船用离心泵低频振动特性分析  

Analysis of Low-frequency Vibration Characteristics of Marine Centrifugal Pump

作　　者：郭宁[1,2,3] 向阳[1,2,3] 张波[1,2,3] 何鹏[1,2,3] GUO Ning;XIANG Yang;ZHANG Bo;HE Peng(a.School of Energy and Power Engineerin;b.Key Laboratot7 of High Peribrmance Ship Technolog;c.Key Laboratot7 of Marine Power Engineering ＆ Technology,Ministt7 of Communications,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063 [2]武汉理工大学高性能船舶技术教育部重点实验室,武汉430063 [3]武汉理工大学船舶动力系统运用技术交通行业重点实验室,武汉430063

出　　处：《船海工程》2018年第4期88-93,共6页Ship & Ocean Engineering

基　　金：国家自然科学基金(51279148);武汉理工大学自主创新研究基金(175205008)

摘　　要：为了控制舱室辅机设备对船体振动及声辐射的影响,针对离心泵的机脚在0~400 Hz内的振动特性问题,建立离心泵的流体域和结构域有限元模型,采用流固耦合方法分别对几种工况的流动进行仿真,得到离心泵在不同工况下的机脚振动加速度。结果表明,离心泵蜗壳一侧的机脚在叶频和叶频2倍频处的振动比转频处的强烈;每个机脚只需提取一个节点的振动数据就可满足振动特性的分析要求;对于蜗壳一侧的机脚,远离离心泵出口侧的机脚振动加速度级比靠近出口侧的机脚大4.89 d B;离心泵机脚在转频、叶频以及叶频2倍频处的振动在1.20 Q工况时呈下降趋势。In order to control the influence of the auxiliary equipment on the hull vibration and sound radiation,the vibration characteristics of the centrifugal pump in 0-400 Hz were analyzed. The FE model of the fluid domain and the structure was established. The flow of several cases was simulated by fluid-structure coupling method to obtain the vibration acceleration of the centrifugal pump under different working conditions. The results showed that the vibration of the feet on the side of the volute of the centrifugal pump at the blade frequency and double blade frequency was stronger than that at the rotating frequency. Each foot only need to extract vibration data of one node can meet the analysis requirements of the vibration characteristics. For the side of the volute side of the foot,away from the centrifugal pump outlet side of the foot vibration acceleration level than the exit side of the machine feet 4. 89 d B. The centrifugal pump foot vibration in the 1. 20 working conditions showed a downward trend.

关 键 词：离心泵 低频振动 流固耦合 机脚振动 

分 类 号：U664.5[交通运输工程—船舶及航道工程] TH311[交通运输工程—船舶与海洋工程]