Study on the effect of multiple NES coupling forms on TET

In order to enhance the robustness and the energy range of efficiency of targeted energy transfer (TET) phenomena in acoustics, we discuss in this paper about the use of multiple nonlinear energy sinks (NES) placed in parallel and series. In this paper, two degrees of freedom NES and a linear primary oscillator coupled system are used to study the effect of coupling form on TET efficiency. This paper mainly studies the mechanical properties of multi-degree of freedom systems under harmonic load. System vibration response and stability are analyzed applied harmonic balance method and numerical simulation. Analytical results show that the TET efficiency is more higher coupled in parallel than in series used the same NES.