摘要
针对某高涵道比涡扇发动机高压压气机机匣的设计需求,采用有限元方法,从静力学角度出发,根据温度载荷和气动载荷求解机匣的温度场和压力场分布,分析机匣的应力和变形分布,以及椭圆度;从动力学角度出发,根据机匣的固有频率,结合各级转子叶片数目及工作转速,分析机匣的共振频率,从以上两方面对机匣强度振动特性进行计算分析与评估。研究结果表明:在温度场载荷和气动载荷作用下,机匣具有足够的强度储备系数;机匣共振的安全裕度满足动力学设计要求。
Focused on the demands of the high pressure compressor in the high pass ratio aero engine, finite element method was employed to evaluate the strength and vibration characteristics of the case component. The distributions of air pressure and temperature field of the case component were obtained through the aerodynamic and thermodynamic method. These loads were used during the static analysis on the case component. By considering the effects of the number of blades and the operating speed, the resonance vibrating of the case component was investigated based on the dynamic characteristics. According to the above analysis, the case component has sufficient strength redundancy in the environment of high temperature and high pressure. The safety margins of the casing resonant satisfy the requirement of the dynamical design.
出处
《南昌航空大学学报（自然科学版）》
CAS
2015年第2期21-26,86,共7页
Journal of Nanchang Hangkong University(Natural Sciences)
关键词
航空发动机
机匣
有限元
强度
共振分析
aero engine
casing
finite element method
strength
resonance analysis
