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首页> 外文期刊>Journal of thermal stresses >SIMPLIFIED THERMOELASTOPLASTIC MODELS FOR DETERMINATION OF GLOBAL AND LOCAL STRESS IN COKE DRUMS
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SIMPLIFIED THERMOELASTOPLASTIC MODELS FOR DETERMINATION OF GLOBAL AND LOCAL STRESS IN COKE DRUMS

机译：用于确定焦炭罐整体和局部应力的简化热弹塑性模型

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摘要

Coke drums as major pressure vessels in delayed coking process experience cyclic thermal and mechanical loading during operation. The elastic-plastic behavior of coke drums including global and local (hot and cold spot) stress distribution has been analyzed using finite element analysis (FEA) method in our previous study. Here, instead of using FEA simulations, simplified theoretical models (STM) for global and local stress determination are developed. The global stress model is developed based on a single cladded shell element with temperature and pressure loading cycle. The local stress model is built on an axisymmetric circular cladded plate experiencing a non-uniform temperature distribution history. With the same input data, stress and strain values estimated by the STM are consistent with those from the FEA. An ease-of-use software package with built-in STMs is developed. It is the objective of this paper to show that STM can be a very time- and cost-saving analysis tool for general industrial users compared to professional commercial FEA software.
机译：焦炭塔是延迟焦化过程中的主要压力容器，在运行过程中会经历周期性的热负荷和机械负荷。在我们先前的研究中，已经使用有限元分析（FEA）方法分析了焦炭鼓的弹塑性行为，包括整体和局部（热点和冷点）应力分布。在这里，代替使用FEA仿真，开发了用于确定全局和局部应力的简化理论模型（STM）。全局应力模型是基于具有温度和压力加载周期的单个覆层壳单元开发的。局部应力模型建立在经历了不均匀温度分布历史的轴对称圆形覆层板上。使用相同的输入数据，由STM估算的应力和应变值与来自FEA的一致。开发了带有内置STM的易用软件包。本文的目的是表明，与专业的商用FEA软件相比，STM对于普通工业用户而言可以是一种非常省时省钱的分析工具。

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