Technical Brief

ANCF Tire Assembly Model for Multibody System Applications

[+] Author and Article Information
Ahmed A. Shabana

Department of Mechanical Engineering,
University of Illinois at Chicago,
842 West Taylor Street,
Chicago, IL 60607-7022
e-mail: shabana@uic.edu

Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received June 6, 2014; final manuscript received September 1, 2014; published online January 21, 2015. Assoc. Editor: Ahmet S. Yigit.

J. Comput. Nonlinear Dynam 10(2), 024504 (Mar 01, 2015) (4 pages) Paper No: CND-14-1148; doi: 10.1115/1.4028479 History: Received June 06, 2014; Revised September 01, 2014; Online January 21, 2015

The aim of this paper is to propose a new numerical approach for modeling tires in multibody system (MBS) applications. In this approach, the tires, including the rigid rim, are modeled using one mesh developed using the finite element (FE) absolute nodal co-ordinate formulation (ANCF). The FE tire mesh, which allows for high spinning speed, has a constant inertia matrix and zero Coriolis and centrifugal forces. The connectivity conditions between the tire tread and rim are imposed at a preprocessing stage using linear constraint equations, thereby allowing for the elimination of dependent variables before the start of the simulation. The concept of the rim node is introduced in this paper to allow for the tire/axle assembly in MBS vehicle simulations. The rim node, which is not associated with a particular FE, is used to define the inertia of the rim, treated in this investigation as a rigid body. The procedure for evaluating the inertia coefficients associated with the rim node gradients is described. It is shown how fully parameterized ANCF beam and plate elements can be used to develop new tire geometry that captures details that cannot be captured using existing tire models. The concept of mixed ANCF FEs can also be used with both higher order fully parameterized and gradient deficient ANCF FEs to obtain a better distribution of the tire contact forces.

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Fig. 1

ANCF modeling of tapered structures

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Fig. 2

Initially curved structures

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Fig. 3

Use of spline profiles with fully parameterized ANCF elements

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Fig. 4

Simple continuum-based tire models

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Fig. 5

One ANCF-mesh-four-wheel assembly




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