OptiStruct Software | FEA Solver & Structural Optimization

OptiStruct – Advanced FEA Solver & Structural Optimization Software from Altair. Empower your engineering workflows with OptiStruct’s design optimization and coupled multiphysics analysis capabilities, backed by professional support from TrueInsight.

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What is OptiStruct?

Altair OptiStruct is a structural and optimization solver used for solving static, dynamic, linear, nonlinear, topology and topography optimization problems, and more!

It is most widely used where lightweight and efficient structures are needed. Great for optimizing for durability, NVH, or any rapidly developing products. 

Optimization types supported include topology optimization for large design spaces, topography optimization for stamped and sheet metal structures, and free-size optimization for identifying optimal thickness distributions in machined components or composite laminate layups.

 

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Key Features of Altair OptiStruct

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Complete Structural Analysis in One Solver

Altair OptiStruct is a unified FEA solver supporting linear and nonlinear analysis, dynamics, vibrations, fatigue, acoustics, and thermal simulations. Engineers can validate real-world structural behavior using a single, consistent solver workflow—reducing model duplication and setup time.

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Industry-Leading Structural Optimization

OptiStruct is the pioneer of topology, shape, size, and lattice optimization, enabling lightweight, high-performance designs. It allows engineers to optimize parts early in the design process, including composites and additive manufacturing structures, while meeting strength, stiffness, and durability targets.

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Real-World Multiphysics Simulation

OptiStruct enables coupled multiphysics analysis, including thermal-structural interactions, vibration, and integrated workflows for fluid-structure and electromagnetic-structure simulations.

OptiStruct Capabilities

High-Performance Finite Element Analysis

Altair OptiStruct delivers fast and accurate finite element analysis for linear and nonlinear problems, including static, dynamic, contact, and large-deformation simulations. Its solver efficiency makes it suitable for both early design studies and final validation.

Advanced Structural Optimization

OptiStruct supports topology, shape, size, free-size, and lattice optimization within the same solver. Engineers can automatically generate lightweight, high-performance designs while satisfying stiffness, strength, frequency, and durability requirements.

Multiphysics & Coupled Simulations

Run coupled simulations such as thermal-structural interactions, vibration, and acoustics, with integrated workflows for fluid-structure interaction and electromagnetic-structure analysis.

Durability, Fatigue & NVH Analysis

Built-in tools for fatigue life prediction, vibration analysis, and noise & vibration harshness (NVH) allow engineers to assess long-term performance and comfort early in the design cycle.

Composite & Advanced Material Modeling

OptiStruct provides robust support for composite laminates, orthotropic and nonlinear material behavior, and selected hyperelastic material models—ideal for aerospace, automotive, and lightweight structural applications.

Scalable Performance on CPUs & GPUs

Designed for high-performance computing environments, OptiStruct scales efficiently across CPUs and GPUs, enabling faster turnaround times for large models and complex optimization workflows.

Expert OptiStruct Support and Services from TrueInsight

With TrueInsight, Your OptiStruct Implementation is Easier

TrueInsight provides tailored support for your OptiStruct deployment — from onboarding and training to advanced workflow automation and optimization strategies.

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Learn More About OptiStruct

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How to Apply a 5-Axis CNC Milling Constraint in OptiStruct

In this blog post we will show you how to add a 5 Axis CNC Mill as a parameter in Altair OptiStruct.

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Altair OptiStruct: Techniques for Advanced Optimization

From topology optimization to parameter optimization, witness how OptiStruct enables engineers to achieve designs that are lighter, and more efficient.

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Permanent Deformation Analysis of a Control Arm with Altair OptiStruct

Altair OptiStruct is known for being a high-end solver for implicit and optimization techniques. This post shows how to maximize its capabilities.

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OptiStruct Users in Action

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Customer Story - L&L Products

Slashing Model Build time and optimizing part design and performance.

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Customer Story - Skidmore, Owings and Merrill

SOM Achieves Sustainability Objectives Through Innovative Design

Frequently Asked Questions

OptiStruct combines high-performance finite element analysis with industry-leading structural optimization in a single solver. Unlike many FEA tools that focus only on validation, OptiStruct enables engineers to optimize designs for weight, strength, durability, and performance early in the development process.

Altair OptiStruct is used for finite element analysis (FEA) and structural optimization. It helps engineers assess, optimize, and validate designs for strength, stiffness, durability, vibration, acoustics, thermal behavior, and multiphysics performance.

OptiStruct supports topology, shape, size, free-size, and lattice optimization. These methods enable the creation of lightweight, high-performance designs while meeting structural, dynamic, and durability requirements.

Yes. OptiStruct includes comprehensive nonlinear analysis capabilities such as large deformation, advanced contact, bolt and gasket modeling, and nonlinear material behavior, enabling accurate simulation of real-world operating conditions.

Yes. OptiStruct supports coupled multiphysics simulations including thermomechanical, fluid-structure, electromagnetic-structure interactions, as well as vibration, frequency response, acoustics, and noise, vibration, and harshness (NVH) analysis.

OptiStruct is widely used in industries such as automotive, aerospace, industrial machinery, energy, and electronics, where structural performance, lightweighting, durability, and multiphysics behavior are critical.

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