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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/PREP7 ET,1,BEAM188ET,2,PIPE59ET,3,PIPE16ET,4,COMBIN14MPTEMP,,,,,,,,MPTEMP,1,0 MPDATA,EX,1,,2.1E11MPDATA,PRXY,1,,0
2、.3 MPDATA,DENS,1,,7850SECTYPE, 1,BEAM,CTUBE,b1,0SECOFFSET,CENTSECDATA,2.03,2.075,0,0,0,0,0,0,0,0 SECTYPE, 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,
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,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,
4、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,-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,7,10000,100000,1000000,20000
5、00,3000000,5000000fp,13,6000000,7000000,8000000,9000000,10000000,11000000fp,19,12000000,15000000fp,21,150,120,110,100,95,90fp,27,85,80,75,70,65,60fp,33,55,50,45,40,35,30fp,39,29,25save*set,n_num,node(4.6188,0,2.2) fl,1,n_num fsnode,n_num,1,1 !取出指定应力位置的应力值fs,n_num,1,2,1,
6、0,0,0,0,0,0 fe,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ANS
7、YS中调用就可以方便的使用了,如下图
