Features
Finite Element Analysis
- Structural Analysis
- Linear Static Analysis
- Linear Buckling Analysis
- Small Displacement Nonlinear Analysis
- Large Displacement Nonlinear Static Analysis
- Explicit Dynamics (Radioss Integration)
- Normal Modes Analysis
- Frequency Response Analysis
- Complex Eigenvalue Analysis
- Random Response Analysis
- Response Spectrum Analysis
- Transient Response Analysis (linear and nonlinear)
- Thermal Analysis
- Linear Steady-State Heat Transfer Analysis
- Linear Transient Heat Transfer Analysis
- Nonlinear Steady-State Heat Transfer Analysis
- Contact-based Thermal Analysis
- Acoustic Analysis
- Coupled Frequency Response Analysis of Fluid-Structure Models
- Radiated Sound Analysis
- Fatigue Analysis
- Uniaxial Fatigue (SN and EN)
- Multiaxial Fatigue (SN and EN, Dang Van Criteria)
- Weld Fatigue
- Seam Weld Fatigue
- Vibration Fatigue (Transient, Sine Sweep, Random Response)
- Rotor Dynamics
- Fast equation solver
- Sparse matrix solver
- Iterative PCG solver
- Lanczos and AMSES eigensolver
- SMP parallelization
- SPMD parallelization (Load Decomposition and Domain Decomposition Method)
- Fast Modal Solution Solver for Modal Frequency Response (PARAM,FASTFR)
- DMIG input
- AMLS interface
- FastFRS interface
- GPU support
- Advanced element formulations
- Triangular, quadrilateral, first and second order shells
- Axisymmetry
- Laminated shells
- Continuum shells
- Hexahedron, pyramid, tetrahedron first and second order solids
- Bar, beam, bushing, and rod elements
- Spring, mass, and damping scalar elements
- Mesh independent gap and weld elements
- Rigid elements
- Joint
- Concentrated and non-structural mass
- Direct matrix input
- Geometric element quality check
- Local coordinate systems
- Multi-point constraints
- Contact, tie interfaces
- Prestressed analysis
- Linear-elastic materials
- Isotropic
- Anisotropic
- Orthotropic
- Nonlinear materials
- Elastoplastic
- Hyperelastic
- Viscoelastic
- Gasket
- User-defined material
- Material consistency checks
- Ground check for unintentionally constrained rigid body modes.
Modeling Techniques
- Parts and Instances
- Subcase Specific Modeling
- Local - Global (Zooming)
- Model Change (Contact and elements) for Nonlinear Analysis
- Direct Matrix Input (Superelements)
- Direct Matrix Input
- Creating Superelements
- Component Dynamic Analysis
- Flexible Body Generation
- Poroelastic Materials
Multibody Dynamics
- Solution sequences
- Kinematics
- Dynamics
- Static
- Quasi-static
- Linearization
- Bodies
- Rigid
- Flexible
- Flexible body generation in using the CMS modeling technique, integrated with multibody analysis if the model is set up in OptiStruct.
- Constraints (between any body, flexible, or rigid)
- Joints: Ball (spherical), free, fixed, revolute, translational, cylindrical, universal, planar, at-point, in-plane, parallel-axes, orient, perpendicular-axes, constant velocity, and in-line.
- Gear
- Couplers
- Higher-pair joints: point-to-curve, point-to-surface, curve-to-curve, curve-to-surface, and surface-to-surface constraints.
