Learning Forum

[Md_Salem]

Hello everyone,

I am doing optimization to select the optimum number of Piezoelectric patches on a plate using harmonic analysis at target natural frequency. After the modal analysis is done in the workbench, I use the next APDL code.

/post1

set,first

*GET,Fd1,MODE,1,FREQ

x11=Fd1-2.5

x12=Fd1+2.5

FINISH

/SOLU

ANTYPE,harmonic

HROPT,FULL

HROUT,ON

LUMPM,0

ESEL,S,ENAME,,226    ! Select all the piezo elements for all piezo patches.

NSEL,R,LOC,Z,0.001    ! Select the upper surface of them.

 

D,ALL,VOLT,ARG1        ! Apply the load ARG1 (voltage).

ALLSEL

 

ESEL,S,ENAME,,226

NSEL,R,LOC,Z,0

D,ALL,VOLT,0

 

ALLSEL

EQSLV, ,0,

PSTRES,0

HARFRQ,x11,x12

NSUBST,100

KBC,1

DMPRAT,8e-5

SOLVE

FINISH

 

The Piezo patches are added to the design modeler as an array where the number of coppies is parametrized.

How can I select the piezo patches individually to apply different voltage loads instead of selecting them all as shown in the upper code?

Regards

[Ashish Khemka]

Hi,

One suggestion - once you select all the SOLID226 elements then you can reselct them based on the locations, if that is a convenient option.

Regards,

Ashish Khemka

[Md_Salem]

hello,

The problem is that the number of generated bodies is large, so the locations are parametrized and generated according to the optimizer.

Regards