Equation is not yielding the expected output

Pramod Mallipudi
Pramod Mallipudi Altair Community Member
edited February 2022 in Community Q&A

I am trying to find the roll-over limit of my 3 wheeled vehicle using the following formula:

image

Can you please tell me how I can write such an equation using the expression builder in MotionView.

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Answers

  • AnanthK
    AnanthK
    Altair Employee
    edited February 2022

    The equation you've posted appears to be an analytical hand calc of rollover as a function of half track-width and CG height. With a multibody model, you don't need to code this anywhere. Instead you would use your vehicle model to run a steady state cornering event like Constant Radius or swept steer. In these events, the lateral acceleration slowly ramps up (either by increasing speed around a constant radius corner, or by increasing steering wheel angle at a constant speed around a reducing radius corner), until the vehicle is no longer stable in roll. 

     

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