.strn file
The .strn file is an ASCII format results file.
File Creation
This file is created when OPTI, OS, or ASCII formats are chosen. (See documentation for the I/O Option OUTPUT).
File Contents
| Result | Description |
|---|---|
| Strain | Strain results from linear
static analysis and linear transient analysis. Output is controlled by the I/O Option STRAIN. |
File Format
The strain file has the following format for linear static analysis:
| For each iteration, the following header is used: | ||||||||||||||
| iter | Iteration | Numlds | ||||||||||||
- Data
- Description
- iter
- Keyword denoting the beginning of a new iteration.
- Iteration
- The Iteration number.
- Numlds
- The number of load cases for which this output is created.
| Each iteration section is divided up by subcase. Output for each subcase starts with a line in the following format: | ||||||||||||||
| Id | Number_of_els | STRN:Spc_id | ||||||||||||
- Data
- Description
- Id
- The output identification number for the subcase. This is not the same as the subcase ID used in the input data.
- Number_of_els
- The number of elements for which this output is requested.
- STRN
- A fixed keyword.
- Spc_id
- The SID for SPC's referenced by this subcase.
- Datatype
- Keyword indicating the type of subcase involved.
| Strain information is then provided, for each element, in the following format: | ||||||||||||||
| EID | Strain1 | Strain2 | Strain3 | Strain4 | Strain5 | Strain6 | Strain7 | |||||||
- Data
- Description
- EID
- The element identification number.
- Strain1
- von Mises strain for 2D and 3D elements, or Maximum Longitudinal strain for BAR/BEAM 1D elements.
- Strain2
- Normal X-strain at Z1 for 2D elements, Normal X-strain for 3D elements, or for BAR/BEAM it is the longitudinal strain at C at end A.
- Strain3
- Normal X-strain at Z2 for 2D elements, Normal Y-strain for 3D elements, or for BAR/BEAM it is the longitudinal strain at D at end A.
- Strain4
- Normal Y-strain at Z1 for 2D elements, Normal Z-strain for 3D elements, or for BAR/BEAM it is the longitudinal strain at E at end A.
- Strain5
- Normal Y-strain at Z2 for 2D elements, Shear XY-strain for 3D elements, or for BAR/BEAM it is the longitudinal strain at F at end A.
- Strain6
- Shear XY-strain at Z1 for 2D elements, Shear YZ-strain for 3D elements, or for BAR/BEAM it is the longitudinal strain at C at end B.
- Strain7
- Shear XY-strain at Z2 for 2D elements, Shear XZ-strain for 3D elements, or for BAR/BEAM it is the longitudinal strain at D at end B.
- Strain8
- For BAR/BEAM it is the longitudinal strain at E at end B.
- Strain9
- For BAR/BEAM it is the longitudinal strain at F at end B.
- Strain10
- For BAR/BEAM it is the Axial strain.
The strain 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.
Each section under iteration is divided up by subcase. Output for each subcase starts
with a line in the following format:
| Subcase | Id | Label | ||
| Time | Time | |||
| Result Type | (Entity Type) | [Format] | ||
Where,
- Data
- Description
- Id
- Output identification number for the subcase. This is not the same as the subcase ID used in the input data.
- Label
- Subcase level.
- Time
- Time increment information.
- Entity Type
- Beam, Rod, Plate, and so on.
- Format
- Complex, Real, Imaginary, Phase, and so on.
The strain result format information is the same as the linear static analysis format.
Comments
- The I/O Option Previously Supported Results controls the frequency of output for analytical results during an optimization.