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VALDYN is a multi-body dynamics simulation package which has been specifically developed for valvetrain and drive system analyses. With its detailed “building block” models of engine components, VALDYN models are significantly quicker to build than many of the general purpose dynamics tools and quicker to run because model refinement is focussed on the critical aspects related to engine dynamics.
Features
- “Building block” structure allows modelling of virtually any valvetrain, from individual valvelines to complete systems incorporating crankshaft and camshaft
- Modelling of drive systems, including gears, belts and chains
- Frequency domain solver
- Import of finite element models as a dynamic body
- Dynamic and kinematic analysis of valvetrains
- Modelling of VVT and VVA mechanisms
- Animated output in the time and modal domains
- Automatic plotting of results
- Parametric studies
- Link to ENGDYN for engine structural analysis
Capabilities and Applications
- Timing belt and auxiliary belt analysis
- Timing chain analysis for most types of chain
- 2D and 3D gear analysis used for dynamic gear load predictions, vibro-acoustic optimisation and durability studies
- System natural frequencies for linear and non-linear models
- Complex models of vibration
- Analysis of novel mechanisms
- Detailed valve spring model
- Most valvetrain types can be modelled for valvetrain analysis
- Shaft bending and torsional vibration analysis
- Design and optimisation of timing drives and auxiliary drives for improved durability and reduced NVH
- Investigation of phenomena such as valve acceleration, valve bounce seating velocity, coil clash, spring surge and torsional vibration
- Complete engine mechanical system analysis
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