Where can i find PCB model in academic ansys ?

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  • Last Post 17 June 2019
darrensxf posted this 11 June 2019

Hello guys, 

 

currently, I have to do analysis on PCB board so my question is do any of you know where can i find the PCB folder in academic ansys ? 

if not where can i download that folder ? ( please provide the link if possible) cause i tried to draw a simple rectangle shape with the FR4

material in it but my natural frequency was way too low . Please Help ~

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rwoolhou posted this 12 June 2019

Please can you explain exactly what you're trying to model (and why) as it's not clear from the post. 

darrensxf posted this 13 June 2019

HI, I try to do find deformation, shear and the natural frequency of a printed circuit board ( just the board without any component on it), I have already added in the material of FR4 to the board (basically just a rectangle shape) and realized that my frequency wasn't able to reach the minimum of 200 HZ ( from other researcher journal stated that PCB minimum should be around 200 Hz for natural frequency) do you have any idea why ?  

rwoolhou posted this 13 June 2019

I think that's structural: we also have several tools looking at chip design. 

Moving to the correct section. 

peteroznewman posted this 13 June 2019

Link to discussion on vibration of PCB that you might find helpful. 

Here is another discussion from the same student.

Discussion on Modal analysis of PCB

darrensxf posted this 16 June 2019

Thank you peter and rwoolhou for the replies, i managed to solve the problem. Just clearing some doubts,

1) For PSD G acceleration, under the tabular data what do I insert? as in for PSD DISPLACEMENT, i use the data from modal to generate PSD displacement but how about PSD G ACCELERATION (refer to the picture)?

 PSD G Acceleration

2) From some of the journal, they listed as 1G, 2G, 10G, 20G, etc. so my question is: i understood those are input to see the PSD Data but where do I input them? and from their journal, they are using the same frequency to test for different G, but as I insert into the Ansys it doesn't work. 

peteroznewman posted this 17 June 2019

Darren,

1) You don't seem to know what a PSD is or how to use it in a Random Vibration test. I recommend you read a textbook on Engineering Vibration to learn what a PSD is before you build a simulation model that uses one.

2) What journal are you talking about that had a list of accelerations from 1G to 20G? What does that have to do with your test?

Please provide a lot more information on what you were asked to do with the PCB board test and simulation, I mean really long and very detailed information.

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