学术
摘 要:
为评估水下航行体水动力辐射噪声性能，将航行体湿表面划分为若干子单元，运用功率谱的概左沙模态平均法，计算子单元受湍流脉动压力激励振动声辐射，根据声能迭加原理建立航行体水动力辐射噪声的计算方法。数值计算表明，水下航行体水动力辐射噪声的预报与国外方法提供结果基本一致，6m／s以上航速声压谱级最大偏差小于3dB，所建立的方法可用于水下航行体水动力辐射噪声的预报和评估。[著者文摘]
文章出处:
《水动力学研究与进展：A辑》-2007年22卷4期 -475-482页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-4874（2007）04-0475-08
Prediction of hydrodynamic radiation noise of underwater vehicle
LU Shi-jin, YU Meng-sa, Li Dong-sheng （China Ship Science Research Center, Wuxi 214082, China）
Abstract:
With using of sub-element method the vehicle is divided into a lot of panel sub-elements for predicting hydrodynamic radiating Noise of underwater vehicle. The vibration and sound radiation of each panel element induced by the wall fluctuation due to turbulent boundary layer are calculated based on the concept of power spectrum density and the mode average method. And the hydrodynamic sound radiation of the vehicle is predicted based on energy superposition principle. The results of numerical calculation show that the calculated results of hydrodynamic sound radiation from underwater vehicle agree with those from foreign literatures and the difference of sound pressure level is less than 3dB as the speed above 6m/s. This method can be applied in predicting hydrodynamic noise of underwater vehicle.[著者文摘]
Key words:
underwater vehicle; hydrodynamic radiation noise; prediction method
基金资助:
吕世金（1973-）,男,河南人,高级工程师,硕士.
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