Efficient and accurate modeling of rigid rods

Pan, Yongjun, Callejo, Alfonso, Bueno López, José Luis ORCID: https://orcid.org/0000-0002-0976-2234, Wehage, Roger A. and García de Jalón de la Fuente, Francisco Javier ORCID: https://orcid.org/0000-0002-7278-5535 (2016). Efficient and accurate modeling of rigid rods. "Multibody System Dynamics", v. Online ; pp. 1-20. ISSN 1384-5640. https://doi.org/10.1007/s11044-016-9520-0.


Title: Efficient and accurate modeling of rigid rods
Item Type: Article
Título de Revista/Publicación: Multibody System Dynamics
Date: 26 April 2016
ISSN: 1384-5640
Volume: Online
Freetext Keywords: Multibody dynamics, Semi-recursive Maggi’s formulation, Rod-removal technique, Polynomial extrapolation, Vehicle dynamics
Faculty: E.T.S.I. Industriales (UPM)
Department: Otro
UPM's Research Group: Computational Mechanics Group, INSIA
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Ten years ago, an original semi-recursive formulation for the dynamic simulation of large-scale multibody systems was presented by García de Jalón et al. By taking advantage of the cut-joint and rod-removal techniques through a double-step velocity transformation, this formulation proved to be remarkably efficient. The rod-removal technique was employed, primarily, to reduce the number of differential and constraint equations. As a result, inertia and external forces were applied to neighboring bodies. Those inertia forces depended on unknown accelerations, a fact that contributed to the complexity of the system inertia matrix. In search of performance improvement, this paper presents an approximation of rod-related inertia forces by using accelerations from previous time-steps. Additionally, a mass matrix partition is carried out to preserve the accuracy of the original formulation. Three extrapolation methods, namely, point, linear Lagrange and quadratic Lagrange extrapolation methods, are introduced to evaluate the unknown rod-related inertia forces. In order to assess the computational efficiency and solution accuracy of the presented approach, a general-purpose MATLAB/C/C++ simulation code is implemented. A 15-DOF, 12-rod sedan vehicle model with MacPherson strut and multi-link suspension systems is modeled, simulated and analyzed.

Funding Projects

Government of Spain
Government of Spain

More information

Item ID: 43210
DC Identifier: https://oa.upm.es/43210/
OAI Identifier: oai:oa.upm.es:43210
DOI: 10.1007/s11044-016-9520-0
Official URL: http://link.springer.com/article/10.1007/s11044-01...
Deposited by: Memoria Investigacion
Deposited on: 08 Sep 2016 15:00
Last Modified: 26 Apr 2017 22:30
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