请教各位大虾：ansys中使用优化分析具体是怎么操作的？

kdb00000

/BATCH

*SET,RN,0.0025  
*SET,RW,0.0075
*SET,RW1,0.005
*SET,RW2,0.0075
*SET,RW3,0.0075
*SET,RW4,0.0035
*SET,RW5,0.0075
*SET,H1,0.001
*SET,H2,0.001
*SET,H3,0.0015
*SET,H4,0.001
*SET,H5,0.0034
*SET,H6,0.001

/PREP7
ET,1,SOLID45
ET,2,SOLID5
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,DENS,1,,2800
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,EX,1,,7.1E10
MPDATA,PRXY,1,,0.33
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,DENS,2,,8450
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,EX,2,,1.08E11
MPDATA,PRXY,2,,0.33
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,DENS,3,,7500
TB,ANEL,3,1,21,0
TBTEMP,0
TBDATA,,1.39E11,7.78E10,7.43E10,,,  
TBDATA,,1.39E11,7.43E10,,,,1.15E11  
TBDATA,,,,,2.56E10,,
TBDATA,,3.06E10,,3.06E10,,,
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,PERX,3,,8.107E-009   
MPDATA,PERY,3,,8.107E-009   
MPDATA,PERZ,3,,7.436E-009   
TB,PIEZ,3,,,0   
TBMODIF,1,1,
TBMODIF,1,2,
TBMODIF,1,3,-5.4
TBMODIF,2,1,
TBMODIF,2,2,
TBMODIF,2,3,-5.4
TBMODIF,3,1,
TBMODIF,3,2,
TBMODIF,3,3,15.8
TBMODIF,4,1,
TBMODIF,4,2,
TBMODIF,4,3,
TBMODIF,5,1,
TBMODIF,5,2,12.3
TBMODIF,5,3,
TBMODIF,6,1,12.3
TBMODIF,6,2,
TBMODIF,6,3,

CYLIND,RW1,RN,0,H1,0,360,
CYLIND,RW2,RN,H1,H1+H2,0,360,
CYLIND,RW,RN,H1+H2,H1+H2+H3,0,360,
CYLIND,RW,RN,H1+H2+H3,H1+H2+2*H3,0,360,
CYLIND,RW3,RN,H1+H2+2*H3,H1+H2+2*H3+H4,0,360,
CYLIND,RW4,RN,H1+H2+2*H3+H4,H1+H2+2*H3+H4+H5,0,360,
CYLIND,RW5,RN,H1+H2+2*H3+H4+H5,H1+H2+2*H3+H4+H5+H6,0,360,  

FLST,2,3,6,ORDE,2   
FITEM,2,5   
FITEM,2,-7  
VADD,P51X   
FLST,2,2,6,ORDE,2   
FITEM,2,1   
FITEM,2,-2  
VADD,P51X   
FLST,2,4,6,ORDE,3   
FITEM,2,3   
FITEM,2,-5  
FITEM,2,8   
VGLUE,P51X  
CM,_Y,VOLU  
VSEL, , , ,       6
CM,_Y1,VOLU
CMSEL,S,_Y  
CMSEL,S,_Y1
VATT,       1, ,   1,       0   
CMSEL,S,_Y  
CMDELE,_Y   
CMDELE,_Y1  
CM,_Y,VOLU  
VSEL, , , ,       2
CM,_Y1,VOLU
CMSEL,S,_Y  
CMSEL,S,_Y1
VATT,       2, ,   1,       0   
CMSEL,S,_Y  
CMDELE,_Y   
CMDELE,_Y1  
FLST,5,2,6,ORDE,2   
FITEM,5,1   
FITEM,5,3   
CM,_Y,VOLU  
VSEL, , , ,P51X
CM,_Y1,VOLU
CMSEL,S,_Y  
CMSEL,S,_Y1
VATT,       3, ,   2,       0   
CMSEL,S,_Y  
CMDELE,_Y   
CMDELE,_Y1  
ESIZE,0.0005,0,
FLST,5,2,6,ORDE,2   
FITEM,5,1   
FITEM,5,3   
CM,_Y,VOLU  
VSEL, , , ,P51X
CM,_Y1,VOLU
CHKMSH,'VOLU'   
CMSEL,S,_Y  
VSWEEP,_Y1  
CMDELE,_Y   
CMDELE,_Y1  
CMDELE,_Y2  
MSHAPE,1,3D
MSHKEY,0
FLST,5,2,6,ORDE,2   
FITEM,5,2   
FITEM,5,6   
CM,_Y,VOLU  
VSEL, , , ,P51X
CM,_Y1,VOLU
CHKMSH,'VOLU'   
CMSEL,S,_Y  
VMESH,_Y1   
CMDELE,_Y   
CMDELE,_Y1  
CMDELE,_Y2  
FINISH  
/SOL
ANTYPE,2
MSAVE,0
MODOPT,LANB,8   
EQSLV,SPAR  
MXPAND,8, , ,0  
LUMPM,0
PSTRES,0
MODOPT,LANB,8,20000,50000, ,OFF
SOLVE   

这是一种结构的模态分析，现在我想通过改变尺寸来优化其结构，以便能提取出来频率相同的两个不同振型．如何使用ＡＰＤＬ进行优化设计，请高手们给点指点，呵呵，谢谢了！