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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) >PIPING LOCAL STRESSES FOR SOLID VERSUS HOLLOW ATTACHMENTS
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PIPING LOCAL STRESSES FOR SOLID VERSUS HOLLOW ATTACHMENTS

机译：固态对空心连接的管道局部应力

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摘要

The simple and most commonly used WRC-107 (Welding Research Bulletin #107) Bijlaard methodology for local stress evaluation addresses cylindrical shells and pipes with solid circular, rectangular, and square attachments only. Hollow circular, square, or rectangular tubular shaped attachments on cylindrical shells, though commonly used, are not addressed in WRC-107. ASME Code Case N-392 addresses hollow circular attachments on pipes but is known to be conservative. This paper studies commonly encountered sizes of hollow circular, hollow square, and hollow rectangular attachments of various wall thicknesses on piping utilizing rigorous finite element analysis (FEA) method to obtain the local stresses at the pipe/attachment interface due to mechanical loads. A total of fifty (50) finite element models were analyzed to study the most frequently used configurations. The impact of attachment wall thickness including solid attachment will be addressed. A comparison of finite element results with WRC-107 solid attachment results, when applicable, will be made. Recommendations and guidelines are provided based on the results of the FEA study. The objective is to reduce conservatism, and hence the associated cost in piping and pipe support design by optimizing the round attachment's wall thickness.
机译：用于局部应力评估的简单且最常用的WRC-107（Welding Research Bulletin＃107）Bijlaard方法仅处理具有实心圆形，矩形和正方形附件的圆柱壳和管道。 WRC-107中未提及圆柱形外壳上的空心圆形，方形或矩形管状附件，尽管常用。 ASME案例N-392解决了管​​道上的空心圆形附件，但众所周知是保守的。本文使用严格的有限元分析（FEA）方法研究管道上各种壁厚的空心圆形，空心方形和空心矩形附件的常见尺寸，以获取由于机械载荷而在管道/附件界面处的局部应力。总共分析了五十（50）个有限元模型，以研究最常用的配置。将解决包括牢固附着在内的附着壁厚度的影响。适用时，将有限元结果与WRC-107实体附件结果进行比较。根据FEA研究的结果提供了建议和指南。目的是通过优化圆形附件的壁厚来减少保守性，从而降低管道和管道支撑设计的相关成本。

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