Numerical study on the response scenarios in a vibro-impact single-degree-of-freedom oscillator with two unilateral dissipative and deformable constraints

The effect of the presence of obstacles on the dynamic response of single-degree-of-freedom systems: Study of the scenarios aimed at vibration control

“…The scenarios observed experimentally were characterized and were reproduced numerically showing a good agreement with the experimental results. Further numerical investigations highlighted the existence of more complex and varied behaviors for gaps smaller than those considered in the experimental tests [72,73]. The experimental and numerical study presented in [38], compared to the others, dealt with vibration control.…”

“…This paper is part of a research work carried out by the authors and inspired by the practical problem of excessive displacements in base isolated structures. The research concerns the numerical and experimental investigation of the response of a vibro-impact single-degree-of-freedom (SDOF) system limited by two-sided deformable and dissipative obstacles (bumpers) under harmonic base excitation [38,[68][69][70][71][72][73]. The study concerns the isolation at the base of structures and equipment.…”

“…. ) exhibited by the vibro-impact system varying selected parameters [68][69][70][71][72][73]. In the theoretical-numerical study presented in [68] the authors outlined possible scenarios within the system response.…”

“…The aim of the paper is to investigate, through numerical parametric analyses, the effect of the presence of the obstacles (existing or newly added) on the response of the system under harmonic base excitation, compared to the free flight condition, that is without obstacles. Compared to previous works by the authors [72,73,75], here the study of the response scenarios which can occur by varying the bumpers' parameters (namely, position, stiffness, and damping, respectively) is directed at vibration control. In particular, the possibility to exploit the occurrence of impact with beneficial effects, by properly selecting the bumpers' parameters, is investigated.…”

Study on Dynamic Characteristics and Parameter Influence of a Kind of Bilateral Restraint Impact Vibration System

“…e study of vibration-impact dynamics is relevant to the design of dynamic performance and noise suppression of impact mechanisms and mechanical systems with motion-limiting constraints, and a large number of studies on the dynamics of connection structures have been conducted since the 1970s. Structural dynamics experiments have shown that the stiffness and damping of hinge-connected structures have nonlinear properties such as discontinuity, hysteresis, and segmental linearity [5][6][7][8][9][10][11][12]. Gritli et al found in a feedback system based on the OGY control method that in a two-parameter bifurcation diagram, the boundary collision bifurcation occurs within a bounded interval of nominal parameters [10].…”