复杂载荷作用下压气机叶片疲劳寿命数值分析

摘要/Abstract

摘要： 为提高叶片服役寿命，在计算叶片应力分布并预测其在复杂载荷作用下的疲劳寿命后，基于逆向工程建立了三种不同精度的叶片模型;考虑离心和气动载荷作用，求解压气机叶片复合载荷作用下的应力分布规律;通过叶片模拟件疲劳试验，确定TC4钛合金疲劳极限，拟合寿命模型参数;利用非线性连续损伤力学模型预测叶片在典型工况下的疲劳寿命。结果表明：不同模型的应力及寿命计算值存在一定差异，开展叶片数值分析时，需考虑计算模型还原叶片几何特征的精度对计算结果的影响。

关键词: 航空发动机, 压气机叶片, 逆向建模, 复杂载荷, 疲劳寿命

Abstract: In order to improve service life of blades, three blade models were built based on reverse engineering to calculate stress distribution and fatigue life of blades under complex loadings. Considering the influence of centrifugal loads and aerodynamic loads, stress distributions of compressor blades were solved under complex loads. Moreover, the fatigue limit and life prediction model parameters were defined through the fatigue tests, and the fatigue life of compressor blades under the typical working conditions were predicted by nonlinear continuous damage model. Comparing the differences of stress values and fatigue life among three models, results show that the restoration degree of blade geometrical features for the calculation model must be considered when numerical calculations were carried out for blades with complex torsional characteristics.

Key words: aero-engine, compressor blade, reverse modeling, complex load, fatigue life

中图分类号:

V232.4

张俊红, 刘萌, 付曦, 寇海军, 林建生. 复杂载荷作用下压气机叶片疲劳寿命数值分析[J]. 中国机械工程.

ZHANG Junhong, LIU Meng, FU Xi, KOU Haijun, LIN Jiansheng. Numerical Analyses on Fatigue Life for Compressor Blades under Complex Loads[J]. China Mechanical Engineering.

参考文献

[1]陶春虎，钟培道，王仁智，等. 航空发动机转动部件的失效与预防[M]. 北京:国防工业出版社,2000:6-18.
TAO Chunhu, ZHONG Peidao, WANG Renzhi, et al. Failure Analysis and Prevention for Rotor in Aero-engine[M]. Beijing:National Defence Industry Press, 2000:6-18.
[2]石可重，赵晓路，徐建中. 重力载荷下风电叶片疲劳数值计算方法研究[J]. 太阳能学报, 2013, 34(2):181-185.
SHI Kezhong, ZHAO Xiaolu, XU Jianzhong. Research on Fatigue Numerical Calculation Method of Wind Turbine under Gravity Load[J]. Acta Energiae Solaris Sinica, 2013, 34(2):181-185.
[3]LEYLEK Z, NEELY A J. Development of a Blade Parametric Modeling Methodology for Design and Analysis of Computer Experiments [C]//ASME Turbo Expo 2015:Turbine Technical Conference and Exposition. American Society of Mechanical Engineers. Montreal， 2015：V02BT39A030.
[4]YUNZ, ZHI T C, TAO N. Reverse Modeling Strategy of Aero-engine Blade Based on Design Intent [J]. The International Journal of Advanced Manufacturing Technology, 2015, 81(9/12):1781-1796.
[5]NI K, WANG X Q, MIGNOLET M. Blade Stress Estimation during Multiple Vibratory Modes[C]//Structures, Structural Dynamics, and Materials Conferences. Boston， 2013:2013-1772.
[6]张强升. 某燃机动叶及压气机组件应力计算与振动分析[D].北京：清华大学, 2011.
ZHANG Shengqiang. Stress Calculation and Vibration Analysis of the Gas Turbine Rotor Blade and Compressor Assembly[D]. Beijing:Tsinghua University, 2011.
[7]栗玉领，徐胜利，杨树桦，等. 非典型气动荷载下压缩机叶轮疲劳强度分析[J]. 机械工程学报, 2015, 51(9):82-89.
LI Yuling, XU Shengli, YANG Shuhua, et al. Fatigue Strength Analysis of Compressor Impeller under Non-typical Aerodynamic Load [J]. Journal of Mechanical Engineering, 2015, 51(9):82-89.
[8]DHOPADE P, NEELY A J. Aeromechanical Modeling of Rotating Fan Blades to Investigate High-cycle and Low-cycle Fatigue Interaction [J]. Journal of Engineering for Gas Turbines and Power, 2015, 137(5):052505.
[9]BRANDSENJ D. Prediction of Axial Compressor Blade Vibration by Modelling Fluid-structure Interaction [D]. Stellenbosch:Stellenbosch University, 2013.
[10]陶海亮，朱阳历，郭宝亭，等. 压气机叶片流固耦合数值计算[J]. 航空动力学报, 2012, 27(5):1054-1060.
TAO Hailiang, ZHU Yangli, GUO Baoting, et al. Numerical Simulation of Aeroelastic Response in Compressor Based on Fluid-structure Coupling[J]. Journal of Aerospace Power, 2012, 27(5):1054-1060.
[11]SONG X, WANG L, NIINOMI M, et al. Fatigue Characteristics of a Biomedical β-type Titanium Alloy with Titanium Boride [J]. Materials Science and Engineering:A, 2015, 640:154-164.
[12]RABOTNOVY N, LECKIE F A, PRAGER W. Creep Problems in Structural Members[J]. Journal of Applied Mechanics, 1969, 37(1):249.
[13]CHABOCHEJ L, LESNE P M. A Non-linear Continuous Fatigue Damage Model [J]. Fatigue & Fracture of Engineering Materials & Structures, 1988, 11(1):1-17.
[14]林杰威. 涡扇发动机风扇叶片疲劳寿命评估与可靠性分析[D].天津：天津大学, 2013.
LIN Jiewei. Research on Fatigue Life Estimation and Reliability Analysis of Turbofan Engine Fan Blade[D]. Tianjin：Tianjin University, 2013.
[15]岳珠峰. 镍基单晶涡轮叶片结构强度设计[M]. 北京：科学出版社，2008:213-232.
YUE Zhufeng.Structural Strength Design of Nickel Based Single Crystal Turbine Blade[M]. Beijing:Science Press, 2008:213-232.
[16]中华人民共和国航空工业部.HB 5277-84 发动机叶片及材料振动疲劳试验方法[S]. 北京：中国标准出版社，1984.
Ministry of Aviation Industry of China, HB 5277-84 Test Method for Vibration and Fatigue of Engine Blades and Materials[S]. Beijing:Standards Press of China, 1984.