Creo Simulate dynamic random simulation analysis output PSD

[ykathur2]

Hi everyone,

I am trying to run a payload random vibration analysis in Creo Simulate of the cubesat rails with the top plate and two root actuators that deploy one panel. I have defined the PSD table with frequencies ranging from 20-2000Hz and ASD levels in (g^2/Hz) as uni-directional translation in the (1,1,1) direction. I have 2 problems:

1. When I try calcuating deflections of the panel, I get absurd values which are 1/3rd the size of the panel.

Do you have any suggestions on what I could be doing wrong? I know that's not a lot of information but I am open to ideas.

2. I need to get the output PSD response. I can't figure out how to get that. Can somebody help with that? 

[Chris3]

You should setup an acceleration measure at the base of your input to verify that the output is the same as the input. This is a basic check.

I don't think you want 1,1,1. This would apply the PSD in all directions at once. Industry standard is to apply to each direction individually (ie three seperate studies 1,0,0; 0,1,0 and 0,0,1)

You output PSD using measures. You need an acceleration measure.

https://learningexchange.ptc.com/tutorial/541/using-measures

[ykathur2]

I was able to successfully set up measures but I can't figure out how to obtain the information stored in measuers as a plot. Since I am trying to study the effects of the vibration on the panel as a function of frequency, would it be possible to output such information? If so, how do I do it? 

Thank you for all the help!

[Chris3 · Accepted solution]

In the simulate results, change the disply type to graph and then change the quantity to measure. Then click the measure icon to the left of "undefined" and pick your measure.