On the Topological Derivative in Shape Optimization
SIAM Journal on Control and Optimization
On the large time behavior of solutions of Hamilton—Jacobi equations
SIAM Journal on Mathematical Analysis
Shapes and geometries: analysis, differential calculus, and optimization
Shapes and geometries: analysis, differential calculus, and optimization
The Topological Asymptotic for PDE Systems: The Elasticity Case
SIAM Journal on Control and Optimization
Structural optimization using sensitivity analysis and a level-set method
Journal of Computational Physics
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We consider in this paper the homogeneous 1-D wave equation defined on 驴驴驴. Using the Hilbert Uniqueness Method, one may define, for each subset 驴驴驴, the exact control v 驴 of minimal L 2(驴脳(0,T))-norm which drives to rest the system at a time T0 large enough. We address the question of the optimal position of 驴 which minimizes the functional $J:\omega \rightarrow \|v_{\omega}\|_{L^{2}(\omega \times (0,T))}$ . We express the shape derivative of J as an integral on 驴 驴脳(0,T) independently of any adjoint solution. This expression leads to a descent direction for J and permits to define a gradient algorithm efficiently initialized by the topological derivative associated with J. The numerical approximation of the problem is discussed and numerical experiments are presented in the framework of the level set approach. We also investigate the well-posedness of the problem by considering a relaxed formulation.