• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.1; 20051026-28; Nanjing(CN) >On Integrity Assessment of Boiler Tube Bends
【24h】

On Integrity Assessment of Boiler Tube Bends