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| Analysis of Loading Condition of Bonding Interface under Road Transportation Vibration Environment |
| Received:June 29, 2021 Revised:July 26, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.09.004 |
| KeyWord:vibration load bonding interface load spectra modal analysis finite element |
| Author | Institution |
| XU Bo-qi |
Naval Aviation University, Yantai , China |
| LU Ming-zhang |
No.91049 Unit of PLA, Qingdao , China |
| LI Gao-chun |
Naval Aviation University, Yantai , China |
| LI Jin-fei |
Naval Aviation University, Yantai , China |
| WANG Yu-feng |
Naval Aviation University, Yantai , China |
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| Abstract: |
| To analyze the vibration load at the bonding interface of the engine during road transportation based on the measured data, and provide a basis for the vibration test. Acceleration sensors were used to record acceleration data under highway transportation, time-domain statistical analysis of the signals and the construction of load spectra were completed, simplified engine models were constructed through finite element software, and engine modal analysis and vibration process simulation were performed. Statistical analysis of the signal after removing the trend item showed that the signal peak value was greater than 3 times the root mean square value, indicating that the vibration data contained a sharply changing part. The signal kurtosis was 9.34, which belonged to the super-Gaussian distribution. The collected signal contained shock signals. Taking the simplified PSD as the input for modal analysis, the results showed that the bottom end of the back head had a large displacement of the bonding interface. From the four selected reference points, the frequency of the sudden change of the displacement and acceleration root mean square value was around 33 Hz. Simulation of the actual vibration process found that the stress on the bonding interface between the front head and the barrel section was relatively uniform, about 25 kPa, and the stress value at the junction of the head and the cylinder section was relatively large, especially at the top of the rear head. Concentration, the maximum stress value can reach 130 kPa. It can be seen from the stress history that the relaxation effect of grains made the stress amplitude decrease rapidly after the impact load. Through the combination of measured data and finite element software, the modal analysis of the engine bonding interface and the simulation of the actual vibration process are completed, which provides the basis for subsequent vibration tests. |
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