Symmetric Single-Sided Vibro-Impact Nonlinear Energy Sink for Shock Response Suppression of a Cantilever Beam: An Experimental Demonstration

This chapter presents an in-depth experimental investigation into the effectiveness of a symmetric single-sided vibro-impact nonlinear energy sink (SSSVI NES) in suppressing shock responses in cantilever beams. The study begins by introducing the background and significance of vibration control in structural engineering, particularly in the context of tall buildings subjected to extreme loads. The chapter then provides a detailed mathematical model of the cantilever beam coupled with the SSSVI NES, including the equations of motion and impact dynamics. The experimental setup is meticulously described, featuring a cantilever beam equipped with piezoelectric accelerometers and a precisely designed SSSVI NES. The experimental results are compared with simulation data, demonstrating the superior performance of the SSSVI NES in rapidly decaying the beam's response under impulse loads. The chapter also explores the nonlinear dynamics of the system, highlighting the energy transfer mechanisms and frequency shifts induced by the NES. The wavelet and Fourier spectra analyses reveal the complex interactions between the beam and the NES, underscoring the device's ability to dissipate energy across multiple modes. The conclusions drawn from the experimental data affirm the effectiveness of the SSSVI NES in enhancing the structural response suppression, paving the way for its potential application in various engineering fields.