4 April 2012 Nonlinear modeling of the vehicle/structure interaction on a skewed highway bridge using an iterative uncoupled approach
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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.
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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, "Nonlinear modeling of the vehicle/structure interaction on a skewed highway bridge using an iterative uncoupled approach", 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; https://doi.org/10.1117/12.916187

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