高负荷弯掠叶片力学模型与应力抑制研究

推进技术 ›› 2016, Vol. 37 ›› Issue (8): 1551-1559.

高负荷弯掠叶片力学模型与应力抑制研究

马艳红^1,2,曹冲¹,张大义¹,张蓟欣¹,洪杰^1,2

北京航空航天大学能源与动力工程学院，北京 100191; 先进航空发动机协同创新中心，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191; 先进航空发动机协同创新中心，北京 100191

发布日期:2021-08-15
作者简介:马艳红，女，博士，副教授，研究领域为发动机整机动力学。

Mechanical Modeling and Stress Suppression on

School of Energy and Power Engineering，Beihang University，Beijing 100191，China; Collaborative Innovation Center of Advanced Aero-Engine，Beijing 100191，China,School of Energy and Power Engineering，Beihang University，Beijing 100191，China,School of Energy and Power Engineering，Beihang University，Beijing 100191，China,School of Energy and Power Engineering，Beihang University，Beijing 100191，China and School of Energy and Power Engineering，Beihang University，Beijing 100191，China; Collaborative Innovation Center of Advanced Aero-Engine，Beijing 100191，China

Published:2021-08-15

摘要/Abstract

摘要： 几何构型对叶片应力的影响规律是高负荷弯掠叶片应力优化的关键。建立了带有弯掠与扭曲结构特征参数的叶片力学模型，研究了掠形与扭转构型对叶片应力分布的影响。结果表明:弯掠造成的附加弯矩与叶型截面形心位置紧密相关，弯曲应力极值可能出现在叶型前缘、尾缘和叶背中部三个区域；扭转造成的附加扭矩的大小由叶尖到叶根逐渐增加，在叶片自然扭曲率较小时，附加扭矩为负方向，其作用致使叶片解扭；对于典型弯掠叶片，其离心力作用下的径向力载荷决定着自身的截面平均应力水平，而附加弯矩和扭矩载荷决定着截面的应力分布形式。在给定的叶型条件下，可通过掠形方式的调整使附加弯矩与扭矩相抵消，降低叶片峰值应力30%以上。

关键词: 弯掠叶片；结构特征参数；离心载荷；附加力矩；应力分布

Abstract: The rules of effects of configuration on blade stress are key to high loading swept blade stress optimization. A mechanical model of blade with characteristic parameters of sweep and torsion was constructed. Effects of blade sweep and torsion on stress distribution were studied. It turns out that the additional moment caused by sweep is closely related to the location of blade section centroid. Extreme moment is most likely to appear in the leading and trailing edge of the blade profile and the middle of the suction surface. The additional torque caused by torsion gradually increases from blade tip to root. The torque turns negative when the torsion ration is small and it decreases the blade torsion. For typical swept blade，the stress level is mainly determined by the radial force while the stress distribution is determined by the additional moment and torque. In certain blade profile condition，the effects of additional moment and torque could be offset by sweep configuration modification，and the peak value of the stress could be reduced by more than 30%.

Key words: Swept blade；Characteristic parameter；Centrifugal load；Additional moment；Stress distribution

马艳红,曹冲,张大义,张蓟欣,洪杰. 高负荷弯掠叶片力学模型与应力抑制研究[J]. 推进技术, 2016, 37(8): 1551-1559.

MA Yan-hong^1,2,CAO Chong¹,ZHANG Da-yi¹,ZHANG Ji-xin¹,HONG Jie^1,2. Mechanical Modeling and Stress Suppression on[J]. Journal of Propulsion Technology, 2016, 37(8): 1551-1559.

参考文献

[1] 桂幸民, 周拜豪. 压缩系统跨音进口级弯掠叶片空气动力学概述[J]. 航空动力学报, 1995, 10(4): 407-411.
[2] 魏兵海, 吴克启. 高性能弯掠叶片及其对内流影响的研究概况[J]. 流体机械, 2001, 29(1): 31-34.
[3] 梁春华. 国外风扇/压气机掠形叶片技术的发展[J]. 航空发动机, 2000, (4): 48-51.
[4] 王振培, 王丹, 朱继宏, 等. 叶片参数化有限元建模与罩量优化设计[J]. 航空动力学报, 2012, 26(11): 2450-2458.
[5] 王咏梅, 陈葆实. 罩量调节对风扇/压气机气动性能和强度影响的研究[J]. 航空发动机, 2000, (1): 6-11.
[6] 张正秋, 邹正平, 刘宝杰. 高负荷风扇叶片重心线调节对叶片强度和气动性能的影响分析[J]. 航空学报, 2006, 27(3): 380-385.
[7] Velazquez A, Swartz R A. Damped Gyroscopic Effects and Axial-Flexural-Torsional Coupling Using Spinning Finite Elements for Wind-Turbine Blades Characterization[J]. Sensors & Smart Structures Technologies for Civil Mechanical & Aerospace Systems, 2013, 8692(5): 1-16.
[8] Patel P D, Patel D. An Analysis and Optimization of Mechanical Properties to Prolonged Service Life of Horizontal Axis Wind Turbine Blade[J]. International Journal for Scientific Research and Development, 2014, 1(6): 152-157.
[9] Qiao Y, Han J, Zhang C, et al. Finite Element Analysis and Vibration Suppression Control of Smart Wind Turbine Blade[J]. Applied Composite Materials, 2012, 19(3-4): 747-754.
[10] Pedersen H B, Kristensen O J D. Applied Modal Analysis of Wind Turbine Blades[R]. Ris?-R-1388(EN), 2003.
[11] Kim J E, Sarigul-Klijn N. Elastic-Dynamic Rotor Blade Design with Multiobjective Optimization[J]. AIAA Journal, 2001, 39(9): 1652-1661.
[12] 张蓟欣, 徐雷, 张大义, 等. 基于积叠线设计的弯掠叶片静强度优化方法[J]. 推进技术, 2014, 35(4): 544-551. (ZHANG Ji-xin, XU Lei, ZHANG Da-yi, et al. Optimization Method for Static Strength of Swept-Curved Blade Based on Stacking Line Design[J]. Journal of Propulsion Technology, 2014, 35(4): 544-551.)
[13] 杨剑秋, 王延荣. 空心风扇叶片结构优化设计方法及程序实现[J]. 航空动力学报, 2012, 27(1): 97-103.
[14] 杨剑秋, 王延荣. 基于正交试验设计的空心叶片结构优化设计[J]. 航空动力学报, 2011, 26(2): 376-384.
[15] 周正贵. 压气机/风扇叶片自动优化设计的研究现状和关键技术[J]. 航空学报, 2008, 29(2): 257-266.
[16] 尹泽勇. 航空发动机设计手册, (第 18 册)[M]. 北京: 航空工业出版社, 2001.
[17] 康传明, 张卫民. 利用掠-扭耦合效应降低风电机组叶片载荷的研究[J]. 风能, 2010, (8): 58-60.(编辑:张荣莉)　　　　　　　　　　　　　*　收稿日期:2015-04-22；修订日期:2015-06-09。作者简介:马艳红,女,博士,副教授,研究领域为发动机整机动力学。E-mail: mayanh2002@163.com