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Structures
Set up your model and run a structural analysis or optimization.
Structural Optimization
Set up and run a topology, topography, or gauge optimization.
Run Optimization
Define and run a topology, topography, or gauge optimization using the Run Optimization tool.
Optimization Options
In addition to selecting an optimization type, objective, and constraints, you can also select from a variety of additional options when running an optimization.
Inertia Relief (optimization)
Inertia relief allows the simulation of unsupported structures. Typical applications are an airplane in flight, suspension parts of a car, or a satellite in space.

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Parametric Modeling
Create parametric sketches, geometry, and PolyNURBS with construction history and variables.
Implicit Modeling
Create implicit models with primitives, lattices, point clouds, fields, offsetting, Booleans, inverting, smoothing, morphing, and filleting.
Structures
Set up your model and run a structural analysis or optimization.
- Model Setup
  Create connections and apply loads, constraints, materials, and manufacturing controls to your model.
- Structural Analysis
  Set up and run a linear static analysis using the SimSolid or OptiStruct solver. You can also analyze normal modes and buckling modes.
- Structural Optimization
  Set up and run a topology, topography, or gauge optimization.
  - Optimization Overview
    Optimization will find the most effecitve design for each design space in a model in response to the applied loading conditions on that model. You can run several different types of optimization including topology, topography,gauge, and PolyNURBS shape optimization.
  - Design Spaces for Optimization
  - Run Options: Local vs. Remote
    Choose whether to run jobs locally or on a remote job server.
  - Run Optimization
    Define and run a topology, topography, or gauge optimization using the Run Optimization tool.
    - Set Up and Run an Optimization
      To run an optimization, select the Run Optimization tool, choose a run type and objective, and click Run.
    - Optimization Types
      Several different types of optimization are available in Inspire, including topology, topography, and gauge optimization.
    - Optimization Objectives
      When running an optimization, your objective may be to maximize stiffness, maximize frequency, or minimize mass. Different objectives are available based on the type of optimization selected.
    - Optimization Constraints
      Most optimization constraints are applied using the Run Optimization window. The constraints that are available change based on the optimization type and objective.
    - Optimization Options
      In addition to selecting an optimization type, objective, and constraints, you can also select from a variety of additional options when running an optimization.
      - Speed/Accuracy (optimization)
        The Speed/Accuracy option allows you to prioritize speed or accuracy when running an optimization.
      - Gravity (optimization)
        The Gravity option allows you to include gravity when running an optimization, and to change its direction.
      - Load Cases (optimization)
      - Inertia Relief (optimization)
        Inertia relief allows the simulation of unsupported structures. Typical applications are an airplane in flight, suspension parts of a car, or a satellite in space.
    - Export a FEM File (optimization)
      Export a FEM file using the Export button on the Run Optimization window.
  - Show Optimization Results
    View and compare optimization results, view design violations, and explore the generated shape.
- Report
  Generate PPT or PDF reports from analysis results. The Report tools are available after you have run an analysis.
Motion
Set up and run a motion analysis, plot the results, and export the results.
Fluids
Prepare and run a computational fluid dynamics simulation.
Design Explorer
Evaluate designs by using geometric variables and applying a design-of-experiments (DOE) or optimization method. We recommend fully constraining your sketch when sketch variables are used in the design exploration.
Manufacture
Set up and run a basic porosity or thinning analysis.
Print 3D
Prepare and run an additive manufacturing simulation, and export a file for 3D printing.
Rendering
Adjust the materials and environment of objects in the scene to create a photorealistic image.
Inspire Python API
Learn how to access the Inspire Python API including online help, quick start demos, and the Extension Manager.
Reference
View the glossary, frequently asked questions, and errors and alerts.
Keyboard Shortcuts and Mouse Controls
Learn keyboard shortcuts and mouse controls for common operations.

Inertia Relief (optimization)

Inertia relief allows the simulation of unsupported structures. Typical applications are an airplane in flight, suspension parts of a car, or a satellite in space.

With inertia relief, the applied loads are balanced by a set of translational and rotational accelerations. These accelerations provide body forces, distributed over the structure in such a way that the sum total of the applied forces on the structure is zero.

You can select whether to use inertia relief in the Load Cases section of the Run Optimization window.

On the Strucutres ribbon, click the button on the Optimize icon. The Run Optimization window appears.

Tip: To find and open a tool, press Ctrl+F. For more information, see Find and Search for Tools.
Select an optimization type, objective, constraints, and options.
Click the chevron next to Load Cases to expand the section.
Select Use Inertia Relief.
Click the Run button to start the optimization using the selected load cases.
When complete, double-click the name of the run to view the results.