1.Please iam running nonlinear FEA on plates and I want to know how to get the appropriate imperfection scale factor to use in modifying the mode shape in the edit keyword data line?

2.How do I relate my nonlinear results to the linear eigenvalue results gotten earlier? I have used the Load proportionality factor(LPF) but getting low % of load causing the instability ( say 25%) and iam concern. What is a reasonable % I should expect?

3. Does the imperfection scale factor influence the analysis results?

Thank you in advance for solution.

Pam