地震载荷作用下大型球磨机止推块的抗震设计研究

Study on design of thrust blocks of large-scale ball mills with seismic loadings

为了研究大型球磨机的抗震性能,首先建立了球磨机回转体和地基基础的整体系统有限元模型;寻找地震作用最危险工况,分别以我国现行抗震设计规范和澳大利亚抗震标准作为输入激励,在有限元分析软件Nastran中得到球磨机地震加速度峰值响应;然后,以该峰值响应作为输入载荷,建立了球磨机最危险部位的有限元子模型,进一步分析该危险部位的接触强度。该分析为大型球磨机抗震结构设计及整体抗震设计提供了理论依据。

In order to study the anti-seismic performance of large-scale ball mills,the paper firstly establishes a finite element model of overall system composed of the ball mill barrel and the foundation.Then it finds the most dangerous conditions of earthquake,and respectively uses current national anti-seismic design code and Australian anti-seismic standards as the input stimulus to obtain the acceleration peak response of ball mills with seismic loadings in the finite element analysis software Nastran.In addition,the paper uses the peak response as the input loadings,establishes the finite element sub-model of the most dangerous parts of the ball mill,and further analyzes the contact strength of the dangerous parts.The analysis provides a theoretical basis for the anti-seismic structural design of large-scale ball mills and the overall anti-seismic design.