充液分支管流固耦合振动及功率流分析  

Fluid-structure Interaction and Power Flow Analysis of Fluid Filled Branched Pipe

作　　者：吴江海[1] 孙玉东[1] 尹志勇[1] WU Jianghai;SUN Yudong;YIN Zhiyong(National Key Laboratory on Ship Vibration and Noise,China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心船舶振动噪声重点实验室,无锡214082

出　　处：《中国造船》2023年第2期253-263,共11页Shipbuilding of China

摘　　要：充液分支管中存在强烈的流固耦合现象。传递矩阵法通常适用于链式结构,论文将管路流固耦合传递矩阵转换为阻抗矩阵,利用分支节点处位移、力、管内流体及声压4个连续性边界条件,通过坐标变换,建立整体坐标系中分支管流固耦合计算模型。对比FEM商业软件计算结果,进行分支管流固耦合振动及功率流计算方法验证。计算结果表明:论文采用的阻抗综合计算方法,过程简单,结果精确;在分支管节点处,弹性波功率流会发生波形转换,使激励力输入功率流转换为面内其它波形的功率流。There exists strong fluid-structure interaction phenomenon in fluid filled branched pipe system.In this paper,the fluid-structure interaction transfer matrix of the pipe is transformed into the impedance matrix.By using four continuous conditions of displacement,force,fluid and sound pressure at the branch node,a fluid-structure interaction calculation model of the branched pipe is established with coordinate transformation.The acoustic induced vibration and vibration power flow are compared with the results in FEM.The results show that the impedance synthesis method in this paper is simple and accurate.At the junction of branch pipe,the power flow of the elastic wave will be converted into other wave forms.

关 键 词：分支管路 流固耦合 功率流 阻抗综合法 波形转换 

分 类 号：TB123[理学—工程力学]