王旭东

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

电子邮箱:hler@dlut.edu.cn

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Investigations on the Transient Mould Friction Force in Slab Continuous Casting based on Fast Fourier Transformation

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论文类型:期刊论文

发表时间:2009-03-01

发表刊物:STEEL RESEARCH INTERNATIONAL

收录刊物:SCIE、EI、Scopus

卷号:80

期号:3

页面范围:235-240

ISSN号:1611-3683

关键字:transient friction; FFT; continuous casting; time domain; frequency domain

摘要:In continuous casting, the friction forces in the mould reflect the lubrication between the mould and slab, moreover, they affect the slab surface quality and caster productivity. In the present research the friction force is calculated by measuring the difference of working forces during HOT and COLD tests, which are carried out on the slab continuous caster equipped with hydraulic oscillators. Through analysing the mould friction using the Fast Fourier Transformation (FFT) method, the effects of mould oscillation mode and casting speed on the mould friction force are evaluated. The characteristics of the friction signal in the frequency domain are also investigated. Especially, the characteristics of friction force fluctuations before breakouts are discussed. The experimental and analytical results may contribute to more clearly understand the transient lubrication behaviour not only in the time domain but also in the frequency domain, which is also useful for the application of FFT in data analysis of mould processes.