ANSYS动力学分析的几个入门例子
问题一:悬臂梁受重力作用发生大变形,求其固有频率。
基本过程:
1、建模
2、静力分析
3、求静力解
4、开始新的求解:modal
5、扩展模态解
6、察看结果
/PREP7
ET,1,BEAM189
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,210e9
MPDATA,PRXY,1,,0.3
MPDATA,DENS,1,,7850
SECTYPE,
SECOFFSET, CENT
SECDATA,0.005,0.01,0,0,0,0,0,0,0,0
K, ,,,,
K, ,2,,,
K, ,2,1,,
LSTR,
LATT,1, ,1, ,
LESIZE,1, , ,20, , , , ,1
LMESH,
FINISH
/SOL
ANTYPE,0
NLGEOM,1
PSTRES,ON
DK,1, , , ,0,ALL, , , , , ,
ACEL,0,9.8,0,
TIME,1
AUTOTS,1
NSUBST,20, , ,1
KBC,0
SOLVE
FINISH
/SOLUTION
ANTYPE,2
MSAVE,0
MODOPT,LANB,10
MXPAND,10, , ,0
PSTRES,1
MODOPT,LANB,10,0,0, ,OFF
UPCOORD,1,ON
PSOLVE,TRIANG
PSOLVE,EIGLANB
FINISH
/SOLU
EXPASS,1
PSOLVE,EIGEXP
FINISH
SET,LIST
FINISH
#p#分页标题#e#问题二:循环对称结构模态分析
这是ANSYS HELP里的例子,但那个命令流似乎有些问题,下面是整理过的命令流。
基本过程:
1、建模
2、define cyclic
3、定义约束
4、求模态解
5、展开并察看结果
r1=5
r2=10
d1=2
nsect=24
alpha_deg=360/nsect
alpha_rad=2*acos(-1)/nsect
/prep7
csys,1
k,1,0,0,0
k,2,0,0,d1
k,3,r1,0,0
k,4,r1,0,d1
l,3,4
arotat,1,,,,,,1,2,alpha_deg/2
k,7,r2,0,0
k,8,r2,0,d1
l,7,8
arotat,5,,,,,,1,2,alpha_deg/2
arotat,2,,,,,,1,2,alpha_deg/2
arotat,6,,,,,,1,2,alpha_deg/2
a,5,6,10,9
mshkey,1
et,1,181
r,1,0.20
r,2,0.1
mp,ex,1,10e6
mp,prxy,1,0.3
mp,dens,1,1e-4
esize,0.5
asel,,,,1,4
aatt,,1
asel,,,,5
aatt,,2
allsel
CYCLIC, , , ,'CYCLIC'
AMESH,all
FINISH
/SOL
ANTYPE,2
MODOPT,LANB,10
MXPAND,10, , ,0
PSTRES,0
MODOPT,LANB,10,0,0, ,OFF
DK,5, , , ,0,UZ, , , , , ,
SOLVE
FINISH
/POST1
SET,LIST
SET, , ,1, , , ,4,
/CYCEXPAND, ,ON
PLNS,U,SUM
FINISH
问题三:三角平台受谐波载荷作用,求结构响应
谐波载荷为作用在平台上面一点的集中力,幅值为10N,频率范围5Hz~70Hz
1、建模
2. 求模态解
3、用模态叠加法作谐分析
4. 观察结果
/PREP7
ET,1,BEAM189
ET,2,SHELL93
R,1,0.01, , , , , ,
MP,EX,1,210e9
MP,PRXY,1,0.3
MP,DENS,1,7850
SECTYPE,
SECOFFSET, CENT
SECDATA,0.005,0.008,0,0,0,0,0,0,0,0
K, ,-0.5,,,
K, ,0.5,,,
K, ,,,1,
K, ,,1,1,
K, ,-0.5,1,,
K, ,0.5,1,,
K, ,,,0.5,
A,4,5,6
LSTR,
LSTR,
LSTR,
LSEL,S,LINE,,4,6
LATT,1,1,1, ,
LSEL, , , ,ALL
LESIZE,ALL, , ,10, , , , ,1
LMESH,4,6
TYPE,
MSHAPE,0,2D
MSHKEY,1
AMESH,1
FINISH
/SOL
ANTYPE,2
MODOPT,LANB,20
MXPAND,20, , ,0
