1+d2! Whole width of the model dl=widt elsi=0.5*d0! Element size for meshing modx=70.0e9! Youngs modulus nust=0.3! Poisson ratio denw=1.0e3! Density of water visw=1.0e-3! Viscosity of water vin =8.85e-3! Inlet water velocity (meters/second) /PREP7 et,1,141! 2D Flotran element for fluid region et,2,141! Temporary element for beam region 结构分析中的有限单元法 rect,,length+dl,,widt rect,,length,d1,d1+d0 aovlap,all numcmp,area ASEL,S,loc,y,dcen ASEL,INVERT AATT,1,,1 type,1 ASEL,INVERT aatt,2,,2 type,2 alls 结构分析中的有限单元法 esize,elsi amesh,all alls fini /prep7 !!!!!2. Create Physics Environment for the Fluid et,1,141 et,2,0!　Assign null type element for the beam !!CFD Solution Control flda,solu,flow,1 flda,solu,turb,1 结构分析中的有限单元法 flda,advm,mome,supg flda,advm,turb,supg flda,iter,exec,100 flda,outp,sumf,10 !!CFD Property Information flda,prot,dens,constant flda,prot,visc,constant flda,nomi,dens,denw! 1000 kg/m3 for density - water flda,nomi,visc,visw! 4.6E-4 kg-s/m (viscosity of water) flda,conv,pres,1.E-9! Tighten pressure equation convergence !!CFD Boundary Conditions (Applied to Solid Model) lsel,s,loc,x,0 lsel,u,loc,y,dcen dl,all,,vy,0.,1 dl,all,,vx,vin,1! Inlet Condition 结构分析中的有限单元法 lsel,s,loc,y,0 lsel,a,loc,y,widt dl,all,,vx,0.,1! Outer Walls dl,all,,vy,0.,1 asel,s,type,,2 lsla,s dl,all,,vx,0.,1! Structure boundary conditions dl,all,,vy,0.,1 lsel,s,loc,x,length+dl dl,all,,pres,0.,1! Outlet pressure condition asel,s,type,,1 cm,area2,area! Fluid area component for morphing alls fini 结构分析中的有限单元法 /title,Fluid Analysis physics,write,fluid,fluid physics,clear /prep7 et,1,0 et,2,42! Structural element t