Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (9): 1273-1278.DOI: 10.12068/j.issn.1005-3026.2019.09.011

• Materials & Metallurgy • Previous Articles     Next Articles

Resonance Analysis of Non-sinusoidal Oscillations of Continuous Casting Mold

MENG Xiang-ning, CUI Yu, LYU Ze-sheng, PENG Xiu-xing   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2018-09-05 Revised:2018-09-05 Online:2019-09-15 Published:2019-09-17
  • Contact: MENG Xiang-ning
  • About author:-
  • Supported by:
    -

Abstract: According to the harmonic resonance theory, when the continuous casting mold is non-sinusoidal oscillation and the vibration frequency is lower than the natural frequency of the oscillator in the mold, partial harmonics with a higher amplitude can lead to resonance because the harmonic frequencies is an integer multiple of the oscillation frequency, which can directly affect the quality of slab. Using Fourier transformation, the acceleration curve of non-sinusoidal oscillation of the mold is analyzed and the relationships between harmonic amplitude and other factors, such as initial amplitude, oscillation frequency, non-sinusoidal oscillation factor and harmonic order are obtained. Then, a theoretical method of restraining resonance can be given. When the natural frequency of the oscillator in the mold is known, the harmonic order of resonance under different oscillation frequencies is determined. The harmonic amplitude corresponding to the combination of different oscillation parameters can be given by the relationship between the harmonic amplitude and the variation of each oscillation parameter. Consequently, selecting an oscillation parameter combination with a smaller harmonic amplitude can reduce the adverse effect of resonance phenomenon on the oscillator in the mold, resulting to reduce the deflection of mold, maintain liquid level stabilizing and improve the working conditions of continuous casting machine.

Key words: continuous casting, mold, non-sinusoidal oscillation, resonance, harmonic analysis

CLC Number: