ANALYSIS

Subcase Information Entry The ANALYSIS command can be used in the I/O Options section to request that only a finite element analysis be performed (optimization input is ignored). It may also be used in the I/O Options or Subcase Information sections to identify the solution sequence for all subcases or for individual subcases, respectively.

Attention: Valid for Implicit and Explicit Analysis

Format

ANALYSIS = option

Definitions

Argument Options Description
option <ONLY, OPTSKIP, STATICS, NLSTAT, NLEXPL, MODES, MCEIG, BUCK, DCEIG, DFREQ, MFREQ, DTRAN, MTRAN, DFOUR, MFOUR, HEAT, NLHEAT, ELEC, MBD, SAERO, DIVERGE, FLUTTER, FATIGUE, RANDOM, STEADY> These options refer to the run control functionality of the ANALYSIS command:
ONLY (Default)
Performs Finite Element Analysis run only. Optimization inputs are checked, but ignored.
OPTSKIP
Performs Finite Element Analysis run only. Optimization inputs are ignored.
The remaining options refer to the solution sequence identification functionality of the ANALYSIS command:
STATICS
Linear Static or Nonlinear Quasi-Static Gap Analysis
NLSTAT
Nonlinear Static Analysis
NLEXPL
Explicit Dynamic Analysis
MODES
Normal Modes Analysis
MCEIG
Modal Complex Eigenvalue Analysis
BUCK
Linear Buckling Analysis
DCEIG
Direct Complex Eigenvalue Analysis
DFREQ
Direct Frequency Response Analysis
MFREQ
Modal Frequency Response Analysis
DTRAN
Direct Transient Response Analysis (Linear and Nonlinear)
MTRAN
Modal Transient Response Analysis
DFOUR
Direct Transient Response Analysis through Fourier transformation
MFOUR
Model Transient Response Analysis through Fourier transformation
HEAT
Linear Steady-State Heat Transfer Analysis or Linear Transient Heat Transfer Analysis
NLHEAT
Nonlinear Steady-State Heat Transfer Analysis, or Nonlinear Transient Heat Transfer Analysis
ELEC
Electrical analysis.
MBD
Multibody Dynamics Analysis
SAERO
Aeroelastic Trim analysis
DIVERGE
Aeroelastic Divergence analysis
FLUTTER
Aeroelastic Flutter analysis
FATIGUE
Fatigue Analysis
RANDOM
Random Response Analysis
STEADY
Steady State Analysis

Comments

  1. When ANALYSIS=ONLY or ANALYSIS=OPTSKIP are used:
    • only applicable in the I/O Options section
    • may be used in combination with one of the other ANALYSIS options.
    • all elements (including design elements) are treated as non-design elements.
    • all properties and grids referenced by size and shape variables will be set at the values on the associated property and GRID data.
  2. If an OptiStruct optimization model has DOPTPRM, DESMAX, 0, the number of license units checked out is the same as the checkout for an OptiStruct analysis job.