PISDYN - Finite Element (FE) modelling| Products

PISDYN incorporates an advanced interface that enables the user to use FE models to calculate mass and stiffness metrics for dynamic and compliant analysis. It can also be used to calculate deformations due to thermal, pressure and inertia loads. Any combination of model level can be chosen for the piston or liner-side assemblies.

With its internal FE solver, PISDYN has the capability to perform all required analyses. Alternatively, if the user prefers, appropriate analysis decks for major third-party solvers (e.g. Abaqus and Nastran) can also be set up.

The post-solution, PISDYN FE interface can also apply calculated forces to component FE models providing boundary conditions for FE stress analyses.

Key features

Interactive 3D graphical user interface (RAPID GUI)
Automatic selection of sets for loading
Vectorized sparse solver (VSS) static (Guyan) and dynamic (component mode synthesis (CMS)) reduction
Thermal, inertial and gas pressure deformations
Temperature-dependent material properties
Complete piston and liner (or engine block) models with optional half model
Inertia relief for static models
Built-in translators from commercially available FE packages
Pressure loading of cylinder head
Back-substitution of results for complete piston/liner FE analyses
Piston and liner dynamic models
Mass and damping
User-defined modal damping characteristic
Critical damping ratio against frequency
Critical damping applied to each mode
User selects the number of dynamic modes
Improved vibration analysis for piston-slap prediction