Reproduction of Intrinsic Localized Modes by Prototype Experiments of Nonlinear Magnetic Rotary Springs

Abstract

　The vibration mode called Intrinsic Localized Mode (ILM) is a phenomenon in which the vibration energy is concentrated at a localized point, which can be observed in a multi-massive dynamic vibration system connected by nonlinear springs. It is also possible to propagate the concentrated vibration energy to the adjacent masses under special conditions. Although ILM is a phenomenon with high engineering applicability from the viewpoint of vibration energy control, there are still few application research examples due to the low reproducibility of nonlinear springs. Therefore, we focused on the magnetic nonlinearity and proposed a nonlinear magnetic rotation spring for ILM excitation. In this paper, we present a prototype of the proposed magnetic spring and verify that the proposed model can excite the ILM.