.gpf file

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

File Creation

Creation of this file is controlled by the GPFORCE I/O Option.

File Contents

Result Description
Grid point force balance table Grid point force balance table for linear static analysis.

File Format

The file is divided up by iteration. Output from each iteration starts with a line in the following format:
ITERATION Iteration_number
Data
Description
ITERATION
Keyword denoting the beginning of a new iteration.
Iteration_number
Iteration number.

Each iteration section contains a force balance table for each node, for which this output format was selected, in each linear static subcase.

These tables are given the following header:
Grid point forces for node Node_id Subcase ID = Subcase_id
Data
Description
Node_id
ID of the node to which the force balance table applies.
Subcase_id
User-defined subcase ID to which the force balance table applies.
The force information is provided, for each contributing element, constraint or load, in the following format:
Force_type Element_id x-force y-force z-force x-moment y-moment z-moment
Data
Description
Force_type
SPC - Force contribution of single-point constraints.
Appl. - Force contribution of Applied loads.
F-MPC - Force contribution of rigid elements and multi-point constraints. 2
Elem - Force contribution of elastic elements.
Rigid - Force contribution of rigid elements (RBEx, RROD, RSPLIN, and so on). 2
MPC - Force contribution of MPCs.
Total - The sum of all the force contributions.
Element_id
Only valid for force contributions from elastic elements or Rigid elements. This is the element's ID.
x-force
The x-translational component of the force.
y-force
The y-translational component of the force.
z-force
The z-translational component of the force.
x-moment
The x-rotational component of the force.
y-moment
The y-rotational component of the force.
z-moment
The z-rotational component of the force.

Comments

  1. The I/O Option Previously Supported Results controls the frequency of output for analytical results during an optimization.
  2. By default, the F-MPC output contains GPF contribution from both MPCs and rigid body elements (RBEx, RROD, RSPLIN, and so on). Additionally, rigid body element contributions and MPC contributions are separately printed to the .gpf file. The SYSSETTING(GPFMPC=FMPC/SEPAR) options can be used to control this output.