VALDYN is a multi-body dynamic and kinematic simulation package specifically developed for valvetrain and drive-system analysis and cam and spring pack design. With its detailed ‘building block’ models of engine components, it is significantly quicker to build models with VALDYN than with general-purpose dynamics tools and quicker to run because model refinement focuses on the critical aspects related to engines.

‘Building block’ structure enables modelling of virtually any valvetrain, from individual valve lines to complete systems incorporating crankshaft and camshafts
Modelling of drive systems, including gears, belts and chains
Dynamic bodies to include finite element (FE) models of guides, rockers, shafts and casings
Embedded FE solver to run the FE dynamic reduction and back-substitution to evaluate FE stresses or vibrations
Data input using expressions involving case-varying parameters
Frequency domain solver including forced-damped solution of linear models
Dynamic and kinematic analysis of valve trains
Modelling of variable valve actuation (VVA) and variable valve timing (VVT) mechanisms
Animated output in the time and frequency domains
Results plotted automatically
3D frequency-response plots
Plotting of mathematical expressions involving several outputs
Run distribution using network computing resources to speed up multi-case simulations
Links to ENGDYN and FEARCE for engine structural analysis
Co-simulation with other Realis Simulation formerly Ricardo Software and third-party programmes, such as Simulink