The analysis and estimation of vibration fatigue for pipe fitting in aviation hydraulic system

Zhang, Fuli; Yuan, Zhaohui; Zhang, Fuzhi; Liang, Na

doi:10.1016/j.engfailanal.2019.07.038

Cited by 23 publications

(6 citation statements)

References 11 publications

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“…Similarly, considering the inherent frequency (6) and critical flow velocity (12), after mathematical derivation and rearrangement of terms, equation ( 18) can be expressed as e relevant time function F r (t) can be obtained by solving equation (18) or (19). Hence, the response of the fluid-solid coupling vibrations in the hydraulic pipeline system is…”

Section: Dynamic Behavior Of the Hydraulic Pipeline Systemmentioning

confidence: 99%

“…us, the key lies in the reduction and mitigation of the vibrations in hydraulic pipeline systems. For this reason, the behavior and characteristics of fluid-solid coupling vibrations in hydraulic pipeline systems need to be adequately studied to obtain effective guidance to prevent vibrations in hydraulic pipeline systems [18][19][20]. Ebrahimi et al developed a nonlocal couple stress theory to investigate static stability and free vibration characteristics of functionally graded nanobeams [21].…”

Section: Introductionmentioning

confidence: 99%

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Analytical Method for Fluid‐Solid Coupling Vibration Analysis of Hydraulic Pipeline System with Hinged Ends

Zhang

Cui

2021

Shock and Vibration

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The vibrations in hydraulic pipeline systems inevitably involve the interaction between the two-phase media of a solid and fluid. The fluid flowing in the pipeline generates pressure on the pipeline wall and thus causes vibration and deformation in the pipeline, which in turn changes the fluid flow condition, thereby cyclically affecting the deformation and motion of the solid and fluid and making the pipeline system vulnerable to vibration damage. Therefore, it is of great theoretical and practical value to investigate the vibration behavior and characteristics of hydraulic pipeline systems. In this study, the fluid flow-induced vibrations in a pipeline system are investigated based on Housner’s differential vibration equation of fluid pipelines. Through the application of relevant mathematical theories and methods, the derivation of the inherent characteristics and dynamic behavior of a hydraulic pipeline system with two hinged ends is simplified, and the corresponding equations for the natural frequencies and dynamic response of the system are obtained. The analytical method for analyzing the vibration behavior and characteristics of the system is presented, and the analytical results of the vibration analysis of the system are obtained through computer simulation, providing a theoretical and technical basis for the safe and reliable operation of the hydraulic pipeline system.

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Section: Dynamic Behavior Of the Hydraulic Pipeline Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical Method for Fluid‐Solid Coupling Vibration Analysis of Hydraulic Pipeline System with Hinged Ends

Zhang

Cui

2021

Shock and Vibration

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“…Wang et al [24] conducted research on fatigue life prediction for metal thinwalled aircraft structures under thermal acoustic loads and verified it through fatigue tests. Zhang et al [25,26] analyzed the influence of thermal vibration loads on the stress-strain and fatigue life of aviation hydraulic pipelines, and they established a thermal vibration coupled stress model for pipelines. Wang et al [27] investigated a method for determining the dynamic strength safety margin and fatigue durability of pipeline structures under combined loading from pre-stressing and random excitation.…”

Section: Introductionmentioning

confidence: 99%

Optimal Transport Meshless Method Based Fatigue Life Calculation Method for Hydraulic Pipelines under Combined Excitation

Li,

Fan,

et al. 2024

Applied Sciences

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The issue of fatigue in modern hydraulic pipelines is increasingly severe, and there remains a lack of effective prediction methods for pipeline fatigue life. In practical engineering, hydraulic pipelines are primarily subjected to random excitation and fluid excitation, representing a typical composite excitation. Most current research relies on solutions considering only single excitations, which leads to inaccuracies. To accurately calculate the fatigue life under composite excitation, this study incorporates resonance excitation and pulsation excitation into the optimal transport meshless method (OTM) within a strong fluid–structure coupling computational framework. Subsequently, by utilizing the hazard point method based on obtained stress data, an estimation of the service life for engine hydraulic lines can be determined. This work provides both practical guidance and theoretical insights for designing hydraulic lines in modern aircraft.

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“…1,2 Thus, the vibration fatigue problem has become one of primary concerns for engineers when these structures are subjected to random dynamic loadings. [3][4][5][6][7][8][9][10][11][12] Real random vibration environment excitations usually have a wide frequency bandwidth, including some excitation frequencies that may resonate with the multi-order nature frequencies of given engineering structures. [13][14][15] Structural critical locations in such structures are generally subjected to complex multiaxial stress states, especially under multi-directional excitation conditions.…”

Section: Introductionmentioning

confidence: 99%

“…In the real world, a great many of engineering structures in service are often exposed to complex random vibration excitations 1,2 . Thus, the vibration fatigue problem has become one of primary concerns for engineers when these structures are subjected to random dynamic loadings 3–12 . Real random vibration environment excitations usually have a wide frequency bandwidth, including some excitation frequencies that may resonate with the multi‐order nature frequencies of given engineering structures 13–15 .…”

Section: Introductionmentioning

confidence: 99%

The influence of load correlation on vibration fatigue damage of symmetrical notched cantilever beam structures

Luo,

Zhou,

Fan

et al. 2023

Fatigue Fract Eng Mat Struct

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This paper aims to develop an innovative multiaxial fatigue criterion based on the stress invariant, in order to perform the fatigue damage analysis of engineering structures subjected to random vibrations. First, the change rule of structural vibration fatigue lifetime under different load correlation conditions is systemically studied by experiments. Then, the finite element analysis of such a structure, including the modal analysis and the spectral analysis, is implemented in order to compute the response stress power spectral density (PSD) functions at the critical fatigue‐prone location under coupled random acceleration base excitations. Finally, the influence rule of load correlation on the vibration fatigue damage of such a symmetrical structure is theoretically illustrated through formula derivation. Moreover, combined with the critical distance theory point method, the proposed time/frequency‐domain multiaxial fatigue criterion is applied for vibration fatigue lifetime evaluation of the structure. The lifetime prediction accuracy of the proposed multiaxial fatigue criterion is verified by comparing with the vibration fatigue test results.

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The analysis and estimation of vibration fatigue for pipe fitting in aviation hydraulic system

Cited by 23 publications

References 11 publications

Analytical Method for Fluid‐Solid Coupling Vibration Analysis of Hydraulic Pipeline System with Hinged Ends

Analytical Method for Fluid‐Solid Coupling Vibration Analysis of Hydraulic Pipeline System with Hinged Ends

Optimal Transport Meshless Method Based Fatigue Life Calculation Method for Hydraulic Pipelines under Combined Excitation

The influence of load correlation on vibration fatigue damage of symmetrical notched cantilever beam structures

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