Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Flexible rail representation on multibody dynamics using a quadratic finite element based on the absolute nodal coordinate formulation
Submission Author:
Leonardo Bartalini Baruffaldi , SP , Brazil
Co-Authors:
Leonardo Bartalini Baruffaldi, Auteliano Antunes dos Santos Junior, Marco Bittencourt
Presenter: Leonardo Bartalini Baruffaldi
doi://10.26678/ABCM.MECSOL2022.MSL22-0124
Abstract
The design and analysis of railway vehicles has, for many years now, relied on multibody system dynamics (MBD) modelling both to speed up the design cycle and reduce prototyping and instrumentation costs. The use of flexible rails within these models, however, is a problem that is not completely solved yet: early approaches used concentrated parameters to represent rail, sleepers, ballast, and other underrail elements; current state of the art commercial software rely on modal reduction extracted from finite element models; and recent advances walk towards finite elements integrated to the MBD solver or towards co-simulation between MBD and FEA. Based on the already established absolute nodal coordinate approach with the continuum mechanics formulation and selective integration, this work presents a quadratic, three-dimensional beam element that can be used to effectively model rails. The elements are implemented on a MBD code and integrated using kinematic constraints and the augmented lagrangian technique, yielding a differential algebraic equations system.
Keywords
railway engineering, Flexible Multibody Dynamics, Finite Element Method, flexible rail
