Step Type-Ultrasonic Simulation

[mhdiab]

Hey all,

I am trying to simulate ultrasonic waves(Lamb waves) in a plate. I was wondering what type of step analysis I should use. I am currently using the static/general step but I am not getting good results. Also, what is the difference between the different steps? I have also tried to run the getting started example "Stress Wave Propagation in a Bar" using static/general step analysis but did not get the right result compared to the original dynamic, explicit analysis step used in the example. Thank you for your time , I really I appreciate the help!

Regards.

 

[IceBreakerSours]

Oh boy!

Well, if you are interested in the time-dependent phenomena, then quasi-static, dynamic/implicit, explicit etc. are your choices. On the other hand, if you do not care about the transient phenomena and are only interested in the final (as t->inf) state, then static analysis is the right type of analysis. So, it all comes down to the specific problem of interest.

With this information, it should be clear why the example gave you results that do not make sense.

Are you new to this forum? If so, please read these FAQ:

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083

 

[mhdiab]

Hey,

Wow things make sense now! The wave was reaching the far end of the plate in ZERO time with the static analysis!
I am definitely interested in the time-dependent phenomena. Do you have any idea which analysis type is the best for an ultrasonic wave propagation simulation? Also, I think I tried the Implicit analysis and did not get good results. Do you know what't the difference between the Implicit and the Explicit?
Thank you for taking the time to respond.

Regards,

 

[IceBreakerSours]

I recommend reading up on the background. There is a LOT of information available in the documentation and online.

Are you new to this forum? If so, please read these FAQ:

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083