ZHANG Jian'gang. The Influence of Aerodynamic Unsteady Effect on Maneuver Load of Aircraft Horizontal Tail[J]. International Journal of Plant Engineering and Management, 2019, 24(4): 193-205

The Influence of Aerodynamic Unsteady Effect on Maneuver Load of Aircraft Horizontal Tail
ZHANG Jian'gang
The First Aircraft Institute of Aviation Industry Corporation of China, Xi'an 710089, China
In this paper, the unsteady effect of airflow is introduced into the calculation of aircraft maneuver load, and the results are compared with those obtained by quasi-steady method. Taking the steep pitch maneuver of an aircraft as an example, two methods are used to calculate the aircraft response after the rudder input is given according to the specifications. The calculation results show that if the peak overload of the aircraft is the same, the horizontal tail load increases by about 1% when the unsteady effect of the airflow is taken into account. If the rudder input of the two methods is the same, the unsteady calculation method will increase more. At the same time, the calculation shows that the bigger the deflection speed of rudder surface is, the bigger the difference between them is. Therefore, in order to improve the design quality of aircraft, it is necessary to introduce the unsteady effect into the calculation of loads in the detailed design stage of aircraft.
Key words:    unsteady effect    maneuver load    rapid pitch    linear systems    load of horizontal tail   
Received: 2019-09-26     Revised:
DOI: 10.13434/j.cnki.1007-4546.2019.0401
Corresponding author:     Email:
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ZHANG Jian'gang

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