专用有限元分析软件的开发与应用

【作者】 王文志；

【导师】 李华山；

【作者基本信息】 北方工业大学 ， 计算机应用技术， 2005， 硕士

【副题名】轮胎硫化温度场仿真系统

【摘要】 有限元分析方法是当前计算机辅助工程(CAE)中应用最为广泛的技术,利用有限元分析方法实现轮胎硫化过程中温度场的数值模拟对优化设计和保证轮胎安全生产具有重大的指导意义。硫化是轮胎生产中的最后一道工序,对轮胎的质量有着巨大影响,如果能够获得整个过程中轮胎内部温度场的变化,就可以正确调整生产工艺,从而保证产品质量。国内企业往往通过热电藕测量轮胎内部温度,或者采用手工准备数据(在图纸上手工绘图、剖分)再进行有限元计算的低效率方式。前一种方式只能获得有限个部位的温度情况,对整体温度场的分布无能为力;而后一种方式效率低下,工作周期长,并且每次试制新产品时都要重新开始上一次的重复劳动。本文主要在前人研究和实践的基础上,把有限元分析方法和计算机仿真技术应用于轮胎硫化过程,将几何建模、自动剖分、温度场计算、计算结果可视化这些工作流程集成于一个有限元分析系统中,在计算机上实现了轮胎硫化过程温度场的有限元模拟,改变了以往的工作方式。本文进行的主要研究内容有:(1)在对温度场进行理论分析基础上建立合适的有限元模型;(2)给出了有效的自动剖分算法;(3)给出了有效的计算结果可视化算法;(4)在分析系统功能的基础上设计实现了生动形象、友好便捷的可视化用户界面,使温度场有限元分析工作更加方便灵活;(5)针对产品实例进行计算,验证系统的可靠性。最终的实验结果表明,温度场仿真系统能够比较真实的反映轮胎在整个硫化过程中的温度变化,对轮胎企业改进硫化工艺、提高轮胎生产效率具有实际意义。更多还原

【Abstract】 Finite element analysis (FEA) is mostly used method in computer aided engineering (CAE) nowadays, and it has great directive significance to realize numeric analysis and simulation of temperature field whitin tire in curing by finite element analysis for optimizing design and guarantee quality of tire production. The curing process is the last step in tire production and it is important for quality of tire. If the change of temperature field within the tire is obtained in the whole course, people can adjust the production technology correctly so as to guarantee product quality. Domestic enterprises often measure the temperature within the tire through the thermoelectric sensors, or adopt an inefficient method by drawing and triangulating by hand on the blueprmt.The former can get only temperature of finite points and is powerless for the distribution of whole temperature field.The latter’ work period is long and people have to do the inefficient repetitive work when trial-produce new products. Based on precedent researches and practice, this paper applied Finite element analysis and computer simulating technology to tire curing procedure and integrated modeling of geometry , automatic triangulation, temperature field computing, the visualization of computing result in a finite element analytical system and realizing Finite element analysis of temperature field whithin tire in curing on computer, therefore, changed the past working way. The following is done in this paper: (1) Setting up the proper FEA model based on theoretical research for temperature field whithin tire in vulcanizing; (2) Realizing an effctive automatic triangulation algorithm; (3) Realizing an effective visualization algorithm; (4) Developing an vivid and friendly visual user interface, which makes the finite element analysis to temperature field more easy and flexible; (5)Computing to special type of products to ensure the reliability of system. Final experimental result indicate temperature field simulating system can truely reflects change of temperature within tire in vulcanizing, and it is has actual meanings for tire enterprises to improve the production efficiency.更多还原