门式斗轮堆取料机金属结构分析及优化

发布时间：2018-06-03 04:25

本文选题：门式斗轮堆取料机 + 有限元　；参考：《吉林大学》2012年硕士论文

【摘要】：MDQ1250/1250.50型门式斗轮堆取料机属于大型复杂钢结构，主要工作在大型水利工地等工矿企业的储料场，用于火力发电。是高效连续堆取散装物料的理想设备。该机主体结构由刚性腿、柔性腿、活动梁、固定梁、端梁、起升机构、斜升胶带机、斗轮机、取料胶带机、移动胶带机、司机室、主机梯子平台、电气系统、洒水装置等组成。模型的理论设计阶段已经完成，现在我们要运用CAE(ComputerAidedEngineering)商业软件对其进行有限元分析，确保设备的可靠运行。我们主要针对金属结构进行计算校核，主要包括：强度计算及校核、刚度计算及校核、稳定性计算及校核以及特殊部件的校核，发现设计不合理之处，为厂方提供修改方案进行设备优化，并为其设计提供理论依据。由于本项目设计工作采用的是AutoCAD软件，与有限元分析软件不存在数据接口，所以我们只能够根据厂方提供的图纸手工建立计算模型。本论文主要采用有限元分析方法对设备的金属结构部分进行静力计算及分析。在该项目中的建模部分以及计算分析过程都是在Pro/Engineer软件中完成。这款设计分析软件功能非常强大，并且Pro/E的建模和分析模块可以无缝连接，即可以直接进入Pro/Mechanica进行有限元分析计算，它可以进行全局参数化驱动，并且有数据相关性，即建模时的尺寸修改可以直接修改有限元模型。在有限元分析计算的过程中的难点在于模型的链接处理，并且进行整机分析，模型的规模也很大，因此要进行合理的模型简化，达到计算效率和结果精度的平衡。在此基础之上我们还对整机进行了模态分析，通过计算十阶固有频率与外部激励的频率进行对比来判断结构是否会发生共振而导致现场事故。经过我们的计算，通过对计算结果的分析我们针对整个结构的设计提出了一些改进方案，以此满足计算要求，保证现场工作的安全。同时还对刚性支腿进行了质量优化设计研究，虽然在质量优化设计中还有很多因素没有考虑，但是对以后的设计及后续改进提供了一定的参考依据。通过该项目的计算，可以更加深刻的了解到CAE技术在生产实际中的重要地位，CAE不需要样品才能分析，只要有数模就可以，这样在生产样品之前就可以做仿真，做若干的修改，得到一个较好的方案，然后再进行样品生产，批量生产。CAE重要的就是要算得准，否则也就没有意义了，对外界条件而言，需要有好的软件以及具有强大运算能力的计算机；对人而言，，这需要较强的软件操作能力，深厚的理论知识，以及丰富的经验。CAE技术在很多方面都有应用，为工程实际做出了巨大贡献。
[Abstract]:MDQ1250/1250.50 type door bucket wheel stacker is a large and complex steel structure which mainly works in the material storage fields of large water conservancy sites and other industrial and mining enterprises and is used for thermal power generation. It is an ideal equipment for high efficiency and continuous stacking of bulk materials. The main structure of the machine is composed of rigid leg, flexible leg, movable beam, fixed beam, end beam, lifting mechanism, inclined belt conveyor, bucket wheel machine, tape taker, moving tape machine, driver's room, main engine ladder platform, electrical system, sprinkler, etc. The theoretical design stage of the model has been completed, and now we need to use the commercial software of CAEX computer aided Engineering to analyze the finite element method to ensure the reliable operation of the equipment. We mainly carry out calculation and check for metal structure, mainly include: strength calculation and check, stiffness calculation and check, stability calculation and check and special parts check. To provide the modification scheme for the equipment optimization, and to provide theoretical basis for its design. Because the AutoCAD software is used in the design of the project and there is no data interface with the finite element analysis software, we can only build the calculation model manually according to the drawings provided by the factory. In this paper, the finite element analysis method is used to calculate and analyze the metal structure of the equipment. The modeling part of the project and the process of calculation and analysis are completed in Pro/Engineer software. This design and analysis software is very powerful, and the modeling and analysis module of Pro/E can be seamlessly connected, that is, it can directly enter Pro/Mechanica for finite element analysis and calculation, it can be driven by global parameterization and has data correlation. That is to say, the finite element model can be modified directly by modifying the size of the model. In the process of finite element analysis and calculation, the difficulty lies in the link processing of the model and the analysis of the whole machine, and the scale of the model is also very large. Therefore, the reasonable simplification of the model should be carried out to achieve the balance between the calculation efficiency and the precision of the result. On the basis of this, the modal analysis of the whole machine is carried out. By comparing the natural frequency of the tenth order with the frequency of the external excitation, we can judge whether the structure will resonate or not, which will lead to the accident in the field. Through our calculation, through the analysis of the calculation results, we put forward some improved schemes for the design of the whole structure, so as to meet the requirements of calculation and ensure the safety of the field work. At the same time, the quality optimization design of the rigid leg is studied. Although there are still many factors in the quality optimization design, it provides a certain reference for the future design and subsequent improvement. Through the calculation of this project, we can get a deeper understanding of the important position of CAE technology in the practice of production. We do not need samples to be analyzed, as long as there are digital and analog models, so that we can do simulation and make a number of modifications before the samples are produced. Get a better plan, then sample production, batch production. CAE is important to calculate accurately, otherwise there is no point, for the external conditions, need to have good software and powerful computing ability of the computer; For people, this requires strong software operation ability, profound theoretical knowledge, and rich experience. CAE technology has been applied in many aspects, which has made great contribution to engineering practice.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH237

【参考文献】