流固耦合模态分析提取不了振型

yingyouwei

/PREP7
ET,1,PLANE82
KEYOPT,1,3,1
MP,DENS,1,6600
MP,EX,1,1.30e+11
MP,PRXY,1,0.24
ET,2,PLANE82
KEYOPT,2,3,1
MP,DENS,2,7800
MP,EX,2,2.10e+11
MP,PRXY,2,0.27
ET,3,FLUID29
KEYOPT,3,2,0 !特别注意
MP,DENS,3,850
MP,SONC,3,1380
MP,MU,3,0.27

K,1,0.020,0,0
K,2,0,0,0
K,3,0,0.160,0
K,4,0.085,0.160,0
K,5,0.085,0.120,0
K,6,1.315,0.120,0
K,7,1.315,0.160,0
K,8,1.400,0.160,0
K,9,1.400,0.106,0
K,10,1.465,0.106,0
K,11,1.465,0.070,0

K,12,1.380,0.070,0
K,13,1.380,0.100,0
K,14,0.020,0.100,0
K,15,0.070,0.100,0
K,16,1.670,0,0
K,17,1.670,0.070,0
K,18,0.070,0.070,0
LSTR,1,2
LSTR,2,3
LSTR,3,4
LSTR,4,5
LSTR,5,6
LSTR,6,7
LSTR,7,8
LSTR,8,9
LSTR,9,10
LSTR,10,11
LSTR,11,12
LSTR,12,13
LSTR,13,14
LSTR,14,1
AL,ALL
LSTR,15,14
LSTR,14,1
LSTR,1,16
LSTR,16,17
LSTR,17,18
LSTR,18,15
LSTR,13,15
LSTR,18,12
AL,14,15,19,17,18,16
AL,19,20,21,12
AATT,1,,1 !指定材料
TYPE,1
EXTOPT,ESIZE,20,0,
AATT,2,,2
TYPE,2
AATT,3,,3
TYPE,3
ESIZE,0.005
AMESH,ALL !自由网格划分
EPLOT
FINISH

!设置接触特性

/solu
antype,2
modopt,unsym,10 !非对称模态提取方法处理流固耦合问题
eqslv,front
mxpand,10,,,1
DL,2,1,UX
DL,8,1,UX
NSEL,S,LOC,Y,0
D,ALL,UY,0
ALLSEL

sfl,19,,fsi !定义流固耦合界面
sfl,21,,fsi !定义流固耦合界面
sfl,20,,fsi !定义流固耦合界面
sfl,12,,fsi
SOLVE
SAVE
FINISH

出现错误提示：

Scaling factor undefined-perform PLDISP to establish default value

请各位高手请教！谢谢！