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| Dynamic Simulation and Experimental Verification of Carrier-based Aircraft |
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| DOI：10.7643/issn.1672-9242.2022.09.008 |
| KeyWord:carrier-based aircraft catapult launch rigid-flexible coupling impact dynamic response impact experiment structural strength |
| Author | Institution |
| ZHANG Hao-cheng |
Chengdu Aircraft Industry Group CO., Ltd., Chengdu , China |
| ZHI Ya-fei |
Chengdu Aircraft Industry Group CO., Ltd., Chengdu , China |
| LI Yong-gang |
Chengdu Aircraft Industry Group CO., Ltd., Chengdu , China |
| XU Yan |
Chengdu Aircraft Industry Group CO., Ltd., Chengdu , China |
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| Abstract: |
| In order to obtain the response law of dynamic load on the structure and the dynamic response characteristics of the front landing gear and the body structure connected with it during the shooting process of carrier-based aircraft, based on the multi-body system dynamics theory, this paper established a rigid-flexible coupling multi-body system dynamics model to describe the ejection process of the carrier-based aircraft fuselage. The ejection process was simulated and analyzed. Combined with the simulation ejection impact experiment, the dynamic response law of the structure at the moment of the traction load unloading was mainly studied. The acceleration and stress response data of each point in the force transmission path of the structure were obtained by simulation and experiment. The peak acceleration of the body structure measured by experiment reached 255g, while the peak stress at the same position was 85 MPa. The trend of simulation and experimental data were consistent. The results showed that the peak value of the impact dynamic response formed by the sudden unloading of the traction load attenuated along the force transmission path of the structure, and the peak value of heading acceleration response increased with the increase of traction release load at the moment of traction rod fracture. Although the peak value of transient acceleration reached a high level, the peak value of structural stress under transient action was not high enough to cause structural failure. The structural design should focus on the impact of the corresponding peak and vibration fatigue. |
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