Experimental Identification Technique of Nonlinear Beams in Time Domain

摘要: In previous papers, the authors proposed a new experimental identification technique applicable to elastic structures. The is based on principle of harmonic balance and can be classified as frequency domain technique. requires excitation force periodic. This is, in some cases, restriction. So another free from this restriction use. paper, first step for developing such techniques, beams proposed. time technique, two variations which are method usual least-squares method. second solving minimization problem with constraints. latter usually yields better results. But method, an iteration procedure used initial values parameters. To obtain values, used. both methods useful. Finally, applicability confirmed by numerical simulation well experiments.