Harbir Antil

ALESQP: An augmented Lagrangian equality-constrained SQP method for optimization with general constraints

  • Harbir Antil
  • Drew P. Kouri
  • Denis Ridzal
    • Categories Constrained Nonlinear Optimization, Infinite Dimensional Optimization, Nonlinear Optimization

    We present a new algorithm for infinite-dimensional optimization with general constraints, called ALESQP. In short, ALESQP is an augmented Lagrangian method that penalizes inequality constraints and solves equality-constrained nonlinear optimization subproblems at every iteration. The subproblems are solved using a matrix-free trust-region sequential quadratic programming (SQP) method that takes advantage of iterative, i.e., inexact linear … Read more

    The Strip Method for Shape Derivatives

  • Harbir Antil
  • Drew P. Kouri
  • Sean Hardesty
  • Denis Ridzal
    • Categories Infinite Dimensional Optimization, Multidisciplinary Design Optimization, Optimization of Systems modeled by PDEs Tags , , , ,

    A major challenge in shape optimization is the coupling of finite element method (FEM) codes in a way that facilitates efficient computation of shape derivatives. This is particularly difficult with multiphysics problems involving legacy codes, where the costs of implementing and maintaining shape derivative capabilities are prohibitive. The volume and boundary methods are two approaches … Read more