## General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

#### nonlinear modal analysis and connection between piezoelectrics

• vitor soeira
Subscriber
`I want to know how I make the non-linear modal of a beam. in this case there is a piezoelectric on the top of the beam and a piezoelectric on the bottom. I want to do the non-linear modal analysis (the force is very high) of the beam and the piezo. And the second thing I want to make the connection between the piezo in which when the one with less electrical potential is deformed, it sends voltage to the one with greater potential, thus deforming it.`
`the force acts in -y generating non-linearity, I have already defined beam coupling and piezo as structural and electrical. the beam is fixed.`

• Erik Kostson
Ansys Employee

Hi
Modal analysis in Ansys is a linear type of analysis. Also have in mind that the modal analysis does not include forces. As you show you use harmonic where we can have an excitation (force say), but again it is a linear analysis (so no large deflections or geometric nonlinearities).

I would recommend our course in modal and harmonic response also.
https://courses.ansys.com/index.php/courses/harmonic-response-analysis-in-ansys-mechanical/

So what you want to do needs the coupled field transient (with large deflections on).

As for the second part (voltage/potential), that is not possible to do in this system.
All the best

Erik

• vitor soeira
Subscriber

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• vitor soeira
Subscriber

you are wrong, non-linear modal analysis exists. I need help from someone who really understands. I spoke of force only to denote that the conditions of the system are not linear. You didn’t say where I can do this, so I can turn on, for example, the electric ansys?probably the solution is in apdl