.pret file

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

File Creation

Creation of this file is controlled by the PRETBOLT I/O Options Entry.

File Contents

Result Description
Pretension force/adjustment Pretension force/adjustment values for pretension bolts in pretensioning and pretensioned subcases.

File Format

The file is sorted by iteration. Output from each iteration starts in the following format:
PRETENSION FORCE/ADJUSTMENT VALUES ON THE PRENTESION SECTIONS
 
  ITERATION Iteration_number
Where:
Data
Description
ITERATION
Keyword denoting the beginning of a new iteration.
Iteration_number
The iteration number.
 
Each iteration section contains the force/adjustment values for each pretension bolt in each static subcase. Each such subcase section is given the following header:
  Subcase Subcase_id Subcase_label
Where:
Data
Description
Subcase
Keyword denoting the beginning of the current subcase section.
Subcase_id
The user-defined subcase ID
Subcase_label
The user-defined subcase label
 
Pretension force/adjustment information is then provided, for each bolt, in the following format:
  Pretension section ID (PRETENS #) Force-incr Adjust-incr Force-tot Adjust-tot    
Where:
Data
Description
Pretension section ID
Denotes the pretension section ID (SID of the PRETENS Bulk Data Entry).
Force-incr
The incremental pretension force value when compared to the previous subcase in the loading sequence.
Adjust-incr
The incremental pretension adjustment value when compared to the previous subcase in the loading sequence.
Force-tot
The total pretension force value.
Adjust-tot
The total pretension adjustment value.

Comments

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