Highlights
- Calculation of the characteristic frequencies and modes of the member construction.
- Automatic calculation of the self-weight of the structure.
- Other weights can be entered as local or distributed loads or converted from earlier static calculations into dynamic weight.
- The user sets the desired number of characteristic values.
- For each characteristic value, the characteristic mode will be calculated with the subspace iteration method.
- The results can be represented both numerically and graphically.
Eigen frequencies can be required to verify comfort criteria for buildings, to analyse wind-induced resonance for bridges, to check requirements for sensitive equipment....
- Input of dynamic masses
- Selection of desired number of characteristic values
- Review of numerical and graphical results: frequency values, mass participation factors and modal shapes
Input of masses
- User input of nodal masses or linear distributed masses
- Automatic generation of masses from the self-weight
- Generation of masses from selected static load cases (converts downward vertical loads into masses)
- Regeneration of masses after modification of selected load cases
Output of results
- Table output of eigen frequencies for each calculated natural mode
- Table output of mass participation factors according to each global direction (X, Y and Z).
- Graphical display of animated eigenmode shapes
Eigen frequencies can be required to verify comfort criteria for buildings, to analyse wind-induced resonance for bridges, to check requirements for sensitive equipment.... You can apply this analysis type to structures containing surface elements (plates and shells) by performing a few steps:
- Input of dynamic masses
- Selection of desired number of characteristic values
- Review of numerical and graphical results: frequency values, mass participation factors and modal shapes
Required modules:
- sen.00