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Transmissibility vs. Frequency Plot

Transmissibility vs. Frequency Plot

Transmissibility vs. Frequency Plot

(OP)
Does anyone know of a way to obtain a transmissibility (Q) vs. frequency plot in ANSYS Workbench 14.0? From what I understand, it's possible to obtain it through commands, but my MAPDL coding skills aren't that strong, so I'd appreciate any help you can offer.

Thanks!

RE: Transmissibility vs. Frequency Plot

Hi Jradio,

Just to be clear, you want the transmissibility as in the transmitted forces through or onto and object, as you would see from a vibrations or control systems analysis, correct? Sometimes the term has other engineering uses, so I want to be clear. :) Or are you trying to use this with Maxwell to do an electromagnetic analysis?

Second, you should be able to do this with code, as you stated. I will need to review my coding material later, but essentially I believe you may need to define your own variable set, using program defined functions for inputs and then use a probe to monitor your output.

However, the manner of which you would go about this will vary upon what method you are using to model this all. Are you using a "Modal" or "Response Spectrum" analysis? Or a 'rigid body dynamics' set up? Different parts of the newer system at times will need the code adjustments,from Python for the Workbench system itself or the traditional APDL commands.

~ Kherszal

RE: Transmissibility vs. Frequency Plot

(OP)
It's kinda funny that I'm getting and answer now since just today, actually, I may have figured it out. But I'm always on the lookout for better ways!

First, yes your definition of transmissibility is correct and is exactly what I'm looking for. Second, I was looking to get this from either a response spectrum analysis or a harmonic analysis. I wasn't aware that this was something you could get from a modal analysis, so I'm very interested in that method, if you have a way!

The method that I have solves a harmonic analysis using a displacement load at the boundary conditions and measuring the output displacement at a node divided by whatever input displacement that I set (typically I'll just use 1 inch) using the quot command and then output the results onto a graph. If you see anything wrong with this method, please let me know. And thanks for responding! I appreciate your help with this!

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