任意边界条件下输流管道振动特性分析
Vibration characteristic analysis of fluid-filled pipeline with arbitrary boundary conditions
吴江海 1朱真慧 2石杰栋 1侯希晨 1刘碧龙3
作者信息
- 1. 中国船舶科学研究中心,江苏 无锡 214082;船舶振动噪声重点实验室,江苏 无锡 214082
- 2. 中国船舶科学研究中心,江苏 无锡 214082
- 3. 青岛理工大学 机械与汽车工程学院,山东 青岛 266520
- 折叠
摘要
[目的]旨在开展船舶输流管道在任意边界条件下的振动噪声预报.[方法]基于直管十四方程流固耦合模型,使用阻抗综合法建立空间管路动力学模型,并采用人工弹簧的方法在阻抗矩阵中实现任意边界条件.对空间管路固有频率进行有限元验证,并针对弹性边界刚度对管路固有频率的影响规律开展研究.最后,开展实验室中空管和充水两种状态下管路传递函数计算试验的验证分析.[结果]结果显示,所提空间管路计算方法正确,可模拟实际工程中管路弹性安装边界;任意边界中扭转刚度的影响比剪力刚度的影响更为灵敏.[结论]所提计算方法和研究结果可为管路系统声学设计提供参考.
Abstract
[Objective]This study seeks to carry out the vibration and noise prediction of a ship fluid-con-veying pipeline under arbitrary boundary conditions.[Methods]A 14-equation fluid-structure interaction model of a straight pipeline is taken as the basis,the impedance synthesis method is used to establish a dynam-ic model of the spatial pipeline,and the artificial spring method is employed to realize the arbitrary boundary conditions in the impedance matrix.The finite element verification of the natural frequency of the spatial pipeline is carried out to further study the influence of elastic boundary stiffness on the natural frequency.Fi-nally,the experimental verification of the transfer function calculation of the pipeline in the two states of hol-low and fluid-filled is carried out in the laboratory.[Results]It is found that the method in this paper can simulate the arbitrary elastic boundaries of pipeline installation in actual engineering,and the influence of tor-sional stiffness is more sensitive than that of shear stiffness.[Conclusion]The calculation method and re-search results herein can provide valuable references for the acoustic design of pipeline systems.
关键词
充液管路/阻抗综合法/任意边界/振动特性Key words
fluid-filled pipeline/impedance synthesis method/general boundary conditions/vibration characteristic引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据