.strs file

The .strs 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
Stress	Stress results from linear static analysis and linear transient analysis. Output is controlled by the I/O Option STRESS (or ELSTRESS).

File Format

The stress 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: Iteration number.
Numlds: Number of load cases for which this output is created.

For each iteration, the following header is used:


Each iteration section is divided up by subcase. Output for each subcase starts with a line in the following format:
		`Id`			`Number_of_els`					`STRS`:`Spc_id`(`Datatype`)

Data: Description
Id: Output identification number for the subcase. This is not the same as the subcase ID used in the input data.
Number_of_els: Number of elements for which this output is requested.
STRS: Fixed keyword.
Spc_id: SID for SPC's referenced by this subcase.
Datatype: Keyword indicating the type of subcase involved.; LOAD declares data is for a linear static subcase.

Stress information is then provided, for each element, in the following format:


	`EID`	`Stress1`	`Stress2`	`Stress3`	`Stress4`	`Stress5`	`Stress6`	`Stress7`	`Stress8`	`Stress9`

Data: Description
EID: Element identification number.
Stress1: von Mises stress for 2D and 3D elements, Maximum Longitudinal stress for BAR/BEAM 1D elements, or Axial stress in CWELD elements.
Stress2: Normal X-stress at Z1 for 2D elements, Normal X-stress for 3D elements.; For BAR/BEAM it is the longitudinal stress at C at end A. Maximum tensile stress at end A for CWELD elements.
Stress3: Normal X-stress at Z2 for 2D elements, Normal Y-stress for 3D elements, or Axial stress for 1D elements.; For BAR/BEAM it is the longitudinal stress at D at end A. Minimum tensile stress at end A for CWELD elements.
Stress4: Normal Y-stress at Z1 for 2D elements, Normal Z-stress for 3D elements, or Axial stress for 1D elements.; For BAR/BEAM it is the longitudinal stress at E at end A. Maximum tensile stress at end B for CWELD elements.
Stress5: Normal Y-stress at Z2 for 2D elements, Shear XY-stress for 3D elements, or Axial stress for 1D elements.; For BAR/BEAM it is the longitudinal stress at F at end A. Minimum tensile stress at end B for CWELD elements.
Stress6: Shear XY-stress at Z1 for 2D elements, Shear YZ-stress for 3D elements, or Axial stress for 1D elements.; For BAR/BEAM it is the longitudinal stress at C at end B. Maximum shear stress for CWELD elements.
Stress7: Shear XY-stress at Z2 for 2D elements, Shear XZ-stress for 3D elements, or Axial stress for 1D elements.; For BAR/BEAM it is the longitudinal stress at D at end B. Bearing stress for CWELD elements.
Stress8: For BAR/BEAM it is the longitudinal stress at E at end B.
Stress9: For BAR/BEAM it is the longitudinal stress at F at end B.
Stress10: For BAR/BEAM it is the Axial stress.

The stress file has the following format for linear transient analysis:


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: Number of load cases for which this output is created.

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.