Development of a Musculotendon Model Within the Framework of Multibody Systems Dynamics

2016 ◽  
pp. 213-237
Author(s):  
Ana R. Oliveira ◽  
Sérgio B. Gonçalves ◽  
Mamede de Carvalho ◽  
Miguel T. Silva
Keyword(s):  
Multibody Systems ◽  
Systems Dynamics

Coupled finite element and multibody systems dynamics modelling for the investigation of the bridge approach problem

2019 ◽  
Vol 233 (10) ◽  
pp. 1097-1111 ◽  
Author(s):  
AI El-Ghandour ◽  
CD Foster
Keyword(s):  
Finite Element ◽  
Multibody Systems ◽  
Sudden Change ◽  
Three Dimensional ◽  
Systems Dynamics ◽  
The Finite Element Method ◽  
Three Dimensional Model ◽  
Bridge Approach ◽  
Railroad System ◽  
Approach Problem

Railways are the most common mode of transportation for both people and cargo due to its advantages in economy, safety, and comfort. The finite element method has been broadly used for more than three decades to model the different components of the railroad system such as rails, sleepers (cross ties), and substructure and has been used to investigate a variety of problems associated with rail mechanics. Different multibody systems dynamics software programs have also been developed to investigate the dynamic performance and contact behaviour between the rails and the wheels and to determine the contact forces. In this work, a full three-dimensional model that couples both the finite element method and the multibody systems dynamics has been used to study the railroad system. The main focus of this study is to model the bridge approach problem under dynamic load. The bridge approach problem arises from the sudden change in the foundation's stiffness under the rails at the bridge entry and exit, leading to high levels of stress and settlement that can also cause further problems over time. The effect of using a concrete slab at the bridge entry is also investigated in this study, using two slab designs: rectangular and inclined. The results show the effectiveness of the three-dimensional model and slab implementation on the forces and the vertical deformation, especially the inclined slab that applies a gradual change in the stiffness rather than a sudden change.

scholarly journals Nonlinear phenomena of contact in multibody systems dynamics: a review

2021 ◽  
Author(s):  
Eduardo Corral ◽  
Raúl Gismeros Moreno ◽  
M. J. Gómez García ◽  
Cristina Castejón
Keyword(s):  
Multibody Systems ◽  
Coefficient Of Restitution ◽  
Contact Model ◽  
Nonlinear Phenomena ◽  
Systems Dynamics ◽  
Distinctive Features ◽  
Contact Models ◽  
Impact Events

AbstractIn the present work, an introduction to the contact phenomena in multibody systems is made. The different existing approaches are described, together with their most distinctive features. Then, the term of coefficient of restitution is emphasized as a tool to characterize impact events and the algorithm for calculating the relative indentation between two convex-shaped bodies is developed. Subsequently, the main penalty contact models developed in the last decades are presented and developed, analysing their advantages and drawbacks, as well as their respective applications. Furthermore, some models with specific peculiarities that could be useful to the reader are included. The aim of this work is to provide a resource to the novice researcher in the field to facilitate the choice of the appropriate contact model for their work.

IMITA-Tool for Simulation of Multibody Systems Dynamics

2021 ◽  
pp. 215-218
Author(s):  
Egon Lavendel ◽  
Alexander Janushevskis
Keyword(s):  
Multibody Systems ◽  
Systems Dynamics
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