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The effects of thermal transients on flange sealing.

机译：热瞬变对法兰密封的影响。

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摘要

The analysis developed in this project is used to determine the thermal and mechanical effects of temperature on the operation of bolted flanged joints. The goal of the study was to provide a theoretical basis for the development of a method of analysis of these effects, to be used in the design process of pressure vessel and piping equipment. The research established the temperature profile of the joint components during steady state operation and also during dynamic thermal transients. These temperature profiles were then used to determine the mechanical effects (deformation and load) on each of the joint components.; Analytical equations were developed to determine the steady state temperature profile of the joint components. These equations were then modified, and extended, to allow the determination of the temperature profile in the joint at critical stages during thermal transient operation. These temperature profiles were then used to determine the mechanical deformation and also the mechanical interaction of the joint components. The complete analytical method allows the analysis of the full effects of temperature on bolted flanged joints.; Finite Element Analysis is used to verify the developed theoretical equations, for both the temperature distribution and the subsequent mechanical interaction. The analytical results for steady state temperature distribution where also verified by comparison to experimentation on a NPS 3 inch ASME flange and by comparison with temperature measurements taken on operational heat exchangers in a refinery. The developed theoretical method for the analysis of the transient effects of temperature was verified by comparison to Finite Element Analysis. Additionally, laboratory experimentation was performed on a specially constructed 24 inch test rig to confirm the overall validity of both the Finite Element Analysis and the developed analytical approach.
机译：该项目中开发的分析用于确定温度对螺栓法兰连接的操作的热和机械影响。该研究的目的是为开发这些影响的分析方法提供理论依据，该方法将用于压力容器和管道设备的设计过程中。该研究建立了稳态运行期间以及动态热瞬态过程中接头部件的温度曲线。然后将这些温度曲线用于确定每个接头部件的机械作用（变形和载荷）。开发了分析方程式以确定接头部件的稳态温度曲线。然后对这些方程进行修改和扩展，以允许在热瞬态运行期间的关键阶段确定接头中的温度曲线。然后将这些温度曲线用于确定机械变形以及接头组件的机械相互作用。完整的分析方法可以分析温度对螺栓法兰连接的全部影响。有限元分析用于验证所建立的理论方程式，包括温度分布和随后的机械相互作用。稳态温度分布的分析结果也通过与NPS 3英寸ASME法兰上的实验进行比较以及与炼油厂中运行的热交换器进行的温度测量进行比较得到了验证。通过与有限元分析进行比较，验证了已开发的用于分析温度瞬态效应的理论方法。此外，在特殊构造的24英寸试验台上进行了实验室实验，以确认有限元分析和已开发的分析方法的总体有效性。

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  • 作者

    Brown, Warren.;

  • 作者单位

    Ecole Polytechnique, Montreal (Canada).;

  • 授予单位 Ecole Polytechnique, Montreal (Canada).;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 255 p.
  • 总页数 255
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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