VALDYN

VALDYN

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.  

Key features

  •  ‘Building block’ structure enables modelling of virtually any valvetrain, from individual valvelines 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 valvetrains
  • 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 Ricardo and third-party programmes, such as Simulink
Applications

Applications

VALDYN - Finite Element (FE) components

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Relevant resources

Dynamic analysis of a valvetrain system and integrating for 3D structural analysis

Dynamic analysis of a valvetrain system and integrating for 3D structural analysis

Slide set
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Valvetrain friction - modeling, analysis and measurement of a high performance engine valvetrain system

Valvetrain friction - modeling, analysis and measurement of a high performance engine valvetrain system

Slide set
Download resource

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