Author(s)

N.S. Jovanovic, D.E. Keyes, K. Gum Prasad & J.H. Kane

Abstract

A drop tolerance preconditioning strategy for accelerating the convergence of iterative methods is tested on algebraic equations resulting from bound- ary element analysis of continuum structural and thermal response prob- lems. The preconditioned are analogs of the drop tolerance incomplete LU (ILU) preconditioned commonly employed with Krylov methods in the solution of sparse linear systems. In all of the problems considered, pre- conditioned Krylov iteration is more efficient than a dense direct method, with an advantage that improves with problem size. In some of the prob- lems, the optimal drop tolerance ILU (DTILU) preconditioning keeps more nonzeros t

Keywords