SaiD
Ansys Employee

Hi,


I am not sure what the regions C, D, E look like. Could you clarify that? Do you think you have rigid body modes anywhere?


Other thing I was wondering about was the stress in the steel cables. A stress in the cables (i.e. the presence of prestress) will alter the natural frequency of the bridge. Does the data that reports a natural frequency of 3 Hz consider any prestress that you may not have considered here?