第10章动力学分析介绍.pdf

10

10.1

()()

ANSYS6.1

10.2

10.2.1

10.2.1.1 ()

ANSYSANSYS6.1 ()

10.2.1.2

[ ] { } [ ] { }iii MK = 2

[ ]K { }i i() i I( ) 2i

[ ]M ANSYS6.1 7 z Block Lanczos () (Block Lanczos) LanczosLanczos Lanczos

(Block Lanczos) z Subspace () Subspace Jacobi z Powerdynamics PowerDynamics100,000Subspace Block Lanczos

LUMPM,ON PowerDynamicsMODOPT,SUBSPACE EQSLV,PCG z Reduced () Reduced Subspace z Unsymmetric () Unsymmetric z Damped () Damped z QR Damped (QR) QR Damped (QR) QR

Subspace Reduced Block Lanczos PowerDynamicsUnsymmetric DampedANSYS ANSYS/Linear Plus Unsymmetric

Damped

10.2.2

10.2.2.1 ()()() ( 10.1)

(a) (b)

10.1 ()

10.2.2.2 ANSYS6.1Full ()Reduced ()Mode

Superposn () 1

() z z z z

()()

Frontal JCG ICCG

2 DOF z Frontal z

z

() z ()

z ()

3 () z Reduced z LVSCALE z z z () z z PowerDynamics

10.2.3

10.2.3.1 ()

10.2.3.2 ANSYS6.1Full ()Reduced () Mode

Superposn () 10.2.2.2

10.2.4

10.2.4.2 ()

10.2.4.2 ANSYS6.1

1 z Single-point Response Spectrum,SPRS () () 10.2(a) z Multi-point Response Spectrum,MPRS ()

10.2(b)

10.2

2 Dynamic Design Analysis MethodDDAM () (NRL-1396)

3 Power Spectral DensityPSD (,)

10.2.4.3 1 (PF)()

2

3

10.3

10.3.1

1 2 3 4

10.3.1.1 z

z

EX()DENS()

10.3.1.2 1 ANSYS /SOLU GUIMain Menu | Solution 2

1 (ANTYPE) Restart

ANTYPE GUIMain Menu | Solution | Analysis Type | New Analysis

2 GUIMain Menu | Solution | Analysis Type | Analysis Options

(Modal Analysis)( 10.3)

10.3 z Modal Extraction Method ()

z Number of Modes to Extract ()

z Number of Modes to Expand () Calcucate elem results z Mass Matrix Formulation ()

z Prestress Effects Calculation ()

3 Modal Analysis ()( 10.3)OK

( 10.4)

10.4 z FREQBFREQE FREQB-1FREQE Reduced z PRMODE Jobname.out Reduced z Nrmkey [M]

*GET SET

z RIGID Subspace

PowerDynamics z SUBOPT Subspace PowerDynamics z CEkey Direct elimination method

Lagrange multiplier(quick)methodLagrange multiplier (accurate) method() Block Lanczos

3 (Reduced) ANSYS6.1Main Menu | SolutionMain Menu | Solution | Moster DOFs(MDOF)MDOF MDOFM,MGENMDOF TOTAL/MLISTMDOFMDELEMDOF

4 DOF DOF 10.1

jobname.MODE

10.1

GUI

Displacement (UX, UY, UZ,

ROTX, ROTY, ROTZ)

Constraints D Main Menu | Solution | -Loads-Apply |

-Structural-Displacement

10.2

10.3.1.3 Jobname.OUT Jobname.MODE

DOF DOF Reduced

Jobname.MODE Jobname.EMATJobname.ESAVJobname.TRI Reduced

1 ANSYS /SOLU GUIMain Menu | Solution 2 ANSYS 10.3 10.3

GUI Expansion Pass On/Off EXPASS Main Menu | Solution | -Analysis

Type-ExpansionPass No. of Modes to Expand MXPAND Main Menu | Solution-Load Step Opts -

ExpansionPass | Expand Modes Freq. Range for Expansion MXPAND Main Menu | Solution | -Load Step

Opts-ExpansionPass | Expand Modes Stress Calc. On/Off MXPAND Main Menu | Solution | -Load Step Opts-

ExpansionPass | Expand Modes 1 Expansion Pass

GUIMain Menu | Solution | Analysis Type | ExpansionPassExpansion Pass( 10.5) Expansion Pass ( ON)

1

2 EX() DENS(

)

10.3.2.2 1. ANSYS

/SOLU GUIMain Menu | Solution 2. 1(ANTYPE) Harmonic () Restart


2 GUIMain Menu | Solution | Analysis Type | Analysis Options

(Harmonic Analysis)( 10.7)Solution method()DOF printout format() Use lumped mass approx?(),

10.7

z Solution method ()[HROPT] Full ()Reduced ()Mode Superpons () Full () z DOF printout format ()[HROUT]

Jobname.out Realimaginary ()()Amplitud+phase () z Use lumped mass approx? ()[LUMPM]

()

Harmonic Analysis () Full Harmonic Analysis ()( 10.8)Equation Solver () Incl prestrss effects ()Frontal()Jacobi Conjugate Gradient(JCG) Incomplete Cholesky Conjugate Gradient(ICCG) Frontal

10.8 3

1 ()(Amplitude)(Phase angle)(Forcing frequency range)( 10.9)

10.9 // z Amplitude () z Phase angle ()()(

10.9)

z Forcing frequency range ()(/)

