Dynamic Modelling and Experimental Testing of a Dynamic Directional Amplification Mechanism for Vibration Mitigation

Abstract Purpose Inertial amplification of an oscillating mass has been considered by various researchers as a means to introduce enhanced vibration control properties dynamic system. In this paper experimental prototype novel inertial amplifier, namely the Dynamic Directional Amplification mechanism (DDA), is developed and its response subsequently evaluated. The DDA realized imposing kinematic constraints degrees freedom (DoFs) simple oscillator, hence inertia increased coupling horizontal vertical motion model. Methods concept mathematical framework amplifier are introduced then validated with measurements conducted on shaking table, located in Dynamics & Acoustics Laboratory, National Technical University Athens. Results Analysis indicates beneficial effect oscillator when compared initial structure, showcasing decrease acceleration values shift resonating frequency derived transfer functions. Conclusions key novelty lies properties, geometry easy-to-apply structure. proposed may be incorporated applications such sound isolators, acoustic panels, seismic metamaterials other devices that aim explore DDA’s properties. previously applied authors phononic locally resonant aiming bandgaps within low-frequency domain. Graphical