|
| Response Spectrum Method for Vibration Fatigue Life Assessmentof Aero-hydraulic Pipelines |
| Received:August 09, 2024 Revised:September 19, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.09.001 |
| KeyWord:aero-hydraulic pipelines fatigue response spectrum method high-cycle fatigue non-classical damping multi-support random excitation frequency-domain method |
| Author | Institution |
| SUI Guohao |
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China |
| YAN Shanteng |
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China |
| YANG Yongbo |
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China;GREE Electric Appliances, Inc.of Zhuhai, Guangdong Zhuhai , China |
| ZHANG Yahui |
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to realize the accurate and efficient assessment of the high-cycle fatigue life of aero-hydraulic pipeline systems under fully/partially coherent base excitation. A response spectrum method was proposed to evaluate the high-cycle fatigue life ofaero-hydraulic pipeline systems under uniform/multi-support excitation, considering the Coriolis force induced by the fluidand the additional damping of fixtures. Firstly, a complex modal superposition method was employed.The system was decoupled intoa series ofsingle-degree-of-freedom systems in state space. Combining with random vibration theory, an explicit expression for the stress response of aero-hydraulic pipeline systems under fully/partially coherent base excitation was derived. Subsequently, based on the existing fatigue response spectrum method, the generalized correlation coefficients related to modal velocity and base excitation were introduced,accounting for the non-proportional damping and multi-support excitation effect,and a specified fatigue response spectrum method of aero-hydraulic pipeline systemsunder fully/partially coherent base excitationwas established. The rain-flow counting method was used to verify the accuracy of the proposed method, and the analysis efficiency was discussed. At the same time, the influence of fluid velocity and the partial coherence of excitation on the fatigue life of the systemswas investigated.The proposed method possesses high efficiency and stable accuracy, introducing fluid load and multi-support excitation effect on the fatigue life, which can meet the needs of fatigue analysis of complex aero-hydraulic pipeline systems in engineering. |
| Close |
|
|
|