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| Fatigue Life of a Vehicle Tank Under Random Vibration |
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| DOI：10.7643/issn.1672-9242.2022.07.013 |
| KeyWord:high cycle fatigue modal test modal analysis harmonic response analysis natural frequency frequency domain analysis of random vibration fatigue life |
| Author | Institution |
| TANG Yuan-zhang |
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan , China;Key Laboratory of Special Equipment Safety and Energy Saving of State Administration for Market Regulation, China Special Equipment Inspection and Research Institute, Beijing , China |
| YANG Zhi-rong |
Key Laboratory of Special Equipment Safety and Energy Saving of State Administration for Market Regulation, China Special Equipment Inspection and Research Institute, Beijing , China |
| MA Dian-guo |
Key Laboratory of Special Equipment Safety and Energy Saving of State Administration for Market Regulation, China Special Equipment Inspection and Research Institute, Beijing , China |
| GAO Hai-bo |
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan , China |
| YANG Zai-ming |
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan , China;Key Laboratory of Special Equipment Safety and Energy Saving of State Administration for Market Regulation, China Special Equipment Inspection and Research Institute, Beijing , China |
| LIN Zhi-guo |
School of Energy and Power Engineering, Wuhan University of Technology, Wuhan , China |
| DU Qin |
Beijing North Vehicle Group Co., Ltd., Beijing , China |
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| Abstract: |
| The working environment of fuel tank is complex and changeable. The paper aims at the problem that it is difficult to predict the high cycle fatigue life of a vehicle fuel tank and to study the fatigue life of the equipment under random load environment. Firstly, the natural frequency and mode shape of vehicle tank are obtained by modal test, and the simulation model of the vehicle fuel tank is established by SolidWorks. Modal analysis, random vibration analysis and harmonic response analysis are carried out in ANSYS Workbench. Finally, through the nCode SN vibration (DesignLife) module of ANSYS Workbench software, the fatigue life of fuel tank under multiple acceleration power spectral density is studied by using the narrowband method of nCode module based on the frequency domain analysis method of random vibration fatigue life. The results show that the natural frequency and mode shape of modal test and simulation are basically the same, the longitudinal direction of the tank is severe. Fatigue life of the tank decreases with the increase of power spectral density amplitude at the lower natural frequency under known power spectral density spectrum, but the weak part of the tank remains unchanged. The established simulation model is accurate, this study can provide a reference for the optimization design of fuel tank and the subsequent fatigue test of fuel tank. |
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