FEEA SDK™ Features

Available analysis procedures

With Anaxsoft FEEA SDK™ you can perform the following analysis procedures:

  • Static
  • Transient implicit (Newmark, Wilson-θ Method)
  • Transient explicit (Central Difference Method)
  • Mode-Frequency (eigenvalue extraction)
  • Time history by mode superposition
  • Harmonic vibration
  • Response spectrum
  • Cross-section properties calculation (torsional/warping constants, etc)

Degrees of Freedom – Coordinate Systems

It handles in a very efficient manner the degrees of freedom assigned at nodes, and the skew coordinate systems assigned at the degrees of freedom. Uses up to six degrees of freedom per node: three translational and three rotational degrees of freedom. Each node's degrees of freedom may be assigned to skew coordinate systems. Specifically, with our engine you can:

  • Use master boundary condition codes (master degrees of freedom)
  • Have variable (1 to 6) degrees of freedom per node
  • Support unlimited number of coordinate systems
  • Define nodes in coordinate systems other than the global Cartesian
  • Assign skew coordinate system to nodes

Material models

The following material models are supported:

  • Elastic-isotropic
  • Elastic-orthotropic

Element library – Element formulations

It offers a rich set of elements/element formulations. The following element formulations are available:

  • 2-node truss element
  • 2-node prismatic beam element (includes shearing deformation effects – Timoshenko beam)
  • Variable 3- to 6-node 2-D solid isoparametric triangular element
  • Variable 4- to 9-node 2-D solid isoparametric quadrilateral element
  • Variable 4- to 10-node 3-D solid isoparametric tetrahedral element
  • Variable 8- to 20-node or 21- or 27-node 3-D solid isoparametric hexahedral element
  • Single degree of freedom spring element
  • Single degree of freedom mass element
  • Single degree of freedom damper element
  • Rigid link element (between two nodes)
  • Rigid body (variable node element)

Two-dimensional elements kinematic assumptions

The following kinematic assumptions, when dealing with two-dimensional problems, are handled:

  • Plane stress
  • Plane strain
  • Axisymmetric

Boundary conditions

The following boundary conditions are available:

  • Fixity boundary conditions
  • Prescribed displacements at specified degrees of freedom
  • Single-point constraint equations
  • Multi-point constraint equations
  • Initial conditions (displacements/velocities/accelerations)

Applied Loading

The following loads are available:

  • Force and moment load applied at node
  • Pressure load applied at 2-D solid element edges
  • Pressure load applied at 3-D solid element surfaces
  • Pressure load applied at plate/shell element surfaces
  • Mass-proportional load to model gravity loading or ground acceleration
  • Concentrated force/moment applied at truss/beam element
  • Distributed load (applied at truss/beam element)
  • Trapezoidal load applied partially at beam element
  • Fixed-end forces to simulate arbitrary load applied at beam element
  • Prescribed temperature load

Mass Formulation

It supports the following mass-matrix formulations:

  • Lumped
  • Consistent


The following damping options are available:

  • Modal damping
  • Reyleigh damping

Additional Capabilities

Anaxsoft FEEA SDK has unique capabillities. Specifically, for linear analysis, it allows:

  • Multiple analysis procedures in a single computer run
  • Results to be obtained for selected nodes/elements

For example, in a single run, you can perform any number of linear static or dynamic analyses.

No restrictions

Anaxsoft FEEA SDK does not impose any restrictions, other than those imposed by computer's physical memory. It has been successfully tested with models having 100K-200K degrees of freedom. You can have unlimited entities, like:

  • Nodes, elements, element groups, etc.
  • Loading cases/loading case combinations (linear static analysis)
  • Time functions
  • Time history loading cases (each associated with a time function)
  • Response spectra