Some comments on the nonlinear dynamics of a portal frame under base excitation

Issue title: Nonlinear vibrations in elastic structures: Dynamics and control

Article type: Research Article

Authors: de Paula, Aline Souza | Balthazar, José Manoel | Felix, Jorge Luis Palacios

Affiliations: Department of Mechanical Engineering, Universidade de Brasília, Brasília, DF, Brazil | Departamento de Estatística, Matemática Aplicada e Computação-UNESP, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista, Rio Claro, SP, Brasil | Depto de Engenharias, Universidade Federal do Pampa, Campus Alegrete, RS, Brasil

Note: [] Corresponding author: Aline Souza de Paula, Department of Mechanical Engineering, Universidade de Brasília, 70.910.900, Brasília, DF, Brazil. E-mail: alinedepaula@unb.br

Abstract: This paper presents a nonlinear dynamic analysis of a flexible portal frame subjected to support excitation, which is provided by an electro-dynamical shaker. The main goal of this study is to investigate the dynamic interactions between a flexible portal frame and a nonlinear electrical support excitation. The numerical analysis shows a complex behavior of the system, which can be observed by phase spaces, Poincaré sections and bifurcation diagrams.

Keywords: Electro-dynamical shaker, flexible portal frame, nonlinear dynamics

DOI: 10.3233/SAV-130824

Journal: Shock and Vibration, vol. 20, no. 6, pp. 1093-1101, 2013