[Aashi171185]

Hey hello to every one i want to ask that is there any way to input acceleration vs time data in cfx as load e.g
acceleration vs time
0.2g at 1 sec
0.24g at 2 sec
0.3g at 3 sec
0.12g at 4 sec
and so on

[urosgrivc]

Yes, this can be easily done with user functions:

type: "user function" in the search above or google, it has been talked about a lot of times.
I have personally written it about 4 times already.

[slide 11 but do watch the whole video] -> https://slideplayer.com/slide/6255657/

[Aashi171185]

Thanks for your kind response God bless you

[mahesh1819]

Hi, Can anyone help how to input frequency (Hz) vs Acceleration (m/s^2) to CFX?

[aero_head]

Originally Posted by mahesh1819

Hi, Can anyone help how to input frequency (Hz) vs Acceleration (m/s^2) to CFX?

Do you mean you want to plot input frequency vs acceleration in CFX-Post? Because how to input them is explained by post #2.

[mahesh1819]

Originally Posted by aero_head

Do you mean you want to plot input frequency vs acceleration in CFX-Post? Because how to input them is explained by post #2.

HI, thanks for the reply. I came to know how to give frequency vs acceleration from post#2. But could not find the syntax about how to mention that function in gravity as shown in Fig-1. Please help

[ghorrocks]

Be aware that defining varying accelerations, especially varying accelerations in multiple directions is not fully supported by CFX. In other words it introduces additional terms into the equations which are not accounted for. This is especially for multiple directions as this will introduce rotations and then things like centripetal and coriolis effects are ignored.

If you want to model this accurately you need to use moving mesh and make the mesh motion prescribe your accelerations. But the approach you are using may be accurate enough, depending on how significant the additional terms which are not included are in your case.