Abstract: This study presents a optimized way to improve operational-X transfer path analysis (OPAX) method accuracy, which calculating dynamic stiffness using inverse sub-structuring technology, processing measured signals by wavelet de-noising technology, and predicting loads with a neural fuzzy logic algorithm. Taking a microbus as a user example, some data were measured including the frequency response functions (FRFs) of system level and component level, the dynamic stiffness of engine mounts, and the vibration acceleration signals from incentive and response points when the microbus was running. Then the dynamic stiffness, the loads and the transfer path contributions (TPCs) were calculated using respectively the optimized and existing OPAX method, by establishing program with Matlab software. Taking the dynamic stiffness, the loads and TPCs obtained by conventional transfer path analysis method or test way as benchmarks, compared them with those calculated ones, the comparison indicates that the optimized OPAX method has higher accuracy than the existing OPAX method. This study enriches the theory of OPAX method.
莫 愁 陈吉清 兰凤崇. 扩展工况传递路径分析方法改进[J]. 振动与冲击, 2015, 34(8): 129-133.
MO Chou CHEN Ji-qing LAN Feng-chong. Optimizing the Operational-X Transfer Path Analysis Method. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(8): 129-133.
[1] Medeiror E B. The use of experimental transfer path analysis in a road vehicle prototype having independent sources[J]. SAE paper, 2008, 36: 555
[2] 郭荣,裘剡,房怀庆,等. 频域传递路径分析方法(TPA)的研究进展[J]. 振动与冲击, 2013,32(13):49-55.
GUO Rong, QIU Shan, FANG Huai-qing, et al. Advance in studying on transfer path analysis methods in frequency domain.[J]. Journal of Vibration and Shock, 2012,31(17):49-55. (in Chinese)
[3] Karl Janssens,Peter Gajdatsy, Ludo Gielen, et al. OPAX: A New Transfer Path Analysis Method Based On Parametric Load Models[J].Mechanical Systems and Signal Processing, 2010, 25(4), pp. 1321-1338.
[4] 康菲,闫硕,彭洁,等. 传递路径分析在车内噪声分析中的应用[J].汽车技术,2013.7:18-20
KANG Fei, YAN Shuo, PENG Jie, et al. Application of Transfer Path Analysis on Automotive Interior Noise Analysis[J]. Automobile Technology, 2010,3:16-19. (in Chinese)
[5] 宋海生. 基于扩展OPAX传递路径方法的轻型客车振动控制研究[D].长春:吉林大学,2012.
SONG Hai-sheng. Research on Vibration Control of Light Bus Based on Improved Operational-X Transfer Path Analysis[D]. Changchun: Jiling University, 2012. (in Chinese)
[6] Waisanen A S, Blough J R. Road Noise TPA Simplification for Improving Vehicle Sensitivity to Tire Cavity Resonance using helium gas[J]. SAE Technical Paper Series, 2009,01:2092
[7] LUI Lei. A frequency response function-based inverse sub-structuring approach for analyzing vehicle system NVH response[D]. Tuscaloosa: The University of Alabama, 2002
[8] 吕广庆,庞冬梅,周斌,等. 运输包装车辆装配系统直接与间接逆子结构动态分析方法实验验证[J].包装工程, 2012(33)19:22-25.
LV Guang-qing, PANG Dong-mei, ZHOU Bin, et al. Experimental Verification of Dynamic Analysis Method for Direct and Indirect Inverse Substructure of Assembly of Product-packaging-vehicle System[J].Packaging Engineering ,2012(33)19:22-25 (in Chinese)
[9] 吕广庆. 离散化包装耦合体动刚度的逆子结构计算方法[J]. 噪声与振动控制, 2009(2):16-18,105
LV Guang-qing. Inverse Sub-structuring Analysis of Dynamic Stiffness of Discrete Coupling Unit-of-Packaging[J]. Noise and Vibration Control, 2009(2):16-18,105 (in Chinese)
[10] BRENNER M J. Non-stationary Dynamic Data Analysis with Wavelet-SVD Filtering[J] .Mechanical System and Signal Processing,2003,17(4):765-786.