Structure Design Of The Amphibious Aircraft Ground System And Related Mechanical Property Analysis

Amphibious aircraft, a new kind of vehicle that can both run on the ground and flyin the air, will be widely used in many areas such as urban transportation, emergencyrescue and military transportation. The vertical take-off and landing flying car with ductpropeller exceeds other amphibious aircrafts in its unique flight performance. Theresearch on flying car covers many areas like overall structure design, ground drivingsystem, air posture control, power system, etc. It involves many disciplines such asmechanism, kinematics, structural dynamics, aerodynamics, information technology andautomatic control.Firstly, the overall design of flying car has been completed preliminarily, accordingto the design of ordinary and electric cars and the characteristics of ducted structure. Theprinciple, the performance and structural parameter, the general layout of the flying carhave been determined, and then the3D model of its body is built. This work laysfoundation for the subsequent detailed design.Secondly, based on aerodynamic theory and numerical simulation method, theaerodynamics performance (such as the elevating force of main duct, the impetus ofpromoted duct and the body pitching moment) while running on the ground andhovering in the air has been studied. The validation of the flying car under both movingmodes has been verified.Thirdly, the detailed design of suspension which determines the ground drivingperformance has been completed and then the3D model of suspension is built. Ananalytic method based on motion synthesis has been provided to check its positionparameters. Its results have been compared with ADAMS results, which proves itsaccuracy. Also, some of position parameters have been optimized.Finally, based on flexible-multi-body dynamics theory and numerical simulationmethod, the rigid-flexible coupled multi-body dynamic model of suspension has beenbuilt. Its dynamic response of the road excitation in the state of the normal cement roadand the country road, and that of the impact load in landing process have been analysedrespectively. The strength of the suspension has also been checked.