This work investigates the formation of transverse stop-bands in fluid-filled periodic structures with local resonances induced by liquid dampers. The study investigates the efficiency of periodic liquid dampers in reducing low-frequency transverse vibrations through the cou- pling of local resonances with periodicity effects. Vibration attenuation predictions are made using a simplified model of the system’s unit cell, obtained by applying the Dynamic Stiffness Matrix (DSM) method. This approach enables explicit computation of dispersion characteris- tics and stop-bands, emphasising the impact of key parameters on transverse wave propagation. The simplified model of the system’s dynamics is presented, offering a useful tool for preliminary parametric analysis of low-frequency stop-bands formation and vibration attenuation. Further- more, this preliminary model can serve as a reference for more complex analyses, facilitating the study of the optimisation of the system to obtain wider stop-bands. An illustrative case is presented, showing the effect of periodic liquid dampers on transverse wave attenuation.
WAVE PROPAGATION AND SLOSHING INTERACTIONS IN STRUCTURES WITH PERIODIC LIQUID DAMPERS / Dall’Olio1, Filippo; Manconi, Elisabetta; Ghazizadeh Ahsaei, A.; Rustighi, Emiliano. - 146:(2025), pp. 1-13. ( COMPDYN 2025 10th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Rhodes Island, Greece 15-–18 June 2025).
WAVE PROPAGATION AND SLOSHING INTERACTIONS IN STRUCTURES WITH PERIODIC LIQUID DAMPERS
A. Ghazizadeh Ahsaei;
2025-01-01
Abstract
This work investigates the formation of transverse stop-bands in fluid-filled periodic structures with local resonances induced by liquid dampers. The study investigates the efficiency of periodic liquid dampers in reducing low-frequency transverse vibrations through the cou- pling of local resonances with periodicity effects. Vibration attenuation predictions are made using a simplified model of the system’s unit cell, obtained by applying the Dynamic Stiffness Matrix (DSM) method. This approach enables explicit computation of dispersion characteris- tics and stop-bands, emphasising the impact of key parameters on transverse wave propagation. The simplified model of the system’s dynamics is presented, offering a useful tool for preliminary parametric analysis of low-frequency stop-bands formation and vibration attenuation. Further- more, this preliminary model can serve as a reference for more complex analyses, facilitating the study of the optimisation of the system to obtain wider stop-bands. An illustrative case is presented, showing the effect of periodic liquid dampers on transverse wave attenuation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
