modeling membranre with prestress in abaqus and finding natural frequency and dynamics response

Hi everybady!!

I have problem with modeling membrane in abaqus tofind natural frequency and dynamics response.

if any body knows please help me.

looking forward to hear from you soon.


I found the thesis that

I found the thesis that explain the modeling of membrane, but i couldnt model it in abaqus.
at the end of file the code for modeling membrane in abaqus is wrotten, but it isnt working.
if anybody find the solution please help me!!!
download this file!!