辐射声场, 弹性支承, 封闭声腔, 耦合, 连接

A model of sound radiated from two connected cylindrical enclosures with a wide variety of boundary conditions was deduced by using Hamiltonian function and Rayleigh-Ritz method herein. By means of artifical springs along the connected points of two flexible panels, this model allowed the consideration of structural joint conditions.A general formulation considering the full coupling between the subsystems(plates,shell and cavities) was developed. Two main issues were reached. One is that the sound radiation of the enclosure structure is governed by the substructure excited directly, the other is that the rotational stiffness of connected points has less influence on the sound radiation than the translational stiffness has. The contribution and highlight of this paper are that it provides some supports in engineering theoretically.

sound radiation, elastic supported, enclosure, coupling;connection