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Risk prediction method of aircraft hard landing based on flight data
Published in Stein Haugen, Anne Barros, Coen van Gulijk, Trond Kongsvik, Jan Erik Vinnem, Safety and Reliability – Safe Societies in a Changing World, 2018
Liping Zheng, Jinsong Xie, Silin Qian
Hard landing, also known as hard landing, is an extremely important safety hazard for the impact of flight safety during the landing stage. Hard landing may cause damage to the aircraft structure, result in direct or indirect financial loss, damage to comfort and other adverse consequences. Hard landing can cause damage to aircraft components or systems under heavy loads (eg, landing gear, wings, etc.) and, in severe cases, damage to the aircraft and casualties. Boeing points out that the acceleration of the plane’s vertical to the ground exceeds the specified limit when it touchdown, and it can be judged to be a hard landing. The Airbus defines hard landing as a phenomenon that the acceleration or speed of an aircraft vertical to the ground exceeds the specified threshold. Thus, the landing load (that is, the vertical acceleration when the aircraft landed) is to determine the landing of the aircraft or not the key indicator. Accurate landing loads are predicted prior to the aircraft landing can identify the risk of hard landing events in time, and take appropriate measures in time (such as go around), which can reduce the frequency of hard landing events to a certain extent, and improve the safety of aircraft landing.
A Method of Applying Flight Data to Evaluate Landing Operation Performance
Published in Ergonomics, 2019
Lei Wang, Jingyi Zhang, Chuanting Dong, Hui Sun, Yong Ren
In formula (2), , and represent the probability of the three respective landing incidents. Taking as an example, is the distribution function of vertical acceleration of a specific model of aeroplane. If the value of vertical acceleration for a specific flight is closer to the expectation, the possibility of hard landing is lower. As Figure 3 shows, if we took a regional probability as the probability of hard landing, the expectation of the distribution function is regarded as symmetric around the axis, and the sample value is regarded as the width.
Determining the allowable opening-to-traffic asphalt temperature for airport pavements
Published in International Journal of Pavement Engineering, 2022
Taqia Rahman, Andrew Dawson, Nick Thom, Imtiaz Ahmed, Juan S. Carvajal-Munoz
For all interface conditions, it was observed that aircraft full braking (in the presence of a friction coefficient of 0.8) was the most critical loading condition for interface shear failure of asphalt. It was also found that aircraft turning at RETs was more critical than typical aircraft landing (not hard landing). The taxiing/take-off and landing movement caused lower shear failure as compared to aircraft full braking and turning at a RET. These results suggest that to avoid premature shear damage during the early life of a new asphalt overlay, airport authorities should consider limiting aircraft turning and hard braking activities.