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Proceedings Paper

Nonlinear modeling of the vehicle/structure interaction on a skewed highway bridge using an iterative uncoupled approach
Author(s): Amir A. Mosavi; Mainak Mitra; Gwendolyn W. van der Linden; Tim Gordon; Hassan Sedarat; Abbas Emami-Naeini; Vince Jacob; Alex Krimotat; Mark Gilbert; Jerome Lynch
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Paper Abstract

Vehicle/structure interaction is extremely important in determining the structural performance of highway bridges. However, an accurate prediction of the generated vibrations and forces requires a high-fidelity nonlinear 3D model which is sufficiently representative of the actual vehicle and bridge structure. In spite of all the computational advancements, there are still many technical difficulties to obtain a converging solution from a coupled highly nonlinear and highly damped vehicle/structure models. This paper presents an iterative uncoupled approach to obtain an accurate estimation of the vehicle/structure interaction. The multi-axle vehicle is simulated using a nonlinear 3D multibody dynamics model. The bridge model also contains several nonlinear components to accurately model the bridge behavior. The vehicle/bridge interaction results are obtained through an iterative solution by exchanging the outputs of two uncoupled nonlinear models. A convergence criterion is selected to obtain a reliable solution after several of these iterations. Finally, a reduced-order model of the bridge is developed using a state-space model. The linear reduced-order model of the bridge is coupled with the nonlinear vehicle model to improve the solution time of the analysis. The results are in a very good agreement with the iterative uncoupled approach.

Paper Details

Date Published: 4 April 2012
PDF: 13 pages
Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 834728 (4 April 2012); doi: 10.1117/12.916187
Show Author Affiliations
Amir A. Mosavi, SC Solutions, Inc. (United States)
Mainak Mitra, Univ. of Michigan (United States)
Gwendolyn W. van der Linden, SC Solutions, Inc. (United States)
Tim Gordon, Univ. of Michigan (United States)
Hassan Sedarat, SC Solutions, Inc. (United States)
Abbas Emami-Naeini, SC Solutions, Inc. (United States)
Vince Jacob, SC Solutions, Inc. (United States)
Alex Krimotat, SC Solutions, Inc. (United States)
Mark Gilbert, Univ. of Michigan (United States)
Jerome Lynch, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 8347:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012
Andrew L. Gyekenyesi, Editor(s)

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