Abstract The dynamics of coupled nonlinear oscillator systems is often described by the classical discrete Schrodinger equation (DNLSE). In its simplest version, DNLSE made up two terms—a nearest-neighbor hopping term and an on-site cubic term. Each terms preceded a coefficient that can take on either positive or negative sign. versions derived from corresponding equivalent Hamiltonian. result ...

This paper presents an efficient approach for the modal analysis of coupled soil-structure systems, which dynamic response is strongly influenced by embedment in soil. The methodology based on a finite element-perfectly matched layer model that allows derivation frequency-independent system matrices and computation properties system. achieved solving nonlinear eigenproblem using Compact Rationa...