水中弹性球壳的共振声辐射理论  

Resonance radiation theory of a submerged elastic spherical shell

作　　者：汤渭霖[1] 范军[1] 

机构地区：[1]上海交通大学振动,冲击,噪声国家重点实验室,上海200030

出　　处：《声学学报》2000年第4期308-312,共5页Acta Acustica

基　　金：国家自然科学基金

摘　　要：为了深入认识水中结构的声辐射机理，木文提出一个称为共振辐射理论（ResonanceRadiationTheory－RRT）的新理论。它是由共振散射理论（ResonanceScatterinyTheory－RST）推广得到的。对于一个在内壁简谐力激励下的水中弹性球壳，从经典的Rayleish简正级数解出发导出了共振辐射公式。水中薄钢球壳的辐射分波的数值计算表明，辐射形态函数与散射形态函数相似。由复共振极点参数按照共振辐射公式合成的辐射声功率曲线与严格理论的计算结果符合良好。A new theory, named the Resonance Radiation Theory (RRT), is presented in order to deeper understalldingthe mechanisms of sound radiation by submerged structure. It is an extension of the Resonance Scattering Theory (RST).For a submerged elastic spherical shell excited by internal harmonic force the resonance radiation formulae have beenderived from classical Rayleigh normal mode solution. Numerical calculation for a thin steel shell shows that the radiationform function is similar to the scattering form function. The radiation sound power synthesized by the resonance radiationformulae using complex pole parameters is in quite agreemefit with that of by the exact theory

关 键 词：水 弹性球壳 共振声辐射理论 结构振动 

分 类 号：O427[理学—声学]