注:带有一定厚度的平面应力问题,采用 ANSYS14.5 单元,单元是 PLANE182 (a)整体模型 (b)1/4 模型 方形板受力图网格划分图: 荷载条件: LIST NODAL FORCES SELECTEDNODES CURRENTLYSELECTED NODAL LOAD SET= FX FY FZ MX MY MZ NODE LABEL REAL IMAG FY-1000.00000 0.00000000 LIST SURFACE LOADS ALLSELECTED LINES LINE LOAD LABEL VALI VALJ VAL2I VAL2J PRES1000. 1000. X方向应力图: Y方向应力图: Mises 等效应力图: 命令流: /BATCH /COM,ANSYS RELEASE 14.5 UP20120918 10:48:48 03/25/2016 /input,menust,tmp,'' /GRA,POWER /GST,ON /PLO,INFO,3 /GRO,CURL,ON /CPLANE,1 /REPLOT,RESIZE WPSTYLE,,,,,,,,0 /NOPRKEYW,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 /COM,/COM,Preferences GUIfiltering have been set display:/COM, Structural KEYOPT,1,1,0KEYOPT,1,3,3 KEYOPT,1,6,0 KEYOPT,1,1,0KEYOPT,1,3,3 KEYOPT,1,6,0 /EXIT,NOSAV/BATCH /COM,ANSYS RELEASE 14.5 UP20120918 10:58:51 03/25/2016 /input,menust,tmp,'' /GRA,POWER /GST,ON /PLO,INFO,3 /GRO,CURL,ON /CPLANE,1 /REPLOT,RESIZE WPSTYLE,,,,,,,,0 /NOPRKEYW,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 /COM,/COM,Preferences GUIfiltering have been set display:/COM, Structural KEYOPT,1,1,0KEYOPT,1,3,3 KEYOPT,1,6,0 MPTEMP,,,,,,,,MPTEMP,1,0 MPDATA,EX,1,,1e6 MPDATA,PRXY,1,,0 FLST,2,3,4FITEM,2,1 FITEM,2,3 FITEM,2,2 AL,P51X FLST,2,3,4 FITEM,2,4 FITEM,2,6 FITEM,2,5 AL,P51X FLST,2,3,4 FITEM,2,7 FITEM,2,2 FITEM,2,6 AL,P51X FLST,2,3,4 FITEM,2,8 FITEM,2,9 FITEM,2,7 AL,P51X FLST,5,9,4,ORDE,2 FITEM,5,1 FITEM,5,-9 CM,_Y,LINE LSEL, ,P51XCM,_Y1,LINE CMSEL,,_Y MSHAPE,0,2DMSHKEY,0 FLST,5,4,5,ORDE,2FITEM,5,1 FITEM,5,-4 CM,_Y,AREA ASEL, ,P51XCM,_Y1,AREA CHKMSH,'AREA' CMSEL,S,_Y CMDELE,_YCMDELE,_Y1 CMDELE,_Y2 FINISH/SOL FLST,2,2,4,ORDE,2 FITEM,2,5 FITEM,2,8 /GODL,P51X, ,UY, FLST,2,2,4,ORDE,2 FITEM,2,1 FITEM,2,4 /GODL,P51X, ,UX, FLST,2,1,3,ORDE,1 FITEM,2,1 /GOFK,P51X,FY,-1000 FLST,2,2,4,ORDE,2 FITEM,2,3 FITEM,2,9 /GO SFL,P51X,PRES,1000,/STATUS,SOLU SOLVE FINISH /POST1 /EFACET,1PLNSOL, 0,1.0/RGB,INDEX,100,100,100, /RGB,INDEX,80, 80, 80,13 /RGB,INDEX, 60, 60, 60,14 /RGB,INDEX, 0,15/REPLOT /EFACET,1PLNSOL, /EFACET,1PLNSOL, S,EQV, 0,1.0 GPLOT SAVE SAVE 三、混凝土坝体的有限元分析(30 所示的简化混凝土坝体,混凝土强度等级为C50,请根据混凝土规范可查询混 凝土的弹性模量、泊松比及密度。采用 ANSYS 有限元软件分析该混凝土坝体在水压 力作用下的应力分布。要求附模型网格划分图、最大主应力图、最小主应力图和整理 后的完整计算命令流。 