民用飛機風擋抗鳥撞的數(shù)值分析與適航技術研究
[Abstract]:Bird collision is always a hidden danger of aviation safety. With the rapid development of aviation transportation industry, bird collision problem has not been improved. The increase of aircraft flight and the increase of aircraft speed make bird collision more and more important. According to the wildlife impact database in the United States, the number of bird bumping aircraft windshield accounts for 16% of the total number of bird collisions, ranking first, so it is necessary to pay more attention to the research of windshield bird collision. At present, laminated windshield is more and more used in large civil aircraft. Compared with the single-layer windshield structure, the laminated windshield can absorb more energy, have better stability, and have better strength and stiffness under the same weight. However, the research of bird impact layer windshield is relatively few, mainly focused on the sandwich plate research. Therefore, this paper analyzes the bird impact response of the laminated windshield of a large civil aircraft, in order to provide some reference for the airworthiness validation and design of the laminated windshield of a large civil aircraft. This paper first summarizes the history of the airworthiness bird collision clause in Europe and the United States, as well as the controversy on bird weight in the relevant terms of the European and American countries in the process of development. This paper analyzes deeply the relevant articles of bird collision airworthiness verification of Chinese transport aircraft, discusses the verification method system of bird collision conformity, and provides the basis for the examination of airworthiness regulations for the analysis of bird collision problem. Secondly, several factors that need to be considered in the construction of bird collision analysis model are analyzed, including the geometric model of bird body model, constitutive model, element type, geometric model of windshield model, material and its constitutive model, windshield boundary condition. As well as impact angle, impact position, impact velocity and other bird impact conditions, to establish a suitable model for bird collision. On the basis of these two methods, a numerical analysis system of CATIA-ANS YS-DYNA joint modeling and solving is formed. In order to verify the feasibility of the system, a comparative numerical analysis is carried out on the basis of the existing bird impact test data. The finite element numerical analysis model of a large civil aircraft windshield bird collision is established on the basis of the numerical analysis method system. The impact process of the bird impact layer windshield is simulated and the force and failure mode of the laminated windshield after the bird impact is analyzed.
【學位授予單位】:南京航空航天大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:V328;V223.9
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