.disp file

The .disp file is an OptiStruct ASCII format results file.

File Creation

This file is created when the OPTI, OS or BOTH formats are chosen. (See documentation for the I/O Option OUTPUT).

File Contents

Result Description
Acceleration Acceleration results from frequency response analysis and linear transient analysis.

Output is controlled by the I/O Option ACCELERATION.
Displacement Displacement results from linear static, inertia relief, frequency response analysis, and linear transient analysis.

Output is controlled by the I/O Option DISPLACEMENT.
Eigenvector Eigenvector results from normal modes and linear buckling analysis.

Output is controlled by the I/O Option DISPLACEMENT.
Velocity Velocity results from frequency response analysis and linear transient analysis.

Output is controlled by the I/O Option VELOCITY.

File Format

The displacement file has the following format:
For each iteration, the following header is used:
iter Iteration Numids
Data
Description
iter
Keyword identifying that the next field is the iteration number.
Iteration
The iteration number.
Numids
The number of linear static subcases plus the number of calculated normal and buckling modes.
Within the iteration section, the following header is used for each linear static subcase, normal or linear buckling mode, or direct modal frequency response:
LCID Numnod Freq Result: SPCcase (Datatype)
Data
Description
LCID
Output ID for the subcase or mode. This is not necessarily the same as the subcase ID defined in the input data.
Numnod
Number of grids in the model.
Freq
Frequency or Buckling eigenvalue (1.0 for static subcases).
Result
Keyword declaring the result type given.
DISP indicates displacement result.
VELO indicates a velocity result (for frequency response analysis only).
ACCE indicates an acceleration result (for frequency response analysis only).
SPCcase
SPC set identification number for linear static, inertia relief, or frequency response subcases or 1 for eigenvectors.
Datatype
Keyword indicating the type of subcase involved.
LOAD declares data is from a static subcase.
EIGV declares data is from a normal modes subcase.
BKLV declares data is from a linear buckling subcase.
DFRQ declares data is from a direct frequency response subcase.
MFRQ declares data is from a modal frequency response subcase.
Within the subcase or mode section, the following information is provided for each node:
NID X disp Y disp Z disp
Data
Description
NID
Node identification number.
X
X displacement of the node.
Y
Y displacement of the node.
Z
Z displacement of the node.
The displacement file has the following format for linear transient analysis:
For each iteration, the following header is used:
iter Iteration
Data
Description
iter
Keyword identifying that the next field is the iteration number.
Iteration
The iteration number.
Within the iteration section, the following header is used for each transient analysis subcase:
Subcase Id Label
Time Time
Result Type Domain [Format]
Data
Description
Id
Output ID for the subcase. This is not necessarily the same as the subcase ID defined in the input data.
Label
Subcase label.
Time
Time increment information.
Format
Complex, Real, Imaginary, Phase, and so on.
Result Type
Keyword declaring the result type given.
DISP indicates displacement results.
VELO indicates a velocity result.
ACCE indicates an acceleration result.
Within the subcase section, the following information is provided for each grid:
GID X Y Z RX RY RZ
Data
Description
GID
Grid identification number.
X
X value of the grid.
Y
Y value of the grid.
Z
Z value of the grid.
RX
RX value of the grid.
RY
RY value of the grid.
RZ
RZ value of the grid.

Comments

  1. The I/O Option Previously Supported Results controls the frequency of output for analytical results during an optimization.