记忆合金接头适航审查符合性方法初探
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1.中国民用航空沈阳航空器适航审定中心;2.航空工业哈尔滨飞机工业集团有限责任公司;3.沈阳航空航天大学安全工程学院

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辽宁省教育厅基金(LJKMZ20220569);民航安全能力建设基金(AADSA2021017);民航安全能力建设基金(AADSA2021018)


Preliminary Study on Conformity of Airworthiness Examination of Memory Alloy Joints
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1.Shenyang Aircraft Airworthiness Certification Center of Civil Aviation of China;2.AVIC Harbin Aircraft Industry Group Co;3.School of Safety Engineering,Shenyang Aerospace University

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    摘要:

    为提高管路系统的可靠性和维护性,形状记忆合金已在美国的大部分军机及空客、波音的多种民用机型上得到应用,如今首次应用于运12F型机并顺利通过适航审查。为促进国产形状记忆合金在国内航空器领域进一步发展,对记忆合金接头的种类、特点以及应用情况进行研究。本研究结合运12F型机进口形状记忆合金接头适航符合性验证经验,首次对国产形状记忆合金接头开展防火、爆破、耐压以及重复装配试验。满足5 min火焰作用时间、35MPa压力爆破、21MPa耐压作用、8次重复装配,表明国产记忆合金管接头与进口管接头性能相当,符合现有国外审定标准。研究确定了国产记忆合金管接头的主要失效模式及可采用的符合性方法,并依据相应符合性方法初步建立了适航验证方法,为建立国产记忆合金管接头适航审定方法和标准奠定基础。

    Abstract:

    Shape memory alloys have been applied to improve the reliability and maintainability of piping systems in various aircraft models, including most of the U.S. military aircraft and a variety of civil models of Airbus and Boeing. Recently, they were applied for the first time to the Yun12F aircraft and successfully passed the airworthiness examination. To promote the development of domestic shape memory alloys in the aircraft industry, this study examined the types, characteristics, and applications of memory alloy joints. The study incorporated airworthiness verification experience from imported shape memory alloy joints and conducted fireproof, bursting pressure resistance, and repetitive assembly tests on domestic shape memory alloy joints for the first time. It met the requirements for a 5-minute flame action time, 35MPa pressure bursting, 21MPa pressure resistance, and 8 times repeated assembly. This indicates that the performance of domestic memory alloy pipe joints is comparable to that of imported pipe joints and conforms to existing foreign validation standards. The study identifies the primary failure modes of domestic memory alloy pipe joints and proposes corresponding conformity methods. Additionally, it establishes a preliminary airworthiness validation method based on these conformity methods. This lays the foundation for the development of airworthiness validation methods and standards for domestic memory alloy pipe joints.

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  • 收稿日期:2023-07-07
  • 最后修改日期:2024-03-16
  • 录用日期:2024-03-18
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