simulating vibration exposure and sawtooth shock pulse in optistruct

Michelle Gasbarro_20360
Michelle Gasbarro_20360 Altair Community Member
edited July 2023 in Community Q&A

Hello,

I need to run Optistruct simulations for MIL-STD-810H Method 514.8 Annex C Vibration, and MIL-STD-810H Method 516.8 Procedure 1 Shock for a shelving system built inside a ground vehicle.  Can you please provide guidance on how to set up the loading for both of these simulations??

Thank you,

Michelle Gasbarro

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited April 2023

    usually these can be represented 2 ways:

    - running an equivalent static amplified loadcase, from a shock response spectrum (SRS), according to the modal contents of the model and pulse signal (i.e. acceleration factor of 1.8x)

    - or running a transient analysis, where you explicitly define the shock curve and perform the analysis. (i.e: half-sine, 6ms duration)

     

    For transient analysis there is a tutorial in the OptiStruct documentation that you could follow.

    Before going to your full model, I'd suggest trying in a simple model, ok?

  • Enrico Corallini
    Enrico Corallini Altair Community Member
    edited July 2023

    Hello,

    I started using Simlab software a few weeks ago.

    I have a similar problem; I need to study the structural behaviour under a sawtooth shaped pulse in 11ms and intensity 20g.
    I've read the tutorial "OS-T: 1315 Modal Transient Dynamic Analysis of a Bracket", but with Simlab I'm having some problems setting up my simulation. 
    Which solution type should I choose? 
    How can I set the sawtooth shaped pulse?

    Could someone help me?
    Thank you a lot

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