Array Thank you for the explanation Peter. Here is the link to the Ansys Project Archive. https://drive.google.com/file/d/17OawW-uG_8_a7jy1SvsLijDf2EQ27cF0/view?usp=sharing. The version I am using is 19.2. I have create two seperation models. One is with distributed mass and the other one is with point mass. If you have the time, could you create another model with the methods you mentioned with adjusting the density in the file as an e.g.? I did not fully grasp it. Thank you in advance for your help. n