浸没圆柱薄壳远场辐射声场的理论预估

Theoretical Prediction of Sound Radiation at Far Field for a Submerged Cylindrical Shell

以薄壳振动理论和结构－流体声振耦合理论为基础，运用边界积分方程建立了浸没在无界重质流体中两端有障圆柱形薄壳的强迫振动方程．用Ｆｏｕｒｉｅｒ变换方法给出了壳体位移的理论表达式，并对浸没薄壳的远场辐射声场进行了理论预估．研究结果对该类壳体的噪声和振动控制提供了理论基础．

Boundary integral equations are used to solve the forced vibration problem of a baffled cylindrical thin elastic shell of finite length immersed in a heavy fluid of infinite extent. Coupling theory of sound and vibration is used. Fourier transform is applied to obtain the shell’s vibration displacement and sound pressure expressions at far field. Study results provide the theoretical basis for controlling noise and vibration of this kind of shell.