S-Transform Analysis on Pulsating Water Pressure Acting on the Stop Log Gate

Abstract:

The vibration of sluice gate may lead to the damage of the hydraulic structure, based on the S-transform, the frequency and the phase distribution of the pulsating water pressure. The results show that as the water level increases, the frequency of the pulsating water pressure is small, the pulsating power acting on the bottom of the gate is decreasing, the components of frequency are rich, the power is wide, although the amplitude of frequency is decreasing, the whole power of pulsation is not changed; there is an obvious wave about the phase as the time changes, the phase distribution map is symmetry and periodically changes, and the velocity of wave may increase as the frequency increases.

• Periodical: Applied Mechanics and Materials (Volume 238)
• Pages: 282-287
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.238.282
• Online since: November 2012
• Authors: Hu Huang, Xin Yong Xu, Jian Wei Zhang
• Keywords: Phase Distribution, Pulsating Water Pressure, Stop Log Gate, S-Transform, Time Frequency Transform

References

[1] R.G. Stockwell, L. Mansinaha, R.P. Lowe, Localization of the complex spectrum the S-transform, IEEE Transactions on Signa Processing, 44 (1996) 998-1001

DOI: 10.1109/78.492555

[2] R.G. Stockwell, A basis for efficient representation of the S-transform, Digital Signl Processing, 17 (2007) 371-393.

DOI: 10.1016/j.dsp.2006.04.006

[3] K.A. Jones, P. Bernice, C. David, et al, S-transform time-frequency analysis of P300 reveals deficits in individuals diagnosed with alcoholism, Clinical Neurophysiology, 117 (2006) 2128-2143.

DOI: 10.1016/j.clinph.2006.02.028

[4] W. Qu, S. Liu, J. Wang, et al, HHT analysis of stochastic fluctuant pressure for flow-induced vibration in radial gate, Journal of Wuhan University of Technology, 28 (2006) 68-71.

[5] Y. Lei, L. Liu, X. Wei, et al, Analysis on determining maximum amplitude of model fluctuation pressure on training stoplogs gate with varying elevation intake, Journal of Hydrodynamics (A) 22 (2007) 273-277.

[6] X. Peng, H. Guo, R. Zhang, Wavelet analysis on flow fluctuating pressure acting on plunge pool slope, Journal of Hydraulic Engineering, 8 (2003) 26-31.

[7] G. Li, Z. Shen, C. Zhou, et al, An experimental study on impact pressure characteristics of self-resonant cavitating jets, Journal of Hydrodynamics (A), 9 (2003) 570-575.

[8] J. Zhang, J. Lian, H. Wang, Progress of research on backward problems of hydraulic structure dynamics induced by flow exciation, Journal of Hydraulic Engineering, 40 (2009) 1326-1322.

[9] S. Zhang, H. Huang, J. Niu, et al, Pulsating water pressure features of a stop log gate based on S-transform, Journal of Vibration and Shock, 30 (2011) 145-147.