Multibody dynamics is the prediction of the motion of groups of interconnected bodies that have forces acting on them. The result of a multibody dynamics simulation is the motion of the bodies and the various interaction forces acting on and between the bodies. Multibody dynamics, as opposed to Multi-Flexible-Body Dynamics (MFBD), is the simulation of groups of bodies idealized as being perfectly rigid.
Multibody dynamics simulation software predicts the motion and the interaction forces by automatically formulating differential equations to describe the motion of a system of bodies and then solving them numerically.
RecurDyn is the world’s leading multibody dynamics simulation software. It provides the most robust, easiest to use, and most complete solution for multibody dynamics simulation. It provides the fastest solver and the most extensive set of features of any multibody dynamics software. RecurDyn contains the most advanced technologies commercially available in a multibody dynamics simulation solution.
Multibody Dynamics Technologies in RecurDyn: Advanced numerical methods. The RecurDyn solver contains a collection of cutting-edge, world leading numerical methods that help it achieve its incredible performance.
Typical process to use Multibody Dynamics and Multi Flexible Body Dynamics
MBD: Multibody Dynamics (or Multi-Body Dynamics)
MFBD Multi Flexible Body Dynamics
MBS: Multibody Simulation. MBD is often called MBS.
Process of MBD analysis
Differential equation solvers for Multibody Dynamics Simulation
RecurDyn contains a number of differential equation solvers, known as “integrators”, for solving the system of equations that describe the motion of the multibody systems. These equations are known as Differential Algebraic Equations (DAEs), a combination of differential equations that describe motion and algebraic equations that encapsulate joint constraints. DAEs are known to be complex to solve. RecurDyn’s integrators are robust and fast, providing rapid calculation and reliable solutions. RecurDyn’s primary multibody dynamics integrator is the Generalized-Alpha method. It also contains other, specialized solvers for various other problem types, such as for modeling tracked vehicles, such as excavators and military battle tanks.
RecurDyn’s linear solver is the best in class. It is a multi-frontal, direct, sparse linear solver optimized for the constrained dynamics equations found in multibody dynamics. This linear solver makes maximum use of today’s multi-core CPU technology.
World-leading contact formulation
Contact is extremely important for multibody dynamics simulations. In many mechanical systems, bodies interact with each other through bodies making contact with other bodies. Furthermore, contact is also mathematically and numerically very complex and difficult to model for most software. However, RecurDyn provides highly advanced, robust, and easy-to-use contact formulations. RecurDyn’s contact modeling allows for very rapid simulation and provides very dependable results for various multibody dynamics problems.
Advanced, Integrated, Intuitive GUI for Multibody dynamics
RecurDyn’s GUI is very powerful, yet it is easy to use because of its intuitive design. It contains a completely integrated environment for model development, simulation, and analysis of results. Pre-processing for model creation and parameter definition and post-processing for analyzing the results is integrated directly into the GUI. Bodies defined in industrial standard CAD formats can be imported to define the properties and the geometry of bodies. A wide range of customization options also exist in the GUI to improve productivity by automating common tasks.
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