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Difference between ANSYS-calculated amplitude and user-calculated amplitude in harmonic solution

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fabiangoericke

Mechanical
Jun 22, 2012
1
Hi all! I hope someone can help me with this weird problem:

I am running a harmonic analysis with piezoelectric elements. In the post-processor I am reading the electric flux z-component for a number of nodes (all of which are corner nodes). I am interested in the amplitude of the electric flux. I try two different ways of getting the amplitude:

1. I read it out directly using: set,1,j,,ampl

2. I read the real and imaginary parts using: set,1,j,,real and set,1,j,,imag and then combine them mathematically (squareroot of sum of squares).

In both cases the actual readout of the electric flux is done by: *get,elec_flux,node,nodenumber,d,z. The weird part is that both methods yield exactly the same value (as expected) for about two thirds of the nodes that I probe. But for the other one third of the nodes the two methods are off by a factor of 3 to 42.

Has anyone ever experienced anything like that? What am I doing wrong?

Any advice is highly appreciated! Thank you!
 
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