考虑土-结构相互作用的磨机-基础有限元动力分析
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摘要
为了研究磨机基础振动较大的原因及如何对基础进行有效的加固,以某矿业公司所用的磨机和基础为研究对象,首先建立磨机-基础系统的有限元模型,同时为了考虑土对结构的影响,建立了地基土的有限元模型,分别对磨机-基础系统进行了模态分析和瞬态分析。分析结果表明,该基础振动较大,有可能是由共振引起的,同时支撑主轴承座基础的刚度不足也是一个主要原因。本研究可使人们能更进一步认识半自磨机基础振动的原因和机理,为更好地设计基础和减少基础的较大振动提供有益的参考。
In order to study the reasons causing vibration of mill foundation and how to effective reinforce thefoundation, mill and foundation of a mining company served as the study object. Firstly, finite element model of the mill-foundation system was established, meanwhile, in order to consider the influence of soil to the structure, finite element model of the soil was established also. And then, modal analysis and transient analysis on the mill- foundation system was conducted respectively. The analysis results showed that the great vibration of foundation may be caused by resonance, and insufficient stiffness of foundation supporting main bearing was also a major reason. The study provided a further understanding of the causes and mechanism of the vibration of SAG mill foundation, and offered useful references for design of foundation and reduction of foundation vibration.
In order to study the reasons causing vibration of mill foundation and how to effective reinforce thefoundation, mill and foundation of a mining company served as the study object. Firstly, finite element model of the mill-foundation system was established, meanwhile, in order to consider the influence of soil to the structure, finite element model of the soil was established also. And then, modal analysis and transient analysis on the mill- foundation system was conducted respectively. The analysis results showed that the great vibration of foundation may be caused by resonance, and insufficient stiffness of foundation supporting main bearing was also a major reason. The study provided a further understanding of the causes and mechanism of the vibration of SAG mill foundation, and offered useful references for design of foundation and reduction of foundation vibration.
引文
[1]国家技术监督局,中华人民共和国建设部.GB50040—1996动力机器基础设计规范[S].北京:中国计划出版社,1997:47-50.
[2]王杰贤.动力地基与基础[M].北京:科学出版社,2001:129-179.[3]国家质量技术监督局.GB/T6075.3—2001在非旋转部件上测量和评价机器的机械振动[S].北京:中国标准出版社,2001:1-8.
[4]刘普林.地震载荷作用下大型球磨机有限元分析[D].南京:南京航空航天大学,2011:38-40.
[5]孙运会.球磨机滑履轴承的性能研究[D].南京:南京航空航天大学,2011:2-5.
[6]杨剑.新编MD Nastran有限元实例教程[M].北京:机械工业出版社,2008:43-53.
[2]王杰贤.动力地基与基础[M].北京:科学出版社,2001:129-179.[3]国家质量技术监督局.GB/T6075.3—2001在非旋转部件上测量和评价机器的机械振动[S].北京:中国标准出版社,2001:1-8.
[4]刘普林.地震载荷作用下大型球磨机有限元分析[D].南京:南京航空航天大学,2011:38-40.
[5]孙运会.球磨机滑履轴承的性能研究[D].南京:南京航空航天大学,2011:2-5.
[6]杨剑.新编MD Nastran有限元实例教程[M].北京:机械工业出版社,2008:43-53.
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