When performing modal analysis the results obtained have some discontinuity in the mode shape, as shown in the figure below: <img width="851" height="468" alt="Image" src="https://github.com/user-attachments/assets/5adb745a-1ad8-41f2-bbb0-63abb88e2ef8" /> This phenomena happend in several models and with other people as @Raimundovpn and @leonardocabr.