Hi everyone, please help me out in modalfit command for modal parameter extraction. Why mode shape vector plot is so erratic?

Hi everyone, please help me out in modalfit command for modal parameter extraction. Why mode shape vector plot is so erratic?

[KALYAN ACHARJYA]

Hope you will get enough answer here, Its not the question of eratic or not, its system response, what do you expect?

[Ayisha Nayyar]

Thanks a lot Kalayan sir, nut i know the response of the beam through ansys, but mode shape vectors do not support that, secondly, there is an issue that the values of natural frequency vary along the length of the beam, i guess due to that problem, mode shapes are not correct as frequency values vary along the length. please send me some help regarding curve fitting for modal parameter extraction in matlab.