【作者】 陈明； 徐俊； 程利；

【Author】 Chen Ming;Xu Jun;Cheng Li;Wuhan No.2 Ship Design & Research Institute;

【机构】 武汉第二船舶设计研究所；

【摘要】 机械噪声是我国舰船噪声控制的难点和重点,随着大量新技术的应用,机械设备通过基座传递的振动已得到有效控制,系统管路形成的第二通道已成为振动噪声传递重要途径。影响管路振动噪声的因素很多,其中通海口格栅型式容易被忽略。本文针对对柱状格栅和蜂窝状格栅两种通海口型式进行了计算分析,采用大涡模拟方法(LES)模拟流场,采用FW-H方程计算远场水动力噪声。通过对比脉动压力和远场噪声声压级,得到了流致噪声较小的构型,并分析了成因。更多还原

【Abstract】 Mechanical noise is the key point and difficulty of ship noise control in China.With the application of a lot of new technologies,the vibration transmitted by mechanical equipment through the foundation support has been effectively controlled,and the second channel formed by the system pipelines has become an important way to transmit the vibration and noise.There are many factors that affect the pipeline vibration,among which the sea-port gratings of the ship pipeline are easily ignored.In this paper,the calculation and analysis of two types of sea-port gratings are carried out.The large eddy simulation(LES) is used to simulate the flow field,and the FW-H equation is used to calculate the far-field flow noise.By comparing the pulsating pressure and the far-field sound pressure,the smaller sea-port grating configuration of the flow-induced noise is obtained.更多还原