Welcome to the CAASE20 Multibody Dynamics Resource Page
At CAASE20 there were 3 presentations demonstating multibody dynamics involving RecurDyn Software:
Avoiding the Tipping Point: Using Quad-Physics to Optimize the Conveyance of a Fluid Product in Flexible Packaging
Brant Ross and Zachary Smith
Problem Statement – Conveyer Efficiency
- Need to understand dynamics of a fluid-filled, flexible bottle transported on a conveyer
- Goal: optimize bottle transport time.
- Faster transit time substantially reduces cost due to the large number of bottles.
- Bottle tipping negates benefit of faster transit.
- Therefore, a high-fidelity simulation is needed (quad-physics) to establish that a proper operational margin exists before the bottle tips over.
- Accurate model of fluid surge needed to understand the tendency of the bottle to tip.
- Flexible body is needed when bottles contact other bottles or guides.
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Introduction of RecurDyn and Particleworks: Cutting-edge Multiphysics Simulation Using Flexible Multibody Dynamics (MBD) and Particle-based CFD
James Crist
Gearbox lubrication analysis is typically done with prescribed motion of the gears, focusing only on the fluid behavior. This assumption can be valid but in some cases the churning losses within the gearbox will be high enough to break this assumption, a problem that may not be caught until expensive physical testing is done. By coupling the fluid and dynamics problems engineers and analysts can understand how oil fill levels will affect not only lubrication but more broadly the gearbox performance.
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Optimizing Dynamic Mechanisms Using CAE: Best Practices to Select the Design Variables and Objective Functions
Sangtae Kim
This presentation will introduce several simple but practical examples on how to optimize the design or performance of the system,such as construction equipment (a wheel loader), deployment of a solar array for a satellite, unicycle dynamics while in operation, and a hand press. All of these models will be optimized using software that is based on the progressive meta‐model method. These examples demonstrate the need for optimization and provide the ideas and insights about how to optimize practical mechanisms.
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What is RecurDyn?
RecurDyn is a Computer Aided Engineering (CAE) software focused on Flexible Multibody Dynamics (MBD), with extended multiphysics capabilities. RecurDyn combines the power of an optimized recursive solver with superior contact technology, providing best-in-class simulation performances. The effectiveness of RecurDyn really comes out when approaching large-scale multibody models, including multiple contacts and flexible bodies.
Along with the powerful solver, RecurDyn features a natural Windows-based User Interface which is intuitive and easy to use, as well as a custom application development environment which enables users to automate complicated and/or tedious tasks.
The Top 5 Advantages of RecurDyn
Pre/Post environment specialized for MBD analysis
MBD analysis requires a complete modeling environment to enable the definition of a variety of mechanical systems, including the definition of inputs and post processing (animation and plotting). RecurDyn provides a fast and efficient modeling environment. The MBD optimized UI is based on the feedback from experts and engineers in the field of MBD.
Fast, accurate and diverse contact library
Sophisticated technology is required to calculate contacts in a mechanical system. RecurDyn enables you to quickly and accurately analyze contacts in a complicated model using world-class contact algorithms. In addition, the Contact library is optimized for specific geometries such as ellipsoid, cylinder, or box.
Analysis of the motion of an assembly containing rigid and flexible bodies
MFBD technology can accurately simulate a system containing rigid and flexible bodies. It is possible to simulate nonlinear elastic cases including contact and large deformation as well as linear elastic cases. The processes of mesh creation and durability analysis are also supported within RecurDyn.
Various application toolkits
Various toolkits support complex sub-systems, including: media transport products such as printers and copiers; track assemblies on products such as construction machinery, military vehicles and recreational vehicles; machinery components such as gears, belts, and chains. The toolkits allow the user to perform modeling for a specific industry field quickly and easily and then conduct an accurate analysis of complicated mechanical systems with specialized solvers.
Scalability for multidisciplinary integrated analysis
RecurDyn provides the scalability for multidisciplinary integrated analysis such as simulation between the mechanical system and fluids through co-simulation with CFD software, control system simulation through co-simulation with Simulink, AMESIM, SimulationX (etc.), and optimal design of mechanical systems using robust optimization algorithms.