- Loads
- Forces
- Gravity
- Motions (Joint and Marker)
- Initial velocities (Body and Joint)
- Function Expressions
Optimization
- General optimization problem formulation for all optimization types
- Response based
- Equation utility
- Interface to external user-defined routines
- Minmax (maxmin) problems
- System identification
- Continuous and discrete design variables
- Solution sequences for optimization
- Linear static
- Normal modes
- Linear buckling
- Quasi-static nonlinear (gap/contact)
- Frequency response (modal method)
- Acoustic response
- Random response
- Linear steady-state heat transfer
- Coupled thermo-mechanical
- Multibody dynamics
- Fatigue
- Responses for optimization
- All optimization types:
- Compliance
- Frequency
- Compliance index
- Volume
- Mass
- Volume fraction
- Mass fraction
- Center of gravity
- Moments of inertia
- Displacement
- Velocity
- Acceleration
- Temperature
- Pressure
- Stress/Strain
- Composite Stress/Strain/Failure
- Force
- Factor and Marge of safety
- Buckling factor (with limitations in topology/free-size optimization)
- Fatigue life/damage
- Grid Point Force
- Resultant Force
- Bore Distortion Response
- Contact force/pressure
- Gasket pressure
- Solid corner and grid point stress
- Response spectrum displacement and stress
- Stress/Strain based on Neuber correction
- Equation Response (DRESP2)
- User-defined Responses (DRESP3)
- All optimization types:
- Automatic selection of best optimization algorithm
- Convex approximation method (DUAL, DUAL2)
- Method of feasible directions (MFD)
- Sequential quadratic programming (SQP)
- BIGOPT
- Automatic selection of best method for design sensitivity analysis
- Direct method
- Adjoint variable method
- Topology, free-size, topography, size, shape, and free-shape optimization problems can be solved simultaneously
- Multi-disciplinary optimization using combinations of the supported solution sequences
- Mode tracking
- Mode Identification using Frequency Response subcase
- Multiple Models Optimization (MMO)
- Global Search Option
- Mode tracking
- Failsafe Topology Optimization
- Reliability-based Design Optimization
- Multiple Material Topology Optimization
- Topology Lattice Optimization
Topology Optimization
- Generalized optimization problem formulation
- Multiple load cases with different solution sequences in combination
- Stress/Strain responses in Topology design space for static and frequency response
- Density method
- 1D, 2D, and 3D elements in the design space
- Non-design space can contain any element type and response
- Extensive manufacturing control:
- Minimum member size control to avoid mesh dependent results
- Maximum member size control to avoid large material concentrations
- Draw direction constraints
- Extrusion constraints
- Pattern grouping
- Pattern repetition
- Multiple symmetry planes
- Checkerboard control
- Discreteness control
- Smoothing and geometry generation for 3D results
Free-Size Optimization
- Generalized optimization problem formulation
- Multiple load cases with different solution sequences in combination
- Stress/Strain and the composite stress/strain responses in free-size design space for static and frequency response
- Shell element thickness and composite ply-thickness design variables
- Non-design space can contain any element type and response
- Extensive manufacturing control:
- Minimum member size control to avoid mesh dependent results
- Maximum member size control to avoid large material concentrations
- Pattern grouping
- Pattern repetition
- Multiple symmetry planes
- Manufacturing Constraints for Composites
Topography Optimization
- Shape optimization for shells with automated design variable definition
- Easy set up with one DTPG card
- Extensive bead pattern control to allow for manufacturing constraints
- Pattern grouping
- Pattern repetition
- Multiple symmetry planes
- Discreteness control
- Maximum bead width control
- Direct launch of OSSmooth from Topography job
Size (Parameter) Optimization
- Shell, rod, and beam properties can be designed
- Spring and concentrated mass properties can be designed
- Composite ply thickness and ply angle can be designed
- Material properties can be designed
- Continuous and discrete design variables
- Manufacturing Constraints for Composites
Shape Optimization
- Perturbation vector approach
- Shape functions are defined through DVGRID cards
- Continuous and discrete design variables
- Remeshing option using HyperMesh
Free-shape Optimization
- Perturbation vector approach
- Automatic generation of perturbation vectors
- Reduction of stress concentrations
- Manufacturing constraints
- Remeshing option using HyperMesh
Structural Optimization in Multibody Dynamics Systems
- Equivalent Static Load (ESL) method
- Size, shape, free-shape, topology, topography, free-size, and material optimization of flexible bodies in multibody dynamics systems
- Generalized optimization problem definition
- Large number of design variables and constraints
Pre-process
- Fully supported in HyperMesh, SimLab and MotionView
- Nastran type input format
Post-process
- HyperView
- Direct output of H3D format for model and results
- Direct output for iteration history
- Export of iso-density surface in STL format
- HyperGraph
- Iteration history graphs
- Sensitivity bar charts
- Complex frequency response displacement, velocity, and acceleration plots
- Random response PSD and auto/cross correlation of displacement, velocity, and acceleration
- Transient response displacement, velocity, and acceleration time history plots
- Bar chart for effective mass
- HTML report
- Model summary
- Model and result displayed using HyperView Player
- HyperMesh
- Direct binary result file output
- SimLab
- Microsoft Excel
- Design sensitivities for size and shape variable approximations
- Support of Nastran Punch and OP2 output formats