飞机结构强度试验应急载荷限定系统

doi:10.7527/S1000-6893.2019.23332

Abstract

Abstract: The number of main landing gears for multi-wheels and multi-struts landing gear aircraft is large, and the test machine and test equipment are heavy. During the test emergency unloading, the weight of test pieces and equipment, as well as the inconsistencies in the rapid release of the accumulated energy generated by the deformation of test pieces during the loading process, are likely to produce a large impact load on the support point structure. And the uncontrollable load will affect the test assessment, exposing potential safety hazards. A load limited system is designed to meet the strength test requirements of multi-wheels and multi-struts landing gear aircraft. In emergency unloading or test pause, the proposed system can set a load for the non-support landing gear, ensuring that all generated loads are assigned to all landing gears as required to prevent overloading of the support in the emergency moment. During the test, the test active load can be applied to non-support landing gear. The feasibility of the system principle is verified by simulation software. Based on the system principle, the load limited system is designed, and its structure and performance are verified. And the application debugging is carried out in the whole machine fatigue test of a certain type of aircraft. The results show that the system can fully meet the test requirements.

Key words: multi-wheels and multi-struts, emergency unloading, load limit, aircraft structural strength, fatigue test

CLC Number:

V216.3

WANG Xintao, DU Xing. Emergency load limited system for aircraft structural strength test[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(2): 223332-223332.

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Emergency load limited system for aircraft structural strength test

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