Worked Out Problem 11: A Linear Elasticity Application on a Beam Bridge

In this chapter, we consider a vector elliptic PDE modeling a linear elasticity problem for bridge designing in a two-dimensional and geometrically parametrized domain. The aim is to obtain efficient evaluations of the vector displacement field and the output of interest, defined as the integrated vertical displacement over the loaded boundary. The solution is approximated using reduced order modeling techniques based on the Greedy algorithm and the Successive Constraint Method. The problem is described by presenting the physical domain, the goal, the parametrization, the boundary conditions, the governing PDE, and the corresponding weak formulation with its affine decomposition. Numerical results show the performance of the reduced approach with respect to the high-fidelity discretization, the quantity of interest, and the speedup. We provide the links to the source code, to the Jupyter notebook, and to the web-server ARGOS.