层合圆锥壳的声辐射(英文)

Acoustic Radiation from Laminated Conical Shells

为了研究流体载荷作用下正交铺设层合圆锥壳的声辐射,详细研究了一个锥壳的声辐射理论模型。通过把层合圆锥壳划分为许多小段圆柱,处理作用在锥壳上的重质流体载荷。然而,锥壳的位移场仍然由单个锥壳的运动方程描述。锥壳的位移利用波传播法和Galerkin法求解。锥壳的远场声辐射利用两端带无限障板的全部圆柱段的声辐射相叠加。声压在波数域表示。研究了层合锥壳的结构声辐射特性。

In order to investigate acoustic radiation from cross-plied laminated conical shells, a theoretical model of acoustic radiation from conical shells is explored in detail.Fluid loadings acting on the conical shell are tackled by dividing the laminated conical shell into small cylindrical segments and the displacements of the conical shell are still described by the equations of motion for the conical shell on the basis of Reissner-Naghdi thin shell theory.The displacements of conical shell are solved by using wave propagation approach and Galerkin method.The far-field sound pressure is found in the wavenumber domain by the superposition of acoustic radiation from each cylinder with infinite circular cylindrical baffles at the two ends.Vibration and acoustic characteristics of laminated cone are studied.