注:平面应变模型采用 ANSYS14.5,单元是 PLANE182 网格划分图: 荷载条件 LIST SURFACE LOADS ALLSELECTED LINES LINE LOAD LABEL VALI VALJ VAL2I VAL2J PRES0.000 0.000 REFERENCE NUMBER SLOPECOORDINATE SYSTEM= SLOPEDIRECTION= COORDINATELOCATION WHERE SLOPE ZERO=20.0000000 SLOPE VALUE (LOAD PER UNIT LENGTH)= -9.80000000 第一主应力图: 第三主应力图: 命令流: /BATCH /COM,ANSYS RELEASE 14.5 UP20120918 23:38:42 03/24/2016 /NOPRKEYW,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 /COM,/COM,Preferences GUIfiltering have been set display:/COM, Structural KEYOPT,1,1,0KEYOPT,1,3,2 KEYOPT,1,6,0 MPTEMP,,,,,,,,MPTEMP,1,0 MPDATA,EX,1,,3.5e4 MPDATA,PRXY,1,,0.167 MPTEMP,,,,,,,, MPTEMP,1,0 MPDATA,DENS,1,,2450 K,2,10,20,0,K,3,15,20,0, K,4,15,0,0, /RGB,INDEX, /RGB,INDEX,60, 60, 60,13 /RGB,INDEX, 80, 80, 80,14 /RGB,INDEX,100,100,100,15 /REPLOT FLST,2,4,4FITEM,2,4 FITEM,2,1 FITEM,2,3 FITEM,2,2 AL,P51X FLST,5,2,4,ORDE,2 FITEM,5,1 FITEM,5,3 CM,_Y,LINE LSEL, ,P51XCM,_Y1,LINE CMSEL,,_Y FLST,5,1,4,ORDE,1FITEM,5,4 CM,_Y,LINE LSEL, ,P51XCM,_Y1,LINE CMSEL,,_Y FLST,5,1,4,ORDE,1FITEM,5,2 CM,_Y,LINE LSEL, ,P51XCM,_Y1,LINE CMSEL,,_Y MSHAPE,0,2DMSHKEY,0 CM,_Y,AREAASEL, CM,_Y1,AREACHKMSH,'AREA' CMSEL,S,_Y CMDELE,_YCMDELE,_Y1 CMDELE,_Y2 FINISH/SOL FLST,2,1,4,ORDE,1 FITEM,2,2 /GODL,P51X, ,ALL, SAVE SAVE ACEL,0,10,0, FLST,2,1,4,ORDE,1 FITEM,2,3 /GO SFGRAD,PRES, ,Y,2500,-3.92e-5, FLST,2,1,4,ORDE,1 FITEM,2,3 /GO SFL,P51X,PRES,0,50RESUME,'file4','db','.' /COM,ANSYS RELEASE 14.5 UP20120918 00:08:03 03/25/2016 GPLOT /DIST,1,0.924021086472,1 /REP,FAST /DIST,1,0.924021086472,1 /REP,FAST /DIST,1,0.924021086472,1 /REP,FAST /DIST,1,0.924021086472,1 /REP,FAST /DIST,1,1.08222638492,1 /REP,FAST /DIST,1,1.08222638492,1 /REP,FAST /DIST,1,0.924021086472,1 /REP,FAST SFGRAD,PRES, ,Y,2500,-3.92e-005, FLST,2,1,4,ORDE,1 FITEM,2,3 /GO SFL,P51X,PRES,0,1/DIST,1,1.08222638492,1 /REP,FAST /STATUS,SOLU SOLVE FINISH /POST1 /EFACET,1PLNSOL, 0,1.0/RGB,INDEX,100,100,100, /RGB,INDEX,80, 80, 80,13 /RGB,INDEX, 60, 60, 60,14 /RGB,INDEX, 0,15/REPLOT /DIST,1,1.08222638492,1 /REP,FAST /DIST,1,1.08222638492,1 /REP,FAST /DIST,1,0.924021086472,1 /REP,FAST /DIST,1,1.08222638492,1 /REP,FAST /EFACET,1PLNSOL, 0,1.0GPLOT 四、叙述工程数值计算的意义和作用(10 我们学的ANSYS软件就是一款强大的有限元软件,ANSYS 具有强大的实体建模技术。 与现在流行的大多数CAD 软件类似。通过自顶向下或自底向上两种方式,以及布尔运 算、坐标变换、曲线构造、蒙皮技术、拖拉、旋转、拷贝、镜射、倒角等多种手段, 可以建立起真实地反映工程结构的复杂几何模型。