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Modelling and simulation of coupled multibody systems and granular media using the non-smooth contact dynamics approach

机译：使用非平滑接触动力学方法的耦合多体系和粒度介质的建模与仿真

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Multibody models are often coupled with other domains in order to enlarge the scope of computer-based analysis. In particular, modeling multibody systems (MBSs) in interaction with granular media is of great interest for industrial process such as railway track maintenance, handling of aggregates, etc. This paper presents a strong coupling methodology for unifying a multibody formalism using relative coordinates and a discrete element method based on non-smooth contact dynamics (NSCD). Both tree-like and closed-loop MBSs are considered. For the latter, the coordinate partitioning techniques is applied in the NSCD framework. The proposed approach is applied on the slider-crank mechanism benchmark. Results are in very good agreement with results obtained with other techniques from the literature. Finally, a multibody model of a tamping machine is coupled to a discrete element model of railway ballast in order to analyse efficiency of track maintenance. This application demonstrates that the dynamics of the machine must be taken into account so as to estimate the performance of the maintenance process correctly.
机译：多体型模型通常与其他域耦合，以扩大基于计算机的分析的范围。特别地，在与粒状介质的相互作用中建模的多体体系（MBS）对工业过程具有很大的兴趣，例如铁路轨道维护，聚集体处理等。本文提出了一种强大的耦合方法，用于使用相对坐标和A统一多体形形式主义基于非平滑接触动力学（NSCD）的离散元件方法。考虑树状和闭环MBS。对于后者，在NSCD框架中应用坐标分区技术。所提出的方法适用于滑块曲柄机构基准。结果与来自文献中的其他技术获得的结果非常好。最后，夯实机的多体模型耦合到铁路镇流器的离散元件模型，以分析轨道维护的效率。此应用程序表明必须考虑机器的动态，以便正确估计维护过程的性能。

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