Landing gear shimmy is an important issue in modern civil aircraft development and airworthiness certification. For the complex nose landing gear of a civil aircraft, the three-dimensional(3D) simplified dynamic model is developed and shimmy characteristic parameters of the rigid-flexible coupling structures are obtained under different simulated shimmy flight test scenarios-typical taxing speed, weight/center of gravity and runway plank excitation. The landing gear stability in normal configuration is validated. The influence of the shimmy damping, tire relaxation length and cornering stiffness on the stability is analyzed respectively. Interpretation and induction of applicable Chinese Civil Aviation Regulations for shimmy, besides landing gear shimmy airworthiness certification practice are illustrated. A reasonable airworthiness verification and certification "Building Block Model", which includes airworthiness requirements capture, simulation, virtual test and test (equipment qualification test, landing gear system laboratory test and shimmy flight test), is proposed. The civil aircraft shimmy case study demonstrates the feasibility of virtual verification technology to assist the shimmy compliance finding.
HE Xufei
,
AI Jianliang
,
SONG Zhitao
. Shimmy Simulation and Virtual Verification for Civil Aircraft Landing Gear Airworthiness Certification[J]. Journal of Mechanical Engineering, 2018
, 54(14)
: 179
-184
.
DOI: 10.3901/JME.2018.14.179
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