Liquid-solid coupled transient vibrations for a sink roll device of hot-dip galvanized line with an added mass

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 152-156.

WANG Xingdong1, LIU Cancan1 , LI Yourong1, WANG Leichuan2

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Abstract

The coating quality of steel strip is seriously influenced by vibration of a sink roll immersed in molten zinc. It is necessary to study a sink roll’s liquid-solid coupled vibration. Based on the theoretical method of added mass, a mathematical model for the roll’s transient vibration responses considering effects of flow field was established. The on-line vibration tests for the roll were conducted. Combining the roll’s wet and dry modal analysis results, the added mass value was determined. According to the structural characteristics of the sink roll, the mass matrix of the mathematical model was modified, the numerical analysis model for the roll’s transient responses considering effects of flow field was established. The results of numerical simulation showed that the principal vibration frequencies in 3 directions of the model are close to the measured data, the effectiveness of the proposed method for liquid-solid coupled transient response analysis of the sink roll with an added mass is verified; based on this model, the transient responses of key regions including the contact surface between bearing and journal are obtained.

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liquid-solid coupled vibration / transient response / added mass / modal analysis

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WANG Xingdong1, LIU Cancan1,LI Yourong1, WANG Leichuan2. Liquid-solid coupled transient vibrations for a sink roll device of hot-dip galvanized line with an added mass[J]. Journal of Vibration and Shock, 2018, 37(7): 152-156

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