MODOPT,LANB,20,0,0, ,OFF
KSEL,S,KP,,1,3
DK,ALL, , , ,0,ALL, , , , , ,
SOLVE
FINISH
!/POST1
!SET,LIST
!FINISH
/SOL
ANTYPE,3
HROPT,MSUP
HROUT,ON
HROPT,MSUP,20, ,
HROUT,ON,OFF,0
F,177,FY,-10,
HARFRQ,5,70,
NSUBST,200,
KBC,1
ALPHAD,5,
SOLVE
FINISH
/POST26
FILE,,rfrq
NUMVAR,20
NSOL,2,139,U,Y,
PLVAR,2
FINISH
问题四:三角平台受一地震谱激励,求应力分布和支反力
基本过程:
1、建模
2、求模态解
3、求谱解
4、扩展模态
5、模态合并
6、观察结果
/PREP7
ET,1,BEAM189
ET,2,SHELL93
R,1,0.01, , , , , ,
MP,EX,1,210e9
MP,PRXY,1,0.3
MP,DENS,1,7850
SECTYPE,
SECOFFSET, CENT
SECDATA,0.005,0.008,0,0,0,0,0,0,0,0
K, ,-0.5,,,
K, ,0.5,,,
K, ,,,1,
K, ,,1,1,
K, ,-0.5,1,,
K, ,0.5,1,,
K, ,,,0.5,
A,4,5,6
LSTR,
LSTR,
LSTR,
LSEL,S,LINE,,4,6
LATT,1,1,1, ,
LSEL, , , ,ALL
LESIZE,ALL, , ,10, , , , ,1
LMESH,4,6
TYPE,
MSHAPE,0,2D
MSHKEY,1
AMESH,1
FINISH
/SOL
ANTYPE,2
MODOPT,LANB,10
KSEL,S,KP,,1,3
DK,ALL, , , ,0,ALL, , , , , ,
SOLVE
FINISH #p#分页标题#e#
/SOL
ANTYPE,8
SPOPT,SPRS,10,1
SVTYP,3
SED,0,1,0,
FREQ,0.25,1.34,6.73,14.6,28.9,0,0,0,0
SV,0,0.00073,0.00016,0.00034,0.00034,0.00052,
SOLVE
FINISH
/SOL
ANTYPE,2
EXPASS,1
MXPAND,10,0,0,1,0.001,
SOLVE
FINISH
/SOL
ANTYPE,8
SRSS,0.001,DISP
SOLVE
/POST1
SET,LIST
/INPUT,,mcom
PRRSOL,F
FINISH
问题五:三角平台受时程载荷作用,求应力分布和变形过程
基本过程:
1、建模
2. 施加随时间变化载荷,定义载荷步
3、求解
4. 在POST1和POST26中观察结果
/PREP7
ET,1,BEAM189
ET,2,SHELL93
R,1,0.01, , , , , ,
MP,EX,1,210e9
MP,PRXY,1,0.3
MP,DENS,1,7850
SECTYPE,
SECOFFSET, CENT
SECDATA,0.005,0.008,0,0,0,0,0,0,0,0
K, ,-0.5,,,
K, ,0.5,,,
K, ,,,1,
K, ,,1,1,
K, ,-0.5,1,,
K, ,0.5,1,,
K, ,,,0.5,
A,4,5,6
LSTR,
LSTR,
LSTR,
LSEL,S,LINE,,4,6
LATT,1,1,1, ,
LSEL, , , ,ALL
LESIZE,ALL, , ,10, , , , ,1
LMESH,4,6
TYPE,
MSHAPE,0,2D
MSHKEY,1
AMESH,1
FINISH
/SOL
ANTYPE,4
TRNOPT,FULL
KSEL,S,KP,,1,3
DK,ALL, , , ,0,ALL, , , , , ,
OUTRES,ALL,1
ALPHAD,5,
TIME,2
AUTOTS,1
NSUBST,50, , ,1
KBC,0
SFA,ALL,1,PRES,500
LSWRITE,1,
TIME,3
LSWRITE,2,
TIME,4
SFA,ALL,1,PRES,150
KBC,1
LSWRITE,3,
TIME,5
SFA,ALL,1,PRES,
LSWRITE,4,
LSSOLVE,1,4,1,
FINISH
/POST26
NSOL,2,177,U,Y,uyy
PLVAR,2
FINISH #p#分页标题#e#
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