摘要
为保证飞机航行安全,航空发动机机匣需满足包容性要求以抵抗高能碎片的冲击。针对某型航空发动机内高压压气机机匣的轻量化设计需求,基于LS-DYNA进行包容性分析,揭示了传统光壁机匣与加筋机匣的包容机理,二者均通过鼓凸塑性变形吸收叶片动能。另外,为充分挖掘加筋构型的轻量化潜力,提出一种考虑包容性能的加筋机匣优化设计框架,主要包括:提出一种机匣厚度损伤包容准则,建立结合参数化建模、有限元分析及包容性判断的优化流程,采用自主研发的优化软件Deskopt进行优化迭代并输出最优加筋机匣构型。设计结果表明,相较传统光壁机匣构型,最优加筋机匣在保证包容能力的前提下实现减重20.86%。
The aero-engine casing should satisfy the containment requirements to resist the impact of high-energy fragments in order to ensure the safety of aircraft flight.The finite element analysis of casing containment was carried out by LS-DYNA to design the lightweight configuration of high-pressure compressor casing,then the containment mechanism dominated by absorbing blade kinetic energy through bulging plastic deformation of both smooth wall casing and stiffened casing can be obtained.Furthermore,it is necessary to propose an optimal design framework of stiffened casing to fully explore the structural performance.A containment mechanism based on the damage depth of casing thickness was proposed.Then,an optimization process combining parametric modeling,numerical simulation and containment evaluation was established.The self-developed software Deskopt was used for optimization iteration and the optimal configuration was output.Results show that compared with the smooth wall casing,the optimal stiffened casing can reduce the weight by 20.86%on the premise of ensuring containment.
作者
孙燕杰
马宁
余学冉
宋志博
周才华
徐胜利
王博
SUN Yanjie;MA Ning;YU Xueran;SONG Zhibo;ZHOU Caihua;XU Shengli;WANG Bo(AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China;Key Laboratory of Ocean Energy Utilization and Engineering Mechanics,Dalian University of Technology,Dalian 116024,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第12期274-282,共9页
Journal of Vibration and Shock
基金
国家科技重大专项(J2019-IV-0019-0087)
国家自然科学基金(11825202,12102078)
中央高校基本科研业务费(DUT21GF501)。
关键词
机匣包容性
加筋结构
结构优化
数值仿真
casing containment
stiffened structure
structural optimization
numerical simulation
