摘要
采用改进的基于声压测量的复矢径虚源法,研究典型结构水下辐射声场及其粘贴粘弹性材料的降噪特性。采用SYSNOISE边界元软件获取测量面声压,脉动球声辐射验证软件计算的准确性,而单点激励球壳声辐射验证复矢径法的有效性。研究结果表明:结合声阻抗传递和界面耦合理论,通过优化单点激励圆柱壳内部双球虚源的复矢径缩比与位置,可进一步提高其声场计算精度,复矢径法在工程上比传统虚源叠加法更具操作性和实用性。
An improved complex vector radius virtual source method based on sound pressure measurement is adopted to research radiation sound field of typical underwater structures and noise reduction character of its viscoelastic material.The boundary element method（BEM） software SYSNOISE is applied to obtain sound pressure on measurement surface,pulsating sphere sound radiation model is used to verify the correctness of software computation,is verified and effectiveness of complex vector radius method by sphere shell sound radiation under single point excitation.Research results show that combining acoustic impedance transferring and interface coupling theory,precision of sound field computation can be improved by optimizing complex vector radius ratio and positions of double spherical virtual source in cylindrical shell under single point excitation,the complex vector radius method is more operational and practical than traditional virtual source superposition method in engineering.
出处
《传感器与微系统》
CSCD
北大核心
2013年第6期25-29,共5页
Transducer and Microsystem Technologies
基金
水声技术国防科技重点实验室基金资助项目(9140C200203120C20083)
关键词
声学
粘弹性材料
复矢径
声阻抗传递
界面耦合
水下降噪
acoustics
viscoelastic material
complex vector radius
acoustic impedance transfer
interface coupling
underwater noise reduction
