ANSYS关于疲劳计算的问题

1、现在用ANSYS做一个平台的管节点疲劳计算程序如下(前面的大部分略去)*dim,mk,array,1,5,*set,mk(1,1,1),2000000*set,mk(1,2,1),1000000*set,mk(1,3,1),800000*set,mk(1,4,1),1480000*set,mk(1,5,1),11380000/PREP7ET,1,BEAM188ET,2,PIPE59ET,3,PIPE16ET,4,COMBIN14MPTEMP,MPTEMP,1,0MPDATA,EX,1,2.1E11MPDATA,PRXY,1,0.3MPDATA,DENS,1,7850SECTYPE,1,BEAM

2、,CTUBE,b1,0SECOFFSET,CENTSECDATA,2.03,2.075,0,0,0,0,0,0,0,0SECTYPE,2,BEAM,CTUBE,b2,0SECOFFSET,CENTSECDATA,1.005,1.05,0,0,0,0,0,0,0,0SECTYPE,3,TAPER,SECDATA,1,(8*3*0.5)/3,0,8.5,SECDATA,2,(8*3*0.5)/3,0,85,R,1,R,2,2.572,0.1,R,3,2.5,0.028,R,4,1,0.02,0,0,0,0,R,5,1.5,0.025,0,0,0,0,R,6,2.0,0.025,0,0,0,0,R,

3、7,4.15,0.045,0,0,0,0,k,1,(8*3*0.5)/3,0,8.5,k,2,(8*3*0.5)/3,0,85,k,3,(8*3*0.5)/3,0,-6,k,4,0,8,-55,k,5,0,8,-7,k,6,0,8,-6,k,7,0,8,-5,k,8,0,8,-3,k,9,0,8,2.2,k,10,8*3*0.5,0,-55,k,11,8*3*0.5,0,-7,k,12,8*3*0.5,0,-6,k,13,8*3*0.5,0,-5,k,14,8*3*0.5,0,-3,k,15,8*3*0.5,0,2.2,k,16,0,-8,-55,k,17,0,-8,-7,k,18,0,-8,

4、-6,k,19,0,-8,-5,k,20,0,-8,-3,k,21,0,-8,2.2,k,22,(8*3*0.5)/3,0,-3,k,23,(8*3*0.5)/3,0,2.2,/solusolvefinish/post1fp,1,100,200,500,1000,1500,2000fp,7,10000,100000,1000000,2000000,3000000,5000000fp,13,6000000,7000000,8000000,9000000,10000000,11000000fp,19,12000000,15000000fp,21,150,120,110,100,95,90fp,27

5、,85,80,75,70,65,60fp,33,55,50,45,40,35,30fp,39,29,25save*set,n_num,node(4.6188,0,2.2)fl,1,n_numfsnode,n_num,1,1!取出指定应力位置的应力值fs,n_num,1,2,1,0,0,0,0,0,0fe,1,10000,2ftcalc,1当运行到fsnode,n_num,1,1!取出指定应力位置的应力值这一步的时候总是出现错误说该点的应力不可以获得,请教各位指导迷津!如果王老师看见帖子希望帮忙分析下ftcalc,1!进行疲劳寿命使用系数的计算ansys计算疲劳功能是不太行的,ansys中的疲劳

6、计算，只能针对某一个节点计算，如果要想得到关于疲劳失效的应力-应变图就不行了。你应该安装ansys的疲劳模块用疲劳模块对管节点进行疲劳分析,ANSYS的疲劳模块功能是很强大的.ANSYS疲劳模块安装后在ANSYS中调用就可以方便的使用了,如下图UTSYSMainMenuElLoadCaser*-wFilerL：=unFiletoexporttoANALTYFFLESUTYPofresiiltFE-FatiguebuttonsbuttonsTypeofan：dlyEiencodefnlFE-Fatiguefli中的模块和菜单_WCODEOUTEKportd：ELt：ELtoafileSHELLJCFFLUCEDRResilltlocat