Vibration Characteristics Analysis of an Aeronautical Hydraulic Straight Pipe with Slant Crack

被引：0
|
作者：
Dou J.-X. [1 ]
Yu X.-G. [1 ]
Yang T.-G. [1 ]
Liu Z.-X. [1 ]
机构：
[1] Institute of Mechanical Engineering, Liaoning University of Science and Technology, Anshan
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2022年 / 43卷 / 02期
关键词：
Aero hydraulic straight pipe; Finite element method; Slant crack; Stress intensity factor; Vibration response;
D O I：
10.13675/j.cnki.tjjs.200264
中图分类号：
学科分类号：
摘要：
In order to study the vibration response features of aero hydraulic straight pipeline with cracks and avoid the catastrophic failure of hydraulic pipeline system, considering about the influence of shear force and shear coefficient, the expression of local flexibility coefficient is derived for hydraulic straight pipe with slant cracks for the latent fault in hydraulic straight pipe, thus building the fluid-structure coupled finite element model for hydraulic straight pipe with slant cracks. Newmark-β integral method is used to solve the vibration response of hydraulic straight pipe. The correctness of finite element model is verified by comparing the results between numerical calculation and experimental test. The model is used to analyze the effects of crack angle and rotation speed of plunger pump on the vibration response of hydraulic straight pipeline system. As shown by results, the vibration response of hydraulic straight pipe is affected by the change of crack angle. The amplitude for vibration response of hydraulic straight pipe is minimum when the crack angle is close to 0°. The larger the crack angle, the more significant the effects of cracks on vibration response of hydraulic straight pipe are. Under different rotation speeds, the amplitude for vibration response of hydraulic straight pipe with straight cracks is larger than that with slant ones. © 2022, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：260 / 268
页数：8
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