Inertia Relief in Nastran

Choosing the correct boundary condition is an important step of running a FEA analysis.

But what if the correct boundary condition is no constraint at all?

An aircraft in flight is in a state of static equilibrium. The aerodynamic forces on the vehicle are balanced out by inertial forces. Adding a constraint would not accurately model this problem.

That’s why we use Inertia Relief when analyzing full vehicle models.

Inertia Relief balances out the applied loads with equal and opposite accelerations, creating a state of static equilibrium and eliminating the need for constraints.

Nick Mehlig from Structures.Aero covers topic of Inertial Relief in NX Nastran, including:

• What is inertia relief?
• Setting up a static analysis with inertia relief in FEMAP
• Recovering OLOAD data from Nastran output

What was added and changed in the latest version of Femap (Version 12)?

Andrew shares all the new updates to Femap 12 including visualization improvements, geometry break at intersections, automatic rigid element update when meshing, data mapping, and more.

We keep track of changes to Femap in our Femap Change Log: https://structures.aero/software/fema...

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SDA (Structures.aero) provides both consulting services and software sales.  We provide expert level design and stress analysis to engineering companies around the world.  We primarily consult with aerospace companies but we also consult with companies from other industries.

We utilize Femap, NX Nastran, Fibersim, Simcenter 3D, and HyperSizer in our analysis work and provide these programs, training, and support as a Value-Added Reseller for Siemens PLM and HyperSizer.

For more information about the services we can provide or the software we sell please contact us by email at [email protected].

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