首页 >

复杂空间载流管道系统流固耦合动力学模型及其验证

陈果1,2, 罗云2, 郑其辉2, 侯民利2   

  1. 1. 南京航空航天大学 民航学院, 江苏 南京 210016;
    2. 成都飞机工业(集团)有限责任公司, 四川 成都 610092
  • 收稿日期:2012-02-22 修回日期:2012-10-18 出版日期:2013-03-25 发布日期:2013-03-29
  • 通讯作者: 陈果,Tel.: 025-84891850 E-mail: cgzyx@263.net E-mail:cgzyx@263.net
  • 作者简介:陈果 男, 博士, 教授, 博士生导师。主要研究方向: 航空发动机状态监测与故障诊断、 智能诊断与专家系统、 机器学习与知识获取、 图像处理及模式识别、 非线性转子动力学等领域研究。 Tel: 025-84891850 E-mail: cgzyx@263.net罗云 男, 学士, 成都飞机工业(集团)有限责任公司副总工艺师、 研究员。主要研究方向: 飞机制造工艺。郑其辉 男, 学士, 成都飞机工业(集团)有限责任公司副总工程师、 研究员。主要研究方向: 飞机制造。侯民利 男, 学士, 成都飞机工业(集团)有限责任公司高级工程师。主要研究方向: 飞机制造。蒲柳 男, 学士, 成都飞机工业(集团)有限责任公司高级工程师。主要研究方向: 飞机结构振动测试与分析。
  • 基金资助:

    成都飞机工业(集团)有限责任公司项目

Fluid-structure Coupling Dynamic Model of Complex Spatial Fluid-conveying Pipe System and Its Verification

CHEN Guo1,2, LUO Yun2, ZHENG Qihui2, HOU Minli2   

  1. 1. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Chengdu Aircraft Industrial (Group) Co., Ltd., Chengdu 610092, China
  • Received:2012-02-22 Revised:2012-10-18 Online:2013-03-25 Published:2013-03-29
  • Supported by:

    Chengdu Aircraft Industrial (Group) Co., Ltd.Project

摘要:

针对飞机复杂管路系统振动分析,提出了一种复杂空间管道系统流固耦合动力学模型,在模型中用梁单元对管道进行了离散,每个节点考虑了xyz这3个方向的平动以及绕xyz这3个方向的转动,共计6个自由度;在单元中考虑了流固耦合效应,计及了流体流速对管道振动的影响;建立了管道与基础、管道与管道间的弹性连接,以适应多个管道之间的耦合振动分析;模型采用Newmark-β数值积分法获取系统响应。针对实际液压试验台的空间管路系统,利用锤击法进行实验模态分析,将本文模型的仿真结果与实验结果和商用有限元软件ANSYS Workbench的计算结果进行了分析比较,验证了本文模型的正确性。最后,仿真计算了流固耦合作用下流速对管道系统固有频率的影响规律。

关键词: 管道系统, 流固耦合动力学, 有限元, 模态分析, 数值仿真

Abstract:

For the vibration analysis of complex aircraft pipe systems, a spatial fluid-structure coupling dynamic model is proposed. In this model the finite element method is adopted, the pipe is modeled using the beam element, and a node has 6 degrees of freedom, which includes the movements along and around the x, y and z directions. The fluid-structure coupling effect is considered, and the effect of fluid flow speed on the structure vibration is analyzed. The connections between the pipe and the base, and the connections between two pipes are considered in order to model the coupling vibration for a multi-pipe. The dynamic responses are obtained through direct numerical integration by using the Newmark-β method. The pipe vibrations due to base excitations, pressure fluctuation, and the fluid-structure coupling effect are also analyzed. The spatial pipe system of a practical hydraulic test stand is used to verify the new model. An experimental modal analysis is carried out by the hammering method. The spatial pipe model is modeled by the new method proposed in this paper, and the computation results are compared with the experimental results and those of the commercial finite software ANSYS Workbench. The results show the validity and the effectiveness of the new model. Finally, the effect of the fluid speed on the pipe system natural frequencies is simulated.

Key words: pipe system, fluid-structure coupling dynamics, finite element, modal analysis, numerical simulation

中图分类号: