Results Output by OptiStruct

The tables in this section summarize the results output for different analysis types. They show the formats available for each result and the I/O Option entry that controls the output of the result.

The columns in the tables represent the major output streams:

H3D	Hyper3D format (.h3d file)
HM	HyperMesh format (.res file)
OP2	Nastran Output2 format (.op2 file)
PCH	Nastran Punch format (.pch file)
OPT	OptiStruct ASCII format (multiple files)
PAT	Patran and Alternative-Patran formats (multiple files)
H3D (MBD)	Hyper3D format for body results (_mbd.h3d)
MRF	Multi-body results file (_mbd.mrf)

Results for Linear Static Analysis and Small Displacement Nonlinear Analysis

	H3D	HM	OP2	PCH	OPT	PAT	Controlling I/O Option
Nodal Displacements							DISPLACEMENT
Element Strain Energy							ESE
Element Stresses *							STRESS
Element Strains *							STRAIN
Ply Stresses							CSTRESS
Composite Failure Indices							CFAILURE
Ply Strains							CSTRAIN
Element Forces							FORCE
Grid Point Stresses							GPSTRESS
SPC Forces							SPCFORCE
MPC Forces							MPCFORCE
Grid Point Forces							GPFORCE
Applied Loads							OLOAD
Contact Force and Pressure							CONTF

Results for Linear Steady-state Heat Transfer Analysis

	H3D	OP2	PCH	Controlling I/O Option
Nodal Temperatures				THERMAL
Element Fluxes and Gradients				FLUX

Results for Linear Transient Heat Transfer Analysis

	H3D	OP2	PCH	Controlling I/O Option
Nodal Temperatures				THERMAL

Results for Normal Modes Analysis

	H3D	HM	OP2	PCH	OPT	PAT	Controlling I/O Option
Eigenvectors							DISPLACEMENT
Element Kinetic Energy							EKE
Element Strain Energy							ESE
Grid Point Energy							GPKE
Grid Point Stress							GPSTRESS
Element Stresses *							STRESS
SPC Forces							SPCFORCE
MPC Forces							MPCFORCE
Grid Point Forces							GPFORCE
Nodal Pressures (Fluid)							PRESSURE
Ply Stresses							CSTRESS
Ply Strains							CSTRAIN

Results for Complex Eigenvalue Analysis

	H3D	OP2	PCH	Controlling I/O Option
Eigenvectors				DISPLACEMENT

Results for Linear Buckling Analysis

	H3D	HM	OP2	PCH	OPT	Controlling I/O Option
Eigenvectors						DISPLACEMENT

Results for Frequency Response Analysis

	H3D	HM	OP2	PCH	OPT	XYPUNCH	Controlling I/O Option
Nodal Displacements							DISPLACEMENT
Modal Participation Displacements							SDISPLACEMENT
Element Energy Loss Per Cycle							EDE
Element Kinetic Energy							EKE
Element Strain Energy							ESE
Nodal Velocities							VELOCITY
Modal Participation Velocities							SVELOCITY
Nodal Accelerations							ACCELERATION
Modal Participation Accelerations							SACCELERATION
Element Stresses *							STRESS
Element Strains *							STRAIN
Modal Stresses **							STRESS
Modal Strains **							STRAIN
Element Forces							FORCE
SPC Forces							SPCFORCE
MPC Forces							MPCFORCE
Grid Point Forces							GPFORCE
Grid Point Stresses							GPSTRESS
Power Flow Field							POWERFLOW
Ply Stresses							CSTRESS
Ply Strains							CSTRAIN
Sound Power							SPOWER
Sound Intensity							SINTENS
Sound Pressure Level							SPL
Applied Load Vectors							OLOAD
Composite Failure Indices							CFAILURE

Results for Coupled Frequency Response Analysis of Fluid-structural Models (Acoustic Analysis)

	H3D	OP2	PCH	Controlling I/O Option
Nodal Displacements				DISPLACEMENT
Modal Participation Displacements				SDISPLACEMENT
Nodal Velocities				VELOCITY
Modal Participation Velocities				SVELOCITY
Nodal Accelerations				ACCELERATION
Modal Participation Accelerations				SACCELERATION
Nodal Pressures (Fluid)				PRESSURE
Element Stresses *				STRESS
Element Strains *				STRAIN
Element Forces				FORCE
SPC Forces				SPCFORCE
MPC Forces				MPCFORCE
Grid Point Forces				GPFORCE
Power Flow Field				POWERFLOW
Ply Stress				CSTRESS
Ply Strain				CSTRAIN

Results for Transient Analysis

	H3D	HM	OP2	PCH	OPTI	Controlling I/O Option
Nodal Displacements						DISPLACEMENT
Modal Participation Displacements						SDISPLACEMENT
Nodal Velocities						VELOCITY
Modal Participation Velocities						SVELOCITY
Nodal Accelerations						ACCELERATION
Modal Participation Accelerations						SACCELERATION
Element Stresses *						STRESS
Element Strains *						STRAIN
Modal Stresses **						STRESS
Modal Strains **						STRAIN
Element Forces						FORCE
MPC Forces						MPCFORCE
Ply Stresses						CSTRESS
Ply Strains						CSTRAIN
Composite Failure Indices						CFAILURE
Applied Load Vectors						OLOAD

