Finds the natural frequencies of a structure and its vibrating mode
shapes. Supports membranes, solids and space frames. Complex
structures having rotational periodicity, such as turbine wheels can
be efficiently solved by exploiting cyclic symmetry.
Modal vibration elements
2D membrane
- »3 node, constant strain triangle
- »6 node, linear strain triangle
- »4 node, bilinear quadrilateral
- »8 node, quadratic quadrilateral
3D solid
- »4 & 10 node, tetrahedron
- »5 & 13 node, pyramid
- »6 & 15 node, wedge
- »8 & 20 node, hexahedron
3D shell
- »8 node, quadrilateral thick shell
2D & 3D frame(beam) and truss
- »2 node, line
1D bar (axial degree of freedom only)
- »2 node, line
1D beam (bending only)
- »2 node, line
Modal vibration analysis
Modeling
- » mixed materials
- » iterative or direct solver
Boundary conditions
- » inclined constraints
- » cyclic symmetry
- » under-constrained
Results
- » mode shapes
- » natural frequencies
- » animation of mode shapes
- » text file output