【作者】 李鑫鑫；

【导师】 魏文晖；

【作者基本信息】 武汉理工大学 ， 结构工程， 2007， 硕士

【摘要】 回转窑是个绕自身轴旋转的钢圆筒，里面砌有耐火砖，物料在其中煅烧，窑浮放在基础的托轮上，托轮可随窑转动，托轮座固定在钢筋混凝土基础上，窑的荷载经托轮传给基础。本文针对水泥厂生产过程中，回转窑设备基础振动的问题，提出了大型动力基础有限元模拟的课题。文中以实际工程项目为背景，研究回转窑—基础—地基的动力特性，由于系统的复杂性，必须要考虑回转窑和基础变形协调一致。文中论述了当前动力分析的理论，以及动力基础的研究方法，对现有的理论做了细致的分析和对比。并对回转窑基础进行了现场动力测试，在各控制点放置加速度拾振器，获取加速度时程曲线，并对其进行筛选和分析，构建有限元模型加载人工波，作为有限元模拟的动力荷载。对回转窑基础内力分析，本文做了大量工作，查阅了大量国内外关于回转窑基础设计计算相关的研究文献，详细地分析了目前国内外的研究现状和存在的不足，并针对论文所要解决的问题学习了相关的理论知识。主要是对回转窑上部结构及基础理论分析有了全面了解，详细分析了回转窑运转过程中受力及其产生原因；并且对回转窑基础的计算方法进行了探讨。将现场采集到的加速度时程曲线加载到回转窑模型上，进行时程分析。在分析中考虑回转窑正常工作、回转窑基础沉降、回转窑运转过程中托轮脱空三种情况下基础的内力分布情况。在有限元分析的基础上，开发了大型有限元软件，将有限元程序进行参数化处理，利用Visual Basic语言编写了对话框式界面，将基础类型、体系各部分几何尺寸，基础与上部设备材料组成及属性，下部地质资料等影响结构动力反应的因素设置成外部输入量，进行基础内力分析计算。通过进一步研究达到指导工程设计，优化基础各项指标，达到经济合理的目的。通过理论计算，实地工程检测和有限元模拟的分析对比，合理模拟了回转窑基础的动力反应，解决了工程设计中的一些问题，使得有限元计算结果能够在工程上辅助结构设计，应用前景广阔。更多还原

【Abstract】 The rotary kiln is rotating around its own axis of the steel cylinder ,containing a firebrick sorts, in which the burning material, Kiln floating on the basis of the supporting wheel, the wheel can rotate with the rotating kiln. The wheel is fixed with the reinforced concrete foundation, Kiln load can be passed to the foundation by the wheel. According to the vibration of the rotary kiln equipment for concrete production, the subject of finite element simulation to large-scale dynamical foundation is put forward in this article. The background is the actual project in the article. The work is on the dynamical characters of the kiln-base-foundation systems. Because of the complexity of the system, we must consider the deformation coordination of the rotary kiln and the foundation.This paper discussed the dynamic analysis principles that exist now, and the research method of the dynamic foundation. I have made a detailed analysis and comparison to the existing theory and carried on the dynamic test to the rotary kiln foundation, put the sensors at the points and then obtain the acceleration time history curve. Screen sizing and analyzing the curve, forming the artificial fluctuation, applying them as the force of the structure.In this paper, I have made a lot of work on the endogen force of the kiln’s foundation. I also have read many materials in and abroad about the civil design specification for rotary kiln foundations. Making detailed analysis of the current domestic and international situation and shortcomings. I have studied the theory of knowledge about the problems to be resolved in this paper. Having a comprehensive understanding of the kiln’s foundation and superstructure, making a detailed analysis of how the endogen force happens of kiln’s foundations, discussing the calculation method of the kiln’s foundation, loading time history analysis on the kiln model with the acceleration curve which obtained at the scene. In the analysis we considered the conditions of the normal work, the sedimentation of the foundation, the eccentric of the kiln and got the distribution of the foundation’s endogen force. On the base of the method of the finite element, we developed large-scale soft and made parameterizations of the finite element programming. With the visual basic language, we compiled window-interface, set the parameters about the physical dimensions and material properties of the equipment, the kiln’s foundation and the geology data of the understructure as the input variables. Through further research, we can achieve the following purpose: guiding the project design, optimization indicators of the kiln’s foundations, achieve reasonable economic purpose.We compared with the theoretical calculation, ground testing and finite element simulation analysis; the program can imitate the dynamic response of the kiln’s foundation. It also solved some problems of the engineering designing. The results of the finite element calculation can help the structural design of the project, so it has a bright future.更多还原