GUIMain Menu | Solution | Load Step Opts | Time/Frequenc | Freq and Substps z Damping () ALPHAD BETAD DMPRAT( 10.11)

10.11 3 z Printed Output[OUTPR]

Jobname.out z Database and Results File Output[OUTRES]

Jobname.RST z Extrapolation of Results[ERESX]

5

SOLVE GUIMain Menu | Solution | -Solve-Current LS 6 ( POST26)

7 SOLUTION FINISH GUIMain Menu | Finish

10.3.2.3 Jobname.RST z z (UX,UY,UZ,ROTX,TOTY,ROTZ) z z

EPELYEPELZUXUYUZ POST1 4

10.3.2.4 1 2 3 4 5

( POST26)

10.3.2.5 ( )

ANSYS/Linear Plus

1 2 3 4 5 1 z Lanczos PowerDynamics

() z z Reduced z

Jobname.MODE ()

2 Jobname.MODE () z [HROPT] z [HROPT] z [HROUT] z LVSCALE

3 Jobname.RFRQ

10.3.3

1 2 3

10.3.3.1 1 2 EX() DENS()

3

4 20

10.3.3.2

1 ANSYS /SOLU GUIMain Menu | Solution

2 1 (ANTYPE)

Restart(Restart Jobname.EMATJobname.ESAV Jobname.DB

Jobname.RST)(Transient)(Full)(Mass Matrix Formulation)


2 GUIMain Menu | Solution | Analysis Type | Analysis Options(Full Transient Analysis)( 10.12)

10.12

z Large Deformation Effects ()NLGEOM ()()(ON) z Stress Stiffening Effects ()SSTIF

ON(OFF)()

z Newton-Raphson Options ()NROPT z Equation Solver ()EQSLV

Iterative()// PCG 3 / 10.13

10.13 / Stepped Ramped

1 () z

/ z

z

z [NSUBST,2]

[KBC,1]

z IC

1 Restart

2

3ANSYS z z

4()

10.3.2.5 ()

1 2 3 4 5 1 z Lanczos PowerDynamics

() PowerDynamics

z z Reduced z

(Jobname.MODE) 2(Jobname.MODE)

z [HROPT]

z [HROPT] z [HROUT] z LVSCALE

3 Jobname.RFRQ

10.3.4

ANSYS(SPRS)

1 2 3 4 5

10.3.4.1

1

2 EX() DENS

10.3.4.2 () 10.3.1

1(Subspace)(Black Lanczos)PowerDynamic

2 3 GUI

4

1 2

Mode Combination Methods ()( 8.15)

8.15 ANSYS6.1 z SRSS z CQC z DSUM z GRP z NRLSUM

GUI SRSSCQCDSUMGRPNRLSUM GUIMain Menu | Solution | Load Step Opts | Spectrum | Single Point | Mode Combine

ANSYS6.1 z (DisplacementLabel= DISP) z (VelocityLabel=VELO) z (AccelerationLabel=ACEL) 3 SOLVE GUIMain Menu | Solution | Solve | Currend LS

POST1(Jobname.MCOM)POST1(Jobname.RST)

Jobname.MCOM POST1

1) (Label=DISP) 2) (Label=VELO) 3) (Label=ACEL) 4

10.3.4.6 POST1 Jobname.MCOM ()

()()()()()

POST1 1. Jobname.MCOM /INPUT GUIUtility Menu | File | Read From 2. 1 PLDISP GUIMain Menu | General PostProc | Plot Results | Deformed Shaped

2 PLNSOL PLESOL GUIMain Menu | General PostProc | Plot Results | -Contour Plot-Nodal Solu

SXSYSZEPELXEPELYEPELZUXUYUZ SUMTYPEPLNSOL

PLESOL SUMTYPE PLNSOL

PLNSOL PLNSOL

ANSYS6.1 POST1 PLETAB PLLS

PLVECT

10.3.4.7 (DDAM) DDAM 1()()

2 DDAM SPRS 3 ADDAM VDDAM SVTYPESV FREQ SED

4NRL

5 ADDAM VDDAM

10.3.4.8 (PSD) (PSD) 1 ANSYS ANSYS

2 3 YES FINISH

4 1(PSD)

2 3 1.0 0.0 D UXUYUZ F FXFYFZ

4 PSD 5 PSDRES

6 5 1

2 PSD

3 6 (POST1)(POST26)

1 POST1

2 POST26 PSDs

10.3.4.9 (MPRS) (PSD) 1 MPRS PSD

2,PSD 3() 4() 5 PSDCOM 6 POST1 Jobname.MCOM()

10 10.1 10.2 10.2.1 10.2.1.1 10.2.1.2

10.2.2 10.2.2.1 10.2.2.2

10.2.3 10.2.3.1 10.2.3.2

10.2.4 10.2.4.2 10.2.4.2 10.2.4.3

10.3 10.3.1 10.3.1.1 10.3.1.2 10.3.1.3 10.3.1.4

10.3.2 10.3.2.1 10.3.2.2 10.3.2.3 10.3.2.4 10.3.2.5

10.3.3 10.3.3.1 10.3.3.2 10.3.3.3 10.3.3.4 10.3.2.5

10.3.4 10.3.4.1 10.3.4.2 10.3.4.3 10.3.4.4 10.3.4.5 10.3.4.6 10.3.4.7 (DDAM)10.3.4.8 (PSD)10.3.4.9 (MPRS)

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第10章 动力学分析介绍.pdf

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第10章动力学分析介绍.pdf