下面的命令流进行静力分析，求解时既不出现solution is done也不出现错误，原因是什么？

finish

/clear,all

/PREP7  

 

ET,1,PIPE288

SECTYPE,1,PIPE, ,   

SECDATA,32,1.8,0,0,1,0,0,0, 

SECOFFSET,0,0,  

SECCONTROL,0,   

MP,EX,1,2.1e11 

MP,PRXY,1,0.3  

K,1,-4000,0,0,  

K,2,-3736,1500,0, 

K,3,-3449,1800,0,   

K,4,-3225.6,1999,0, 

!K,5,-1919,2850,0,   

K,6,-2036,2797.6,0, 

K,7,-1253.4,3125.7,0,   

K,8,0,3400,0,      

K,9,1253.4,3125.7,0,   

!K,10,1919,2850,0,   

K,11,2036,2797.6,0, 

K,12,3225.6,1999,0, 

K,13,3449,1800,0,   

K,14,3736,1500,0,   

K,15,4000,0,0,   

K,17,0,1999,0,

LSTR,1,2  

LSTR,14,15   

LARC,2,8,6 

LARC,14,8,11 

LSEL,S,,,1,4,1

LATT,1, ,1, , , ,1  

LESIZE,ALL, , ,30, ,1, , ,1,

lmesh,1,4,1 

ET,2,LINK180

MP,EX,2,2.1e11 

MP,PRXY,2,0.3

SECTYPE,2, BEAM, CTUBE, , 0  

SECOFFSET, CENT 

SECDATA,30.5,32,0,0,0,0,0,0,0,0,0,0   

  

R,2,294.524, ,0

n,122,-3225.6,1999.0,0.0000

n,124,-3010.6,1999.0,0.0000

n,125,-2795.5,1999.0,0.0000

n,126,-2580.5,1999.0,0.0000

n,127,-2365.4,1999.0,0.0000

n,128,-2150.4,1999.0,0.0000

n,129,-1935.4,1999.0,0.0000

n,130,-1720.3,1999.0,0.0000

n,131,-1505.3,1999.0,0.0000

n,132,-1290.2,1999.0,0.0000

n,133,-1075.2,1999.0,0.0000

n,134,-860.16,1999.0,0.0000

n,135,-645.12,1999.0,0.0000

n,136,-430.08,1999.0,0.0000

n,137,-215.04,1999.0,0.0000

n,123,3225.6,1999.0,0.0000

n,138,-0.22737E-12,1999.0,0.0000

n,139,215.04,1999.0,0.0000

n,140,430.08,1999.0,0.0000

n,141,645.12,1999.0,0.0000

n,142,860.16,1999.0,0.0000

n,143,1075.2,1999.0,0.0000

n,144,1290.2,1999.0,0.0000

n,145,1505.3,1999.0,0.0000

n,146,1720.3,1999.0,0.0000

n,147,1935.4,1999.0,0.0000

n,148,2150.4,1999.0,0.0000

n,149,2365.4,1999.0,0.0000

n,150,2580.5,1999.0,0.0000

n,151,2795.5,1999.0,0.0000

n,152,3010.6,1999.0,0.0000

n,153,-1253.4,3125.7,0.0000

n,154,0.0000,1999.0,0.0000

n,156,-1169.8,3050.6,0.0000

n,157,-1086.3,2975.5,0.0000

n,158,-1002.7,2900.4,0.0000

n,159,-919.16,2825.2,0.0000

n,160,-835.60,2750.1,0.0000

n,161,-752.04,2675.0,0.0000

n,162,-668.48,2599.9,0.0000

n,163,-584.92,2524.8,0.0000

n,164,-501.36,2449.7,0.0000

n,165,-417.80,2374.6,0.0000

n,166,-334.24,2299.5,0.0000

n,167,-250.68,2224.3,0.0000

n,168,-167.12,2149.2,0.0000

n,169,-83.560,2074.1,0.0000

n,184,1253.4,3125.7,0.0000

n,186,1169.8,3050.6,0.0000

n,187,1086.3,2975.5,0.0000

n,188,1002.7,2900.4,0.0000

n,189,919.16,2825.2,0.0000

n,190,835.60,2750.1,0.0000

n,191,752.04,2675.0,0.0000

n,192,668.48,2599.9,0.0000

n,193,584.92,2524.8,0.0000

n,194,501.36,2449.7,0.0000

n,195,417.80,2374.6,0.0000

n,196,334.24,2299.5,0.0000

n,197,250.68,2224.3,0.0000

n,198,167.12,2149.2,0.0000

n,199,83.560,2074.1,0.0000

TYPE,2   

MAT,2

SECNUM,2

REAL,2

e,122,124

*do,i,0,27,1

e,124+i,125+i

*enddo

e,152,123

e,153,156

*do,i,0,12,1

e,156+i,157+i

*enddo

e,169,138

e,184,186

*do,i,0,12,1

e,186+i,187+i

*enddo

e,199,138

allsel,all

FINISH  

/SOL

D,1, , , ,0,UX,UY,uz, , , , 

D,33, , , ,0,UX,UY,uz, , , ,  

 

F,66,FY,-130

F,95,FY,-130

F,79,FY,-170

F,108,FY,-170

F,63,FY,-190

ALLSEL,ALL  

/STATUS,SOLU

NLGEOM,1

SOLVE   

FINISH