复杂空间载流管道系统流固耦合动力学模型及其验证
收稿日期: 2012-02-22
修回日期: 2012-10-18
网络出版日期: 2013-03-29
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
Received date: 2012-02-22
Revised date: 2012-10-18
Online published: 2013-03-29
Supported by
Chengdu Aircraft Industrial (Group) Co., Ltd.Project
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x、y、z这3个方向的平动以及绕x、y、z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。
陈果 , 罗云 , 郑其辉 , 侯民利 , 蒲柳 . 复杂空间载流管道系统流固耦合动力学模型及其验证[J]. 航空学报, 2013 , 34(3) : 597 -609 . DOI: 10.7527/S1000-6893.2013.0097
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.
[1] Xu E J. The preliminary study on the integrity requirements of the aero-engine vessel structural. Aeroengine, 1994 (3): 53-62. (in Chinese) 许锷俊. 航空发动机导管结构完整性要求的初步研究. 航空发动机, 1994 (3): 53-62.
[2] Aero-engine Design Manual Total Editorial Committee. Aero-engine design manual (the 19th volume): rotor dynamics and machine vibration. Beijing: Aviation Industry Press, 2000: 208-226. (in Chinese) 航空发动机设计手册总编委会. 航空发动机设计手册(第19分册)转子动力学及整机振动. 北京: 航空工业出版社, 2000: 208-226.
[3] Li L, Yu L F. The research trends of fluid-solid coupling vibration problems of piping system. Chinese Journal of Applied Mechanics, 1997, 14(3): 40-48. (in Chinese) 李琳, 喻立凡. 管道及管路系统流固耦合振动问题的研究动态. 应用力学学报, 1997, 14(3): 40-48.
[4] Chieu C T. Bending vibration of a pipe line containing flow fluid. Taipei: Taipei Instilute of Technology, 1963.
[5] Paidoussis M P, Issid N T. Dynamic stability of pipes conveying fluid. Journal of Sound and Vibration, 1974, 33(3): 267-294.
[6] Jin J D, Yang X D, Zou G S. Stability and critical flow velocity of supported pipes conveying fluid. Chinese Journal of Mechanical Engineering, 2006, 42(11): 131-136. (in Chinese) 金基铎, 杨晓东, 邹光胜. 两端支承输流管道的稳定性和临界流速分析. 机械工程学报, 2006, 42(11): 131-136.
[7] Chen Z X, Zhang W H. Stability analysis of simple pipe system conveying fluid. Journal of Vibration Engineering, 1998, 11(l): 38-45. (in Chinese) 陈正翔, 张维衡. 简单输液管系的稳定性分析. 振动工程学报, 1998, 11(l): 38-45.
[8] Wang S Z, Liu Y L, Huang W H. Research of solid-liquid coupling dynamics of pipe convey fluid. Applied of Mathematics and Mechanics, 1998, 19(11): 51-55. (in Chinese) 王世忠, 刘玉兰, 黄文虎. 输送流体管道的固-液耦合动力研究. 应用数学和力学, 1998, 19(11): 51-55.
[9] Dang X Q, Huang Y L. Vibration of pipe in engineering. Mechanics and Engineering, 1993, 15(4): 9-16. (in Chinese) 党锡淇, 黄幼玲. 工程中的管道振动问题. 力学与实践, 1993, 15(4): 9-16.
[10] Tijsseling A S. Fluid-structure interaction in liquid-filled pipe systems: a review. Journal of Fluids and Structures, 1996, 10(2): 109-146.
[11] Paidoussis M P, Li G X. Pipe conveying fluid: a model dynamical problem. Journal of Fluids and Structures, 1993, 7(2): 137-204.
[12] Fuller C R. Sound radiation from an infinite elastic cylinder with dual-wave propagation-intensity distribution. Journal of Sound and Vibration, 1988, 122(3): 479-490.
[13] Xu L Q. Vibration research of marine conveying fluid pipeline system. Wuhan: Wuhan University of Technology, 2009: 16-30. (in Chinese) 徐丽琼. 船舶输流管道系统的振动研究. 武汉: 武汉理工大学, 2009: 16-30
[14] Tang Y J. Stress analysis of pressure piping. Beijing: China Petrochemical Press, 2010: 144-168. (in Chinese) 唐永进. 压力管道应力分析. 北京: 中国石化出版社, 2010: 144-168.
[15] Yang F Y, Chen G, Zhao W T. Model analysis of aircraft hydraulic pipe system and its experimental verification. Aeronautical Computing Technique, 2011, 41(4): 17-20. (in Chinese) 杨飞益, 陈果, 赵文涛. 飞机液压系统管道三维动力特性分析与实验验证. 航空计算技术, 2011, 41(4): 17-20.
/
| 〈 |
|
〉 |
CJA