Fig.1

Experimental piece for simplified model of typical civil aircraft

Table 1

Basic parameters of airframe model

Table 2

Basic parameters of landing gear model

Fig.2

Schematic of full-aircraft landing experiment system

Fig.3

Schematic of lifting rope of airframe

Fig.4

Position schematic of force measurement platform

Fig.5

Schematic of buffer stroke measurement

Fig.6

Schematic of high-speed cameras positioning

Fig.7

Position of marks on aircraft

Table 3

Experimental conditions of full-aircraft landing

Fig.8

Vertical ground load experiment results under different sinking speed

Fig.9

Normalized landing experiment results of full-aircraft with different sinking speeds

Fig.10

Landing experiment results of full-aircraft under different pitch angles

Fig.11

Normalized landing experiment results of full-aircraft with different pitch angles

Fig.12

Landing experiment results of full-aircraft under different roll angles

Fig.13

Normalized landing experiment results of full-aircraft with different roll angles

Fig.14

Multi-body dynamics model of landing gear

Fig.15

Landing gear buffer and tire performance parameter setting

Table 4

Material parameters

Table 5

Types and dimensions of elements of each component in airframe model

Fig.16

Airframe model

Table 6

Part of modal parameters of airframe model

Fig.17

Full-aircraft landing simulation model

Fig.18

Comparison of landing experiment and simulation results for full-aircraft

Fig.19

Vertical ground load curves at different sinking speeds

Fig.20

Buffer absorption power at different sinking speeds

Fig.21

Vertical ground load curves at different pitch angles

Fig.22

Buffer absorption power at different pitch angles

Fig.23

Vertical ground load curves at different roll angles

Fig.24

Buffer absorption power at different roll angles

Fig.25

Vertical ground load curves under different aircraft landing weights

Fig.26

Buffer absorption power under different aircraft landing weights

Fig.27

Modal analysis results of airframe with different stiffness

Fig.28

First-order vibration mode nodal lines of airframe with different stiffness

Fig.29

Vertical ground load curves of different airframe flexibility models

Fig.30

Influence coefficient of airframe flexibility on peak of vertical ground load

Fig.31

Buffer absorption power diagram of different airframe flexibility models

Fig.32

Influence coefficient of airframe flexibility on buffer absorption power

Fig.33

Influence coefficient of airframe flexibility on buffer efficiency

Fig.34

Vertical ground load curve of different airframe flexibility model at roll angle of 5°