摘要
为实现某航空发动机的减重目标,开展复合材料外涵机匣结构设计。依据总体设计要求,首先通过工作环境分析,完成了材料选择。其次开展机匣结构轻量化设计,基于经典层压板理论、蔡-希尔失效准则,开发了典型层合板极限强度的VBA计算程序,完成机匣壳体的铺层方案设计;通过UG二次开发,解决了金属安装座建模困难问题,提升了结构设计效率;通过在机匣壳体内壁面铺贴热防护膜和优化“卸荷腔”排气堵头结构等措施,完成机匣热防护设计。最后,完成了机匣装配性分析及热变形分析,并通过MATLAB编程实现了发动机工作任务剖面的外部载荷确定,完成典型结构及全尺寸机匣的静强度、疲劳试验验证。相比原钛合金机匣,新设计制造的复合材料外涵机匣减重效率达到27.8%,实现了设计目标;全尺寸试验和机匣的装机应用进一步验证了结构设计的可靠性。
In order to achieve the weight reduction goal of an aero-engine,the structure design of the composite bypass casing structure was carried out.According to the overall design requirements,firstly,the working environment was analyzed and the material selection was completed.Secondly,the lightweight design of the casing structure was carried out.Based on the classic laminate theory and the Cai-Hill failure criterion,the VBA calculation program for the ultimate strength of the typical laminate was developed to complete the layering scheme design of the casing.Secondary development through UG,solved the difficult problem of metal mounting seat modeling,and improved the efficiency of structural design.Through measures such as laying a thermal protective film on the inner wall of the casing and optimizing the structure of the exhaust plug of the"unloading cavity",the thermal protection design of the casing was completed.Finally,the assembly analysis and thermal deformation analysis of the casing were completed,and the external load determination of the engine working task profile was realized through MATLAB programming,and the static strength and fatigue test verification of the typical structure and the full-size casing were completed.Compared with the original titanium alloy casing,the newly designed and manufactured composite bypass casing has a weight reduction efficiency of 27.8%,reaching the goal of design.The full-scale test and the installed application of the casing further verify the reliability of the design.
作者
刘超
吴正洪
邵红艳
林磊
马健
LIU Chao;WU Zheng-hong;SHAO Hong-yan;LIN Lei;MA Jian(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)
出处
《复合材料科学与工程》
CAS
北大核心
2022年第6期81-88,共8页
Composites Science and Engineering
基金
两机专项重大基础研究(第2批)(J2019-Ⅵ-1113-0127)。
关键词
发动机
复合材料
外涵机匣
结构设计
试验验证
aero-engine
composite material
bypass casing
structure design
verification
