Research on Stress Acoustic Model in the Process of Mechanical Self-Excited Vibration Based on Finite Element Method

Abstract:

The self-excited vibration of machinery is a common vibration in mechanical vibrations. Mechanical self-excited vibration destroys the normal working of the mechanical device and leads to mechanical fatigue damage. If the self-excited vibration reaches to the vibration frequency of machinery, it can produce the resonance and result in the scrapping of mechanical devices. The study of mechanical self-excited vibration has great significance. According to mathematical finite element methods, this paper establishes the mathematical model of the mechanical natural frequency through the finite volume method and gives the mathematical derivation formula of mechanical devices self-vibrated frequency. The second part of the paper simulates self-vibrated process of machinery using the professional software ANSYS software. First, it establishes a three-dimensional model of the mechanical device through the pre-processing module and analyzes mechanical self-excited vibration through calculation module and gets the frequency modal map of self-excited vibration process. It studies the mechanism of the mechanical self-excited vibration combining with modern signal analysis techniques--wavelet analysis. It gets the vibration source location which provides a reliable theoretical basis for the study of mechanical self-excited vibration.

• Periodical: Applied Mechanics and Materials (Volume 443)
• Pages: 189-193
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.443.189
• Online since: October 2013
• Authors: Chuan Xiong Chen
• Keywords: ANSYS Numerical Simulation, Finite Element, Frequency Power Spectra, Self-Excited Vibration, Stress Model, Wavelet Analysis

References

[1] Yaqin Chen, Hongguang Zhang, Faning Dang. Application of Daubechies conditions wavelet hybrid finite element method in beam calculations . Engineering mechanics, 2011, 28 (8): 208-214.

[2] Qiong You, Zhiyu Shi, Shaoxiang Luo. Moving force identification based on wavelet finite element . Vibration Engineering, 2010, 23 (2): 188-193.

[3] Qifeng Suo, i, Shangying Xie. Fuzzy finite element analysis of bridge structure dynamic characteristics. Highway and Transportation Research, 2010, 27 (4): 56-72.

[4] Huifen Peng, Guangwei Meng, Liming Zhou, Feng Li. Virtual crack closure based on wavelet finite element method . Jilin University (Engineering Science), 2011, 54 (5): 1364-1368.

[5] Yinan Lai, Bindi You. Yixin Song, Xianli Liu. Optimization of complex mechanical structure fuzzy finite element Journal of Harbin Institute of Technology, 2009, 41 (9): 164-168.

[6] HAMID R O, SAYYED A M, MOHAMMAD H S. Buckling analysis of laminated composite plates using higher order semi -analytical Finite Strip Method. Appl Compos Mater, 2010, 17: 69-80.

DOI: 10.1007/s10443-009-9098-2

[7] GHAFFORI E, ASGHARI M, Dynamic analysis of laminated composite platestraversed by a moving mass based on a first-order theory . Composite Structures, 2010, 92: 1865-1876.

DOI: 10.1016/j.compstruct.2010.01.011

[8] Huaiwei Ren, Guofa Wang, Xun Fan. Finite Element Analysis and Structural Improvement of Double Telescoping hydraulic support . Coal Science and Technology, 2009, 37 (12): P 71-74.