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王典,黄尚友,阚玉平,等. 飞机发动机安装系统隔振设计及振动特性分析[J]. 科学技术与工程, 2020, 20(20): 7991-7995.
Wang Dian,et al.Vibration Isolation Design and Vibration Characteristics Analysis of the Installation System for Aircraft Engine[J].Science Technology and Engineering,2020,20(20):7991-7995.
飞机发动机安装系统隔振设计及振动特性分析
Vibration Isolation Design and Vibration Characteristics Analysis of the Installation System for Aircraft Engine
投稿时间:2020-01-10  修订日期:2020-03-27
DOI:
中文关键词:  涡扇发动机安装系统 振动解耦 隔振设计 静刚度
英文关键词:installation system for turbofan engine vibration decoupling vibration isolation design static stiffness
基金项目:
           
作者单位
王典 西安飞机工业(集团)有限责任公司西飞设计院
黄尚友 西安飞机工业(集团)有限责任公司西飞设计院
阚玉平 西安飞机工业(集团)有限责任公司西飞设计院
房静 西安飞机工业(集团)有限责任公司西飞设计院
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中文摘要:
      针对航空发动机振动值过大导致飞机总体振动水平过高等问题,以某型飞机涡扇发动机安装系统为研究对象,为提高其隔振性能,对安装系统进行六自由度隔振设计,并分析其振动特性。基于弹性中心理论及能量解耦原理,以发动机隔振器三轴静刚度为设计参数,对安装系统固有频率和解耦率进行优化配置,为隔振器的结构设计提供了参数输入,并研究了六自由度振动传递率,验证其隔振效果。结果表明:发动机安装系统前六阶固有频率均在50Hz以下,固有频率分配合理,各向解耦率均达到85%以上,在发动机一阶固有频率处(150Hz)处各向振动传递率均接近于0,发动机安装系统隔振设计满足系统技术要求,验证了设计方法的有效性。
英文摘要:
      For the problems that excessive engine vibration value result in high vibration level of the aircraft, 6-DOF(six-degrees-of-freedom) space vibration isolation design of the installation system for turbofan engine is carried out in order to improve its vibration isolation performance, and its vibration characteristics are analyzed. Taking the three-dimensional static stiffness of four isolators as designed variables, the frequency and decoupling ratios of the mounting system are optimized to define parameter input for the isolators’ structural design in view of elasticity center theory and energy decoupling principle, and 6-DOF vibration transmissibility is researched to test vibration isolation effect. The results show that its natural frequencies are all below 50Hz, the decoupling ratios in all directions achieve above 85%, and the vibration transmissibility in all directions is close to 0 at the first natural frequency for the engine(150 Hz), consequently indicate that vibration isolation design of engine mounting system cater to the technical requirements of the system well, which verify the effectiveness of design methods.
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