The behaviour of structures subject to time-varying loads can be extremely
difficult to estimate without computer simulation. LISA generates an animation
of the induced vibrations and changing stresses. Both modal and explicit time
stepping can be used.
Dynamic response elements
2D membrane
- »3 node, constant strain triangle
- »6 node, linear strain triangle
- »4 node, bilinear quadrilateral
- »8 node, quadratic quadrilateral
3D solid
- »4 node, tetrahedron
- »8 node, hexahedron
Axisymmetric solid
- »3 node, constant strain triangle
- »6 node, linear strain triangle
- »4 node, bilinear quadrilateral
- »8 node, quadratic quadrilateral
- »9 node, quadrilateral
2D & 3D truss
- »2 node, line
1D bar (axial degree of freedom only)
- »2 node, line
Dynamic response analysis
Modeling
- » central difference, Houbolt, Wilson or Newmark solvers
- » mixed materials
- » initial displacements, velocities & accelerations
Boundary conditions
- » self-weight
- » time dependant point loads
- » time dependant pressure loads
Results
- » stiffness matrix
- » color contour plot with or without nodal averaging
- » deformed view
- » text file output
- » cut-away tool to view inside of the model