Liquid-solid coupled transient vibrations for a sink roll device of hot-dip galvanized line with an added mass
WANG Xingdong1, LIU Cancan1 , LI Yourong1, WANG Leichuan2
1. School of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China
2. Wuhan Iron and Steel Co.Ltd., Cold-Rolling Factory, Wuhan 430081,China
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.
王兴东1，刘灿灿1，李友荣1，汪磊川2. 计及附加质量的热镀锌线沉没辊装置液固耦合振动瞬态响应分析[J]. 振动与冲击, 2018, 37(7): 152-156.
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. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(7): 152-156.
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