摘要
介绍一种舰船辐射噪声1/3 Oct谱模型建立方法。通过分别对机械噪声、螺旋桨直接辐射噪声及桨轴激励艇体振动噪声的特征规律研究,建立了机械和螺旋桨的额定声压脉动谱模型及桨轴激励艇体响应函数模型。根据机械噪声和螺旋桨噪声同航速的变化关系,得到不同转速下的合成辐射噪声1/3 Oct谱。利用Matlab GUI编写舰船辐射噪声仿真软件,给出了1组仿真结果。
A method about modeling the 1/3 octave spectral of naval ship radiated noise was introduced.Based on the study of the characteristic rule of the machinery noise,propeller noise and propeller-shafting-submarine body system＇ vibration noise,the model of machinery and propeller＇s rated sound spectrograph were established,while the response function model of propeller-shafting acting of submarine body was obtained.According to the relationship between the propeller noise and the speed of submarine,the 1/3 octave spectral of compound radiated noise in various conditions were got.The simulation program of naval ship radiated noise was written and the result was got via Matlab GUI platform.
出处
《舰船科学技术》
2011年第7期68-70,共3页
Ship Science and Technology
关键词
辐射噪声
艇体函数
仿真模型
radiated noise
submarine body function
simulation model
