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JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Mechanical Engineering     
Influence factors analysis on frequency domain characteristics of expansion loop
QUAN Ling xiao, LI Dong, LIU Song, LI Chang chun, KONG Xiang dong
1. Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University,
Qinhuangdao 066004, China| 2. The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University,
Hangzhou 310000, China| 3. Shanghai Aircraft Design and Research Institute, Shanghai 200232, China
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Abstract  

The 14equation dynamic model of aviation pipe with expansion loop was established and solved by transfer matrix method. The influence of bending radius and angle on the pipeline frequency domain characteristics were investigated, when expansion loop length was certain. Variation rules between expansion loop natural frequency and bending angle with different wall thickness and radius were studied. The effect of expansion loop height and length on natural frequency were analyzed. Simulation results show that the smaller the bending angle and radius, the higher natural frequency of expansion loop; The variation of natural frequency with bending angle is not affected by wall thickness. The influence of bending angle on natural frequency will be smaller when inner radius decreases. The effect of expansion loop height on natural frequency is linear, but the effect of expansion loop length on natural frequency is nonlinear and the influence of change in length on natural frequency is more obvious when its length is shorter.



Published: 01 June 2016
CLC:  TH 137| V 228  
Cite this article:

QUAN Ling xiao, LI Dong, LIU Song, LI Chang chun, KONG Xiang dong. Influence factors analysis on frequency domain characteristics of expansion loop. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(6): 1065-1072.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008973X.2016.06.008     OR     http://www.zjujournals.com/eng/Y2016/V50/I6/1065


膨胀环频域特性影响因素分析

 针对带有膨胀环的航空液压管路,建立14方程动力学模型,利用传递矩阵法对该方程进行求解.研究在膨胀环总长一定时,弯曲半径、折弯角度对管路频域特性的影响.分析不同壁厚、内半径时,膨胀环固有频率与折弯角度之间的变化规律.分析膨胀环高度及长度对膨胀环固有频率的影响.仿真结果表明:膨胀环折弯角度与弯曲半径越小,管路的固有频率越高|固有频率随折弯角度的变化趋势不受壁厚的影响|内半径越小,折弯角度对固有频率的影响越小|固有频率与胀环高度具有线性关系,与膨胀环长度具有非线性关系,并且膨胀环长度越小,长度变化对固有频率的影响越明显.

[1] 白欢欢.基于变刚度弹性支承的液压管路流固耦合振动的数值分析[D].秦皇岛: 燕山大学, 2014.
BAI Huanhuan. Numerical analysis on the fluidsolid coupling vibration of hydraulic pipeline with elastic support [D]. Qinhuangdao: Yanshan University, 2014.
[2] LI B H, GAO H S, LIU Y S, et al. Transient response analysis of multispan pipe conveying fluid [J]. Journal of Vibration and Control, 2012, 19(14): 2164-2176.
[3] SIEVERS J, KECKMANN K, PALLASMONER G, et al. Structural mechanical and thermal hydraulic aspects on the behavior of crack like leaks in piping [J]. Progress in Nuclear Energy, 2015, 84: 18-23.
[4] LI X, WANG S P. Flow eld and pressure loss analysis of junction and its structure optimization of aircraft hydraulic pipe system [J]. Chinese Journal of Aeronautics, 2013, 26(4): 1080-1092.
[5] LIU G M, LI Y H. Vibration analysis of liquidfilled pipelines with elastic constraints [J]. Journal of Sound and Vibration, 2011, 330(13): 3166-3181.
[6] ZANGANEH R. AHMADI A, KERAMAT A. Fluidstructure interaction with viscoelastic supports during waterhammer in a pipeline [J]. Journal of Fluids and Structures, 2015, 54: 215-234.
[7] WOOD D J, CHAO S P. Effect of pipeline junctions on waterhammer surges [J]. Transportation Engineering Journal, 2014, 97(3): 441-457.
[8] BROWN F T, TENTARELLI S C. Dynamic behavior of complex fluidfilled tubing systemspart 1: tubing analysis [J]. Journal of Dynamic Systems, Measurement, and Control, 2001, 123(1): 71-77.
[9] TENTARELLI S C, BROWN F T. Dynamic behavior of complex fluidfilled tubing systemspart 2: system analysis [J]. Journal of Dynamic Systems, Measurement, and Control, 2001, 123(1): 79-84.
[10] LI S J, LIU G M, KONG W T. Vibration analysis of pipes conveying fluid by transfer matrix method [J]. Nuclear Engineering and Design, 2014, 266: 78-88.
[11] XU Y Z, JOHNSTON D N, JIAO Z X, et al. Frequency modelling and solution of fluidstructure interaction in complex pipelines [J]. Journal of Sound and Vibration, 2014, 333(10): 2800-2822.
[12] CESANA P, BITTER N. Modeling and analysis of waterhammer in coaxial pipes [J]. Journal of Fluids and Structures, 2014, 51: 226-239.
[13] 李艳华,柳贡民,马俊.考虑流固耦合的典型管段结构振动特性分析[J]. 振动与冲击, 2010, 29(6): 50-53.
LI Yanhua, LIU Gongmin, MA Jun. Research on fluidstructure interaction in fluidfilled pipes [J]. Journal of Vibration and Shock, 2010, 29(6): 50-53.
[14] OUYANG X P, GAO F, YAND H Y. Modal analysis of the aircraft hydraulicsystem pipeline [J]. Journal of Aircraft, 2012, 49(4): 1168-1174.
[15] AHMADI A, KERAMAT A. Investigation of fluidstructure interaction with various types of junction coupling [J]. Journal of Fluids and Structures, 2010, 26(7/8): 1123-1141.
[16] DAI H L, WANG L, QIAN Q, et al. Vibration analysis of threedimensional pipes conveying fluid with consideration of steady combined force by transfer matrix method [J]. Applied Mathematics and Computation, 2012, 219(5): 2453-2464.
[17] LI S J, KARNEY B W, LIU G M. FSI research in pipeline systemsa review of the literature [J]. Journal of Fluids and Structures, 2015, 57: 277-297.
[18] LI Q S, YANG K, ZHANG L X, et al. Frequency domain analysis of fluidstructure interaction in liquidfilled pipe systems by transfer matrix method [J]. International Journal of Mechanical Sciences, 2002,44(10): 2067-2087.

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