Wave absorption control of a lumped mass system using a dynamic absorber with variable stiffness property

Severe vibration may occur in structures such as high-rise buildings and bridges according to wind seismic excitations, large space due their lightweight flexible constitution. Generally, when several modes are simultaneously excited, application of the model-based control strategies become difficult. In this study, we propose a wave absorption method for reducing vibrations multi-degree-of-freedom systems semi-actively using magnetorheological elastomer-based dynamic absorber. The stiffness absorber is changeable applied magnetic field strength. value tuned adaptively so that mechanical impedance at boundary meets an absorptive requirement. Analytical investigation clarified relationship between excitation frequency could eliminate reflection from maintain no resonant state system. Based on condition, numerical simulation experiment were performed. proposed be used with scheme was found significantly reduce structural within variable range.