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  

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

作　　者：王兴东[1] 刘灿灿 李友荣[1] 汪磊川[2] WANG Xingdong;LIU Cancan;LI Yourong;WANG Leichuan(School of Machinery and Automation,Wuhan University of Science and Technology,Wuhan 430081,China;Cold-Rolling Factory,Wuhan Iron and Steel Co.Ltd.,Wuhan 430081,China)

机构地区：[1]武汉科技大学机械自动化学院,武汉430081 [2]武汉钢铁股份有限公司冷轧总厂,武汉430081

出　　处：《振动与冲击》2018年第7期152-156,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51175387)

摘　　要：浸没于锌液中的沉没辊振动会严重影响带钢的镀层质量,迫切需要开展这类液固耦合振动问题的研究。基于附加质量的理论方法,建立了考虑流场作用的瞬态响应数学模型;进行了在线振动试验研究,结合结构的干湿模态分析结果,确定了附加质量;针对沉没辊结构特征,修正了数学模型的质量矩阵,建立了考虑流场作用的瞬态响应数值分析模型。瞬态模拟计算结果发现模型三个方向的主振频率与实测数据接近,验证了提出的计及附加质量液固耦合振动瞬态响应分析方法的有效性;基于该模型,得到了轴瓦与轴颈接触面等关键区域的瞬态响应。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.

关 键 词：液固耦合振动 瞬态响应 附加质量 模态分析 

分 类 号：TH113.1[机械工程—机械设计及理论]