| Citation: | DONG Apeng, LI Shu, ZHU Wenguo, et al. Influence factor analysis of catapult launch safety for carrier-based aircraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(11): 2396-2404. doi: 10.13700/j.bh.1001-5965.2018.0151(in Chinese)
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To comprehensively investigate the safety performance of carrier-based aircraft (CBA) catapult takeoff process, a multi-body coupled dynamics model was established in absolute coordinate system with the natural coordinate method. Based on the simulation curves of catapult launch, the influence of different parameters on catapult safety is studied from two aspects:the CBA acceleration and the flight trajectory. The simulation results show that the catapult force and the engine thrust are the main reasons that affect the horizontal acceleration during taxiing process and airborne flight process respectively, while the takeoff weight imposes great effects during the entire catapult process; although the enhancement of the fixed-load plug has little effect on the acceleration and flight trajectory, the influence on structure vibration and time delay cannot be ignored; longer deck edge distance can increase the departure lift and reduce the trajectory descent effectively; carrier pitch can cause great sink, so it is important to avoid the departure when carrier pitch is at the maximum, and meanwhile the early release of the holdback bar caused by the ship motion should be considered for controlling the catapult time; catapult launch safety design is a multivariate optimization process and needs comprehensive analysis of various factors rather than focusing on single factor.
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