6533b7dafe1ef96bd126f25f

RESEARCH PRODUCT

An Improved Hierarchical ACA Technique for Sound Absorbent Materials

A. BrancatiMohammad AliabadiA. Milazzo

subject

hierarchical BEMAcoustics Large-scale SimulationSettore ING-IND/04 - Costruzioni E Strutture Aerospaziali

description

This paper presents an improved adaptive cross approximation (ACA) approach developed in conjunction with the Hierarchical format matrix and the GMRES solver. A novel scheme to generate the cluster tree (based upon preliminary considerations of the prescribed boundary conditions) and an improved ACA algorithm (approximating the system matrix for mixed Robin conditions) are described. The asymptotic smoothness property of a kernel generated by a linear combination of two asymptotic smooth kernels is demonstrated. Numerical results show the new approach to be up to 50% faster than the conventional ACA approach.

yearjournalcountryeditionlanguage
2011-01-01
http://hdl.handle.net/10447/63666