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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.3: Design and Analysis; 20050717-21; Denver,CO(US) >CLASSIFICATION OF SHELL STRESSES RESULTING FROM PIPING NOZZLE LOADS
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CLASSIFICATION OF SHELL STRESSES RESULTING FROM PIPING NOZZLE LOADS

机译：管嘴载荷引起的壳应力分类

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摘要

In a previous paper, the authors discussed the classification of membrane stresses caused by piping loads resulting from restrained free thermal expansion. In that paper the authors proposed that although these stresses exhibit both primary and secondary characteristics, it is more appropriate to classify the resulting stresses as primary. In this paper, the authors present further FEA-based justification of this hypothesis. First, the vessel-nozzle intersection is modeled with 3D solid elements. Next, an elastic-plastic analysis of the previously examined piping/vessel layout is presented, with an examination of the final strain levels. Finally, a shakedown evaluation is performed. The results of these evaluations show that, unless additional analysis indicates otherwise, the membrane stresses resulting from restrained free thermal expansion piping loads should be classified as primary.
机译：在先前的论文中，作者讨论了由受限制的自由热膨胀引起的管道载荷引起的膜应力的分类。在那篇论文中，作者提出，尽管这些应力同时具有主要和次要特征，但将结果应力分类为主要应力更为合适。在本文中，作者提出了该假设的进一步基于FEA的论证。首先，使用3D实体元素对血管喷嘴相交进行建模。接下来，将对先前检查过的管道/容器布局进行弹塑性分析，并对最终应变水平进行检查。最后，进行评估。这些评估的结果表明，除非另有分析表明，否则因自由热膨胀管道负载受到限制而引起的膜应力应归为主要应力。

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