Do we need to apply loads as well as reactions both in a static analysis while solving with Inertia relief method

Naushad Ali
Naushad Ali Altair Community Member
edited January 4 in Community Q&A

Hello,

I am doing an analysis of a 3-wheeler truck chassis.  

There are a few different load cases, where I need to do a static analysis with an inertia relief approach. 

Do I need to apply loads as well as reactions BOTH in a static analysis while solving with the Inertia relief method?

Or do I only have to apply either a load or a reaction? Kindly suggest.

Thank you & BR

Naushad

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Answers

  • Jason_Craanen
    Jason_Craanen
    Altair Employee
    edited January 4

    Hello,

    I would take a look at the help as there are a couple options available

    https://help.altair.com/hwsolvers/os/topics/solvers/os/loads_and_bc_os_c.htm#inertia_relief_r

    Inertia Relief

    Allows the simulation of unconstrained 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. This provides the steady-state stress and deformed shape in the structure as if it were freely accelerating due to the applied loads. Boundary conditions are applied only to restrain rigid body motion. Because the external loads are balanced by the accelerations, the reaction forces corresponding to these boundary conditions are zero.

    This calculation is automated.

    Inertia relief boundary conditions may be defined in the Bulk Data section of the input deck or they may be determined automatically by the solver.

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