Special Issue on Advances on Numerical Methods for Engineering Problems; Guest Editors: Guiyong Zhang and Xiangyang CuiNo Access

Random Vibration Analysis for Impellers of Centrifugal Compressors Through the Pseudo-Excitation Method

Yuefang Wang

Department of Engineering Mechanics, Dalian University of Technology, State Key Laboratory of Industrial Equipment, Dalian, P. R. China, Dalian, Liaoning 116024, P. R. China

Corresponding author.

Search for more papers by this author

Sujing Wang

XCMG Xuzhou Truck-Mounted Crane Co., LTD, 55 Tuolanshan Road, Xuzhou Economic Develop Zone, Jiangsu 221004, China

Search for more papers by this author

, and

Lihua Huang

Faculty of Construction and Infrastructures, Dalian University of Technology, Dalian, Liaoning 116024, P. R. China

Search for more papers by this author

https://doi.org/10.1142/S0219876215400022Cited by:6 (Source: Crossref)

Abstract

Impellers of centrifugal compressors are generally loaded by fluctuating aerodynamic pressure in operations. Excessive vibration of the impellers can be induced by unsteady airflows and lead to severe fatigue failures. Traditional transient stress analyses implemented in time domain generally require multiple load-step, very time-consuming computations using input of temporal pneumatic force previously obtained from Computational fluid dynamics (CFD) analyses. For quick evaluation of structural integrity of impellers, it is necessary to develop random vibration models and solution approaches defined in frequency domain. In this paper, the Pseudo-Excitation Method (PEM) is used to obtain power spectral density of three-dimensional, dynamic displacement and stress of impellers. A finite element model of an unshrouded impeller of a centrifugal compressor is generated based on the result of unsteady CFD analysis. Compared with the direct transient stress analyses in time domain, the pseudo-excitation method provides accurate and fast estimation of dynamic response of the impeller, making it an applicable and efficient method for analyzing random vibration of impellers.

Keywords:

Remember to check out the Most Cited Articles!
Check out these titles in finite element methods!

References

A. Beckert and H. Wendland , Aerosp. Sci. Technol. 5 , 125 ( 2001 ) . Crossref, Web of Science, Google Scholar
A. Bianchini et al. , J. Eng. Gas. Turb. Power 135 , 112502 ( 2013 ) . Crossref, Web of Science, Google Scholar
C. Bludszuweit , Artif. Organs 19 , 590 ( 1995 ) . Crossref, Web of Science, Google Scholar
A. de Boer , A. H. van Zuijlen and H. Bijl , Comput. Methods in Appl. Mech. Eng 196 , 1515 ( 2007 ) . Crossref, Web of Science, Google Scholar
R. Cooket al., Concepts and Applications of Finite Element Analysis, 4th edn. (Wiley, New York, 2001). Google Scholar
H. Z. Ernesto and E. H. Vanmarcke , ASCE J. Eng. Mech 120 , 1107 ( 1994 ) . Crossref, Web of Science, Google Scholar
G. Housner , B. Seism. Soc. Am. 37 , 17 ( 1947 ) . Google Scholar
S. Khelladi et al. , P. I. Mech. Eng A–J Pow 224 , 691 ( 2010 ) . Web of Science, Google Scholar
A. D. Kiureghian and A. Neuenhofer , Earthquake Eng. Struc. 21 , 713 ( 1992 ) . Crossref, Web of Science, Google Scholar
A. H. Lerche et al. , Proc. ASME Turbo Expo 6 , 191 ( 2012 ) . Google Scholar
Li, C. [2012] "Fracture of blade analysis and aerodynamically unsteady pulsation of flow," Master Degree Thesis, Dalian University Technology . Google Scholar
J. Lin , Y. Zhao and Y. Zhang , Comput. Methods Appl. Mech. Eng. 191 , 103 ( 2001 ) . Crossref, Web of Science, Google Scholar
J. Lin and Y. Zhang , Pseudo Excitation Method for Random Vibrations ( Science Press , Beijing , 2004 ) . Google Scholar
G. Liśkiewicz et al. , Exp. Therm. Fluid Sci. 54 , 267 ( 2014 ) . Crossref, Web of Science, Google Scholar
O. Z. Mehdizadeh , C. Zhang and F. Shi , Flow-induced vibratory stress prediction on small turbofan engine compressor vanes using fluid-structure interaction analyses , The 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conf. and Exhibition ( 2008 ) . Google Scholar
NUMECA International [2000] NUMECA IGG TM/AutoGrid TM User Manual. NUMECA International, Brussels . Google Scholar
Y. K. P. Shum , C. S. Tan and N. A. Cumpsty , J. Turbomach. 122 , 777 ( 2000 ) . Crossref, Web of Science, Google Scholar
M. Tootkaboni and L. Graham-Brady , Prob. Eng. Mech. 25 , 163 ( 2010 ) . Crossref, Web of Science, Google Scholar
Y. F. Wu , Y. F. Wang and X. H. Sun , Fan Machines Technol. 3 , 34 ( 2012 ) . Google Scholar
A. Zemp , A. Kammerer and R. S. Abhari , J. Turbomach 132 , 031015–1 ( 2010 ) . Crossref, Web of Science, Google Scholar