Introduction

turbine LISA is a user-friendly finite element analysis package with an integrated modeler, multi-threaded solver and graphical post-processor.

It has a broad range of functionality to test the design integrity of custom machines/devices, structures, heat exchangers, HVAC, etc.

LISA has an easy to use interface, is backed by free technical support and has an extensively documented user manual.

Car Frame Newcomers to the FE method will find LISA an indispensible tool, which is why universities in the U.S, U.K, Canada, Italy, Netherlands, Spain, Poland & Japan use LISA for their introductory courses, despite having ANSYS seats.

LISA is priced to be affordable to individuals and not just companies.

LISA is used in industries across the world by

Static

Models can incorporate solids, shells, membranes, space frames, pin-jointed trusses and anisotropic materials including laminated composites. Pressures, point forces, thermal expansion, gravity, centrifugal force and fixed displacements can be applied. Nodes can be constrained on inclined planes and coupled to define rigid connections. Cyclic and linear periodic symmetry can easily be exploited to simplify repetitive structures. Various stresses are computed to predict failure locations and safety factors.

Modal Vibration

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.

Dynamic Response

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.

Thermal

Time history of heating and cooling can be computed using effects such as convection, radiation, constant heat sources and temperature dependant material properties. Fin elements can easily model heatsinks, wires and beams with the aid of predefined or custom cross-sections. Steady state temperature and heat flux distributions can be solved more quickly.

Fluid

LISA can model 3D inviscid flows, general 2D flow according to the Navier-Stokes equations, seepage through porous materials, hydrodynamic lubrication of bearings and Non-Newtonian fluids such as plastic melt and food. It can also find seiche or sloshing modes of liquids in tanks and enclosed basins.

Buckling

Linear eigenvalue buckling analysis can be used to find the critical loads and deformed shapes of 3D solid and 2D frame structures which exhibit bifurcation buckling.

Magnetic

LISA will compute the 2D magnetic fields (B and H) generated by electric currents. It also has a solver to find resonances of electromagnetic waves in a wave guide.

DC Current Flow

Voltage and current distribution within solid conductors. Lumped resistors, voltage sources and current sources can all be combined with arbitrary geometries. Resistive heat generation and electric fields are also computed.

Acoustic

Resonances in rooms and other closed cavities can be found. This is useful to ensure mechanical vibrations don't set up strong standing waves in vehicle cabins, etc.

Electrostatic

Electric field densities and electric flux intensities across a potential difference can be determined. This is needed for capacitor design, etc.