基于相似理论的带钢热镀锌生产线冷却塔模型设计
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摘要
某钢厂带钢连续热镀锌线上的冷却塔高达60余米,结构复杂且其上设备繁多,其动特性对工艺段带钢抖动的贡献不可忽视。为了更好地研究冷却塔的动力学特性及其可能带来的对带钢抖动的影响,本文以相似理论中的π定理为基础,对冷却塔进行模型相似设计,并用LMS模态测试系统测试模型塔动态特性,结果发现,模型和原型的动力学特性基本相似,这为进一步在实验室建立抖动试验装置、更深入地研究热镀锌工艺段的带钢抖动问题提供了可靠的塔模型。
The cooling tower of a continuous hot dip galvanizing line is more than 60 meters high,with complex structure and with various equipments installed in it.The dynamic characteristics of the cooling tower have important effects on the strip vibration of the process section.In order to better reveal the effects of dynamic characteristics of the cooling tower on the strip vibration,this paper designs a model to simulate the cooling tower based on the theorem of the similarity theory.The LMS modal testing system is used to test the dynamic characteristics of the model and the prototype,and it is found that their dynamic characteristics are basically similar to each other.So a reliable tower model is obtained for a vibration testing device of the process section to investigate the strip vibration.
The cooling tower of a continuous hot dip galvanizing line is more than 60 meters high,with complex structure and with various equipments installed in it.The dynamic characteristics of the cooling tower have important effects on the strip vibration of the process section.In order to better reveal the effects of dynamic characteristics of the cooling tower on the strip vibration,this paper designs a model to simulate the cooling tower based on the theorem of the similarity theory.The LMS modal testing system is used to test the dynamic characteristics of the model and the prototype,and it is found that their dynamic characteristics are basically similar to each other.So a reliable tower model is obtained for a vibration testing device of the process section to investigate the strip vibration.
引文
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[2]张连一,何若全.设置刚臂的框架——支撑结构相似模型设计的相似条件[J].哈尔滨建筑工程学院学报,1994,27(3):7-13.Zhang Lianyi,He Ruoquan.J Harbin Archit&Civ Eng Inst,1994,27(3):7-13.
[3]陈常松,颜东煌,田仲初,等.岳阳洞庭湖大桥模型动力相似理论分析[J].桥梁建设,2002(1):48-51.Chen Changsong,Yan Donghuang,Tian Zhongchu,et al.Bridge Construction,2002(1):48-51.
[4]王均刚,马汝建.满足固有频率相似的海洋平台相似模型设计[J].西安石油大学学报:自然科学版,2007,22(1):103-106.Wang Jungang,Ma Rujian.Journal of Xi'an Shiyou University:Natural Science Edition,2007,22(1):103-106.
[5]杨俊杰.相似理论与结构模型试验[M].武汉:武汉理工大学出版社,2005.Yang Junjie.Similarity theory and structure model test[M].Wuhan:Wuhan University of Technology Press,2005.
[6]迟世春,林少书.结构动力模型实验相似理论及其验证[J].世界地震工程,2004,20(4):11-20.Chi Shichun,Lin Shaoshu.World Earthquake Engineering,2004,20(4):11-20.
[7]李德葆.振动模态分析及其应用[M].北京:宇航出版社,1989.Li Debao.Modal analysis with applications[M].Beijing:Space Press,1989.
[8]Zhu W D,Teppo L J.Design and analysis of a scaled model of a high-rise,high-speed elevator[J].Journal of Sound and Vibration,2003,264(3):707-731.
[9]Zhu W D,Chen Y.Theoretical and experimental investigation of elevator cable dynamics and control[J].Journal of Vibration and Acoustics,2006,128(1):66-78.
[10]Marcilio A,Roberto E O.Scaling the impact of a mass on a structure[J].International Journal of Impact Engineering,2006,32(7):1158-1173.
[11]成大仙等编.机械设计手册[M].5版.北京:化学工业出版社,2007.Cheng Daxian.Handbook of mechanical design[M].5th ed.Beijing:Chemical Industry Press,2007.
[12]郭月哲,童申家.钢管混凝土拱桥振动试验模型相似理论分析[J].交通科技与经济,2010(5):73-76.Guo Yuezhe,Tong Shenjia.Technology&Economy in Areas of Communications,2010(5):73-76.
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