Results for Random Response Analysis (PSDF Request)

	XYPUNCH	XYPLOT (HyperGraph)	PUNCH	OP2	H3D
DISP / VELO / ACCE
Shell Stress
Shell Strain
Solid Stress
Solid Strain
CBUSH Force
CELAS / CDAMP / CVISC Forces

Results for Random Response Analysis

	OP2	PCH	H3D	Controlling I/O Option
Displacement PSD and RMS				DISP, XYPEAK, XYPLOT, XYPUNCH
Velocity PSD and RMS				VELO, XYPEAK, XYPLOT, XYPUNCH
Acceleration PSD and RMS				ACCEL, XYPEAK, XYPLOT, XYPUNCH
PSD Element Force and RMS				FORCE, XYPEAK, XYPLOT, XYPUNCH
PSD Element Stress				STRESS, XYPEAK, XYPLOT, XYPUNCH
PSD Element Strain				STRAIN, XYPEAK, XYPLOT, XYPUNCH
RMS Element Stress				STRESS
RMS Element Strain				STRAIN

Results for Multi-body Dynamics Analysis

	H3D	HM	OP2	H3D (MBD)	MRF	Controlling I/O Option
Nodal Displacements						DISPLACEMENT
Nodal Velocities						VELOCITY
Nodal Accelerations						ACCELERATION
Element Stresses *						STRESS
Element Strains *						STRAIN
Body time history
System time history
Marker time history						REQUEST
Element and Joint Forces						MBFORCE

Results for Fatigue Analysis

	H3D	Controlling I/O Option
Element Life		LIFE
Element Damage		DAMAGE

Results for Geometric Nonlinear Analysis (ANALYSIS=EXPDYN)

	Controlling I/O Option	Controlling I/O Option (Block Format)
Nodal Displacements	DISPLACEMENT	/ANIM/VECT/DISP /ANIM/VECT/DROT
Nodal Velocities	VELOCITY	/ANIM/VECT/VEL
Nodal Accelerations	ACCELERATION	/ANIM/VECT/ACC
Element Stresses*	STRESS	/ANIM/BRICK/TENS/STRESS /ANIM/SHELL/TENS/STRESS/UPPER /ANIM/SHELL/TENS/STRESS/LOWER /ANIM/BEAM/VONM /ANIM/TRUSS/SIGX
Element Strains*	STRAIN	/ANIM/BRICK/TENS/STRAIN /ANIM/SHELL/TENS/STRAIN/UPPER /ANIM/SHELL/TENS/STRAIN/LOWER
Ply Stresses	CSTRESS	/ANIM/SHELL/TENS/STRESS/N /ANIM/SHELL/TENS/STRESS/ALL
Ply Strains	CSTRAIN	/ANIM/SHELL/TENS/STRAIN/ALL
Composite Failure Indices	CFAILURE	N/A
Element Forces	FORCE	/ANIM/Eltyp/FORC
Grid Point Stresses	GPSTRESS	/ANIM/GPS1/TENS /ANIM/GPS1/SHELL/UPPER /ANIM/GPS1/SHELL/LOWER
SPC Forces	SPCFORCE	/ANIM/VECT/FREAC /ANIM/VECT/MREAC
MPC Forces	MPCFORCE	/ANIM/VECT/FINT
Applied Loads	OLOAD	/ANIM/VECT/FEXT
Plastic Strain	STRAIN (PLASTIC)	/ANIM/ELEM/EPSP /ANIM/SHELL/EPSP/UPPER /ANIM/SHELL/EPSP/LOWER
Contact Force and Pressure	CONTF	/ANIM/VECT/CONT /ANIM/VECT/PCONT
Element Thinning and Thickness	THIN	/ANIM/ELEM/THIC /ANIM/SHELL/THIN
Element Energy	ENERGY	/ANIM/ELEM/ENER /ANIM/ELEM/HOURG

Optimization Results

	H3D	HM	OP2	PCH	OPT	PAT	Controlling I/O Option
Element Density							DENSITY
Element Thickness							THICKNESS
Ply Thickness							THICKNESS
% Thickness							THICKNESS
Shape							SHAPE

The element stress and strain results written to the various output streams are not always the same. Refer to the following pages for more details on the stress results available in the different output streams:

Strain Results Written in HyperView .h3d Format

Strain Results Written in Nastran .op2 and .pch Formats

Strain Results Written in HyperMesh .res Format

Stress Results Written in HyperView .h3d Format

Stress Results Written in Nastran .op2 and .pch Format

Stress Results Written in HyperMesh .res Format

** The Structural Modal Stresses and Strains and Residual Vectors are output in Modal Frequency Response Analysis via the STRESS(MODAL) and STRAIN(MODAL) options. A possible use-case for Modal Strains is to setup Modal FRF/Modal Transient Analysis and use the Modal Participation Factors and Modal Strains as input for Fatigue Analysis.