Updating technology based on uncorrelated mode shapes
-
摘要: 为充分利用试验测量结果,探讨了一种修正技术,不但有效利用试验数据中与有限元模型相关的模态信息,同时也有效利用不相关模态信息,并成功应用于某型现代高推质比涡扇发动机结构中.通过计算,修正后的模型计算值与试验测试值比较接近,误差接近0,MAC(model assurance criteria)值接近1.研究表明:利用不相关模态振型的模型修正技术能够有效得到准确的修正参数值,且修正后的有限元模型具有很高的计算精度.Abstract: In order to make full use of the test measurement results, a method of FE (finite element) model updating with adoption of both correlated and uncorrelated modes for updating was put forward, and successfully applied in a certain type of modern high thrustweight ratio turbofan engine. The calculated values of the modified model were close to the test values by the correction calculation. The error was close to 0 and the MAC (model assurance criteria) value close to 1. Result showed that, the proposed method was found to successfully update an FE model yielding correct estimates of the updating parameters in the presence of uncorrelated modes, and the updated FE model had a high calculation precision.
-
[1] Friswell M I,Mottershead J E.Finiteelement model updating in structural dynamics[M].Berlin:Springer Netherlands,1995. [2] ZapicoValle J L,AlonsoCamblor R,GonzálezMartínez M P,et al.A new method for finite element model updating in structural dynamics[J].Mechanical Systems and Signal Processing,2010,24(7):2137-2159. [3] 朱跃.基于分层思想的复杂机械结构模型修正及确认技术研究[D].南京:南京航空航天大学,2010. ZHU Yue.Study onmodel updating and validation technology of complex mechanical structure based on hierarchical method[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2010.(in Chinese) [4] Berman A,Flannelly W G.Theory of incomplete models of dynamic[J].AIAA Journal,1971,9(8):1481-1487. [5] Collins J D,Hart G C,Haselman T K.Statistical identification of structure[J].AIAA Journal,1974,12(2):185-190. [6] Mottershead J E,Friswell M I.Model updating in structural dynamics:a survey[J].Journal of Sound and Vibration,1993,167(2):347-375. [7] Ahmadian H,Gladwell G M L,Ismail F.Parameter selection strategies in finite element model updating[J].Journal of Vibration and Acoustics,1997,119(1):37-45. [8] Mares C,Mottershead J E,Friswell M I.Results obtained by minimizing naturalfrequency errors and using physical reasoning[J].Mechanical Systems and Signal Processing,2003,17(1):39-46. [9] Marwala T,Sibisi S.Finite element updating using bayesian framework and modal properties[J].Journal of Aircraft,2005,42(1):275-278. [10] Modak S V.Model updating using uncorrelated modes[J].Journal of Sound and Vibration,2014,333(11):2297-2322. [11] 张令弥.动态有限元模型修正技术及其在航空航天结构中的应用[J].强度与环境,1994(2):10-17. ZHANG Lingmi.Dynamic finite element model updating and its application in aerospace structures[J].Structure and Environment Engineering.1994(2):10-17.(in Chinese) [12] 马双超,臧朝平,兰海波.某航空发动机机匣的动力学模型修正[J].航空动力学报,2013.28(4):878-884. MA Shuangchao,ZANG Chaoping,LAN Haibo.Dynamic model updating of an aeroengine casing[J].Journal of Aerospace Power,2013,28(4):878-884.(in Chinese) [13] 王永华,杨欣毅,苏珉,等.熵判别粒子群优化算法在发动机模型修正中的应用[J].航空动力学报,2013,28(1):74-81. WANG Yonghua,YANG Xinyi,SU Min,et al.Engine model correction based on entropy criterion PSO[J].Journal of Aerospace Power,2013,28(1):74-81.(in Chinese) [14] ZHAI Xue,ZHAI Qinggang,WANG Jianjun.Dynamic model updating for bolted flange joints in the pipe structure[R].Sanya,China:International Conference on Simulation and Modeling Methodologies,Technologies and Applications,2014. [15] 艾延廷,翟学,乔永利.基于有限元法的螺栓连接结构模态参数识别[J].中国机械工程,2012,8(23):957-960. AI Yanting,ZHAI Xue,QIAO Yongli.Identification of bolt connected structure modals based on FEM[J].China Mechanical Engineering,2012,8(23):957-960.(in Chinese) [16] ZHAI Xue,ZHAI Qinggang,WANG Jianjun,et al.Modeling and updating for bolted joints structure in aeroengine stator system[J].Journal of Propulsion Technology,2015,36(3):450-457. [17] Ren W X,Chen H B.Finite element model updating in structural dynamics by using the response surface method[J].Engineering Structures,2010,32(8):2455-2465. [18] ZANG Chaoping,Ewins D J.Model validation for structural dynamics in the aeroengine design process[J].Frontiers of Energy and Power Engineering in China,2009,3(4):480-488. [19] 马双超.航空发动机机匣模型确认与动力学特性研究[D].南京:南京航空航天大学,2012. MA Shuangchao.Structure dynamic analysis and model validation of aeroengine casings[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2012.(in Chinese) [20] LIU Shuguo,WANG Jun,HONG Jie,et al.Dynamics design of the aeroengine rotor joint structures based on experimental and numerical study[R].Glasgow UK:ASME Turbo Expo,2010. [21] ZHAI Xue,ZHAI Qinggang,WANG Jianjun,et al.Research on parameterized modeling technology for the bolted joints structure[R].Bangkok,Thailand:International Conference on Aerospace and Mechanical Engineering,2014.
点击查看大图
计量
- 文章访问数: 778
- HTML浏览量: 2
- PDF量: 422
- 被引次数: 0