20.500.12556/RUL-137580 Modal-interaction approach to the strong structural–acoustic coupling of an elastic Helmholtz resonator and an acoustic cavity containing a heavy fluid This paper focuses on the development of a method for the accurate representation of the strong structural–acoustic coupling between an elastic Helmholtz resonator, a heavy fluid and an impedance tube. The Helmholtz resonator has an elastic wall and is connected to the impedance tube, yielding a system with two acoustic cavities coupled through a neck and the fluid–structure interaction between a liquid medium and a plate. The proposed analytical formulation is based on the modal superposition method in combination with a lumped parameter model of the neck. The effect of the evanescent waves is taken into account in the form of both the inertial attached length of the neck and the terms of the evanescent pressure modes in the governing equations, which are omitted in other methods. The formulation of the evanescent pressure field is redefined to include the reflected waves, thus expanding the application to the acoustic cavity of an arbitrary shape. Strong coupling between the heavy fluid and the plate is accomplished with the implementation of the non-resonant acoustic modes. Furthermore, the improved performance of the model for moderately thick plates is achieved with the combined approach of the Mindlin–Reissner theory mode shapes and the Kirchhoff–Love theory governing equations. The proposed model is validated with FEA simulations of three different resonator configurations and compared to other applicable methods. The results demonstrate substantially increased accuracy in the predicted response of the coupled structural–acoustic system. modal-interaction fluid–structure interaction structural–acoustic coupling Mindlin plate Kirchhoff plate heavy fluid Helmholtz resonators impedance tube strukturne analize strukturna mehanika modalne povezave true false true Angleški jezik Slovenski jezik Članek v reviji 2022-06-22 14:03:34 2022-06-22 14:03:38 2022-09-15 04:15:24 0000-00-00 00:00:00 2022 0 0 17 str. Vol. 535, art. 117120 Sep. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 531/533 0022-460X 10.1016/j.jsv.2022.117120 112492035 Oblak,_Pirnat,_Boltezar_-_Modal-interaction_approach_to_the_strong_structural-acoustic_coupling_of_an_elastic_Helmholtz_resonator_and_an_acoustic_cavity_containing_a_heavy_fluid.pdf Oblak,_Pirnat,_Boltezar_-_Modal-interaction_approach_to_the_strong_structural-acoustic_coupling_of_an_elastic_Helmholtz_resonator_and_an_acoustic_cavity_containing_a_heavy_fluid.pdf 1 DA8A586700502AF1930022A052918554 f9f70a48b30438b2addd5d1cca2813ba1a622705a11a802da012cb6666a4c27f 5b5d213c-f223-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=157586 https://www.sciencedirect.com/science/article/pii/S0022460X2200325X 1 294c348e-f223-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=157585 Fakulteta za strojništvo 0 0 0