Integrated Fast and Large Scale Eigenvalue Solver
A built-in, standard feature of Altair® OptiStruct® in an Automated Multi-level Sub-structuring Eigen Solver (AMSES) that can rapidly calculate thousands of modes with millions of degrees of freedom.
Advanced NVH Analysis
OptiStruct provides unique and advanced functionality for NVH analysis including one-step TPA (Transfer Path Analysis), Powerflow analysis, model reduction techniques (CMS and CDS super elements), design sensitivities, and an ERP (Equivalent Radiated Power) design criterion to optimize structures for NVH.
Robust Solver for Nonlinear Analysis and Powertrain Durability
OptiStruct has grown to support a comprehensive range of physics for powertrain analysis. This includes solutions for heat transfer, bolt and gasket modeling, hyperelastic materials, and efficient contact algorithms.
Creating Design Concepts
Topology Optimization: OptiStruct uses topology optimization to generate innovative concept design proposals. OptiStruct generates an optimal design proposal based on a user-defined design space, performance targets, and manufacturing constraints. Topology optimization can be applied to 1-D, 2-D and 3-D design spaces.
Topography Optimization: For thin-walled structures, beads or swages are often used as reinforcement features. For a given set of bead dimensions, OptiStruct's topography optimization technology will generate innovative design proposals with the optimal bead pattern and location for reinforcement to meet certain performance requirements. Typical applications include panel stiffening and managing frequencies.
Free-size Optimization: Free-size optimization is widely applied in finding the optimal thickness distribution in machined metallic structures and identifying the optimal ply shapes in laminate composites. Element thickness per material layer is a design variable in free-size optimization.
Optimization for Design Fine-Tuning
Size Optimization: Optimal model parameters such as material properties, cross-sectional dimensions, and gauges can be determined through size optimization.
Shape Optimization: Shape optimization is performed to refine an existing design through user-defined shape variables. The shape variables are generated using the morphing technology – HyperMorph – available in Altair® HyperMesh®.
Free-shape Optimization: OptiStruct’s proprietary technique for non-parametric shape optimization automatically generates shape variables and determines optimal shape contours based on design requirements. This relieves users from the task of defining shape variables and allows for greater flexibility for design improvements. Free-shape optimization is very effective in reducing high-stress concentrations.
Design and Optimization of Laminate Composites
A unique 3-phase process has been implemented in OptiStruct to aid in the design and optimization of laminate composites. The process is based on a natural and easy-to-use ply based modeling approach. This also facilitates incorporating various manufacturing constraints, such as ply drop-off, specific to laminate composite design. Application of this process yields optimal ply shapes (phase 1), optimal number of plies (phase 2) and the optimal ply stacking sequence (phase 3).
Design and Optimization of Additively Manufactured Lattice Structures
Lattice structures offer many desirable characteristics such as lightweight and good thermal properties. They are also highly desirable in biomedical implants due to their porous nature and the ability to facilitate the integration of tissue with the trabecular structure. OptiStruct has a unique solution to design such lattice structures based on topology optimization. Subsequently, large scale sizing optimization studies can be run on the lattice beams while incorporating detailed performance targets such as stress, buckling, displacement and frequency.
Stiffness, Strength and Stability
Linear and nonlinear static analysis with contact and plasticity
Large displacement analysis with hyperelastic materials
Fast contact analysis
Noise and Vibrations
Normal modes analysis for real and complex eigenvalue analysis
Direct and modal frequency response analysis
Random response analysis
Response spectrum analysis
Direct and modal transient response analysis
Preloading using nonlinear results for buckling, frequency response, and transient analysis
Coupled fluid-structure (NVH) analysis
AMSES large scale eigenvalue solver
Fast large scale modal solver (FASTFR)
Result output at peak response frequencies (PEAKOUT)
One-step transfer path analysis (PFPATH)
Radiated sound analysis
Frequency-dependent and poro-elastic material properties
1D and 3D bolt pretension
Contact modeling and contact-friendly elements
Plasticity with hardening
Temperature dependent material properties
Heat Transfer Analysis
Linear and nonlinear steady-state analysis
Linear transient analysis
Coupled thermo-mechanical analysis
One-step transient thermal stress analysis
Contact-based thermal analysis
Kinematics and Dynamics
Static, quasi-static, and dynamic analysis
Loads extraction and effort estimation
Optimization of system and flexible bodies
Topology, topography, and free-size optimization
Size, shape, and free-shape optimization
Design and optimization of laminate composites
Design and optimization of additively manufactured lattice structures
Equivalent static load method