Learning Forum

[Jelson Dalmeida]

I was recently working on a project that involved the gavity of Mars (3.71m/s^2). I tried my hardest to change to gravity, but unfortunately there was only one standard earth gravity option available. Could someone please let me know if it's possible to do it, and if it's possible, what necessary steps should I follow?

Thanks in advance.

[peteroznewman]

Insert an acceleration load instead of a Standard Earth Gravity.  In an acceleration load you can type the value of 3.71 m/s^2.

Note that if you consider the +Y direction to be up, and you want mass to fall down in the -Y direction, you need to put a +3.71 value in the Y component of the acceleration load.  That will cause mass to fall down.

[Jelson Dalmeida]

Hey peteroznewman, thanks for the input. I did try that method then compared the results with standard earth gravity, but there was no much difference between Martian gravity and earth gravity. The difference was just (+ or -)0.001. And I even tried without having any sort of gravity input, still the results were the same as before.

Thanks in Advance.

[peteroznewman]

A small difference is still a difference. You don't say in what units 0.001 is measured. In some structural models, such as one that supports an optical surface such as a mirror or a lens, that would be a huge number. But from your post, it seems to be an unimportant difference.

If you want more advice, provide more information. What is the purpose of the analysis, what do you need to know?  What is the purpose of the structure?  How is it supported?  What other loads are there besides Mars gravity? Please insert an image of the geometry and mesh.

[Jelson Dalmeida]

Hey peteroznewman, thanks much for your help here. The previous method actually worked. Initially it showed the previous results, but once I tried the whole process once again it gave the results that I was expecting for. Thanks once again for helping me out in this :)

[Jelson Dalmeida]

Hey, Peteroznewman, do you know how to run a static structural analysis for a wheel? I have a lot of confusion with respect to loading and contact regions. I even want to know how things actually work; if you have some free time to spare, then do help me. If it's okay, then we can have a virtual meeting, and you can help me solve my model.

Thanks in advance.

[peteroznewman]

Hey Jelson, I can help you. What is the purpose of the analysis, what do you need to know?  What are the loads on the wheel? What type of tire is on the wheel? What is the suspension between the wheel axle and the vehicle? Is this a driven wheel? Do you have a ground profile? Please insert some images of the wheel and support structure.