ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Flight Loads Design Technique for Flexible Aircraft Airdrop
Received date: 2013-12-02
Revised date: 2014-04-21
Online published: 2014-05-09
Supported by
National High-tech Research and Development Program of China (2012AA7022020)
Airdrop analysis is one of the maneuvers concerned by flight loads design. The state of the art in the airdrop load design mainly applies to the rigid aircraft, and it cannot solve the airdrop load design for the flexible aircraft encountering gust. In order to improve the precision of airdrop load design, dynamic response and structural load analysis approach considering the elastic vibration modes of the flexible aircraft encountering gust is presented. The key challenge of dynamic response analysis for flexible aircraft airdrop is the modeling method for linear time-variant system. Employing the stationary-basis method, dynamic response equations for flexible aircraft airdrop are established. The minimum-state (MS) method is employed to carry out rational aerodynamic approximation. A hybrid approach is employed to obtain the discrete gust load in time domain. The single heavy cargo airdrop is simulated numerically, focusing on the force from cargo to aircraft and the wing's load. Simulation results demonstrate that the dynamic response analysis method for flexible aircraft proposed in this paper can represent the airdrop load of aircraft and supply a technique to airdrop load for flexible aircraft.
Key words： flexible aircraft; airdrop; cargo moving; gust; flight loads
JING Zhiwei , HOU Zongtuan , GUO Zhaodian . Flight Loads Design Technique for Flexible Aircraft Airdrop[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(11) : 3037 -3045 . DOI: 10.7527/S1000-6893.2014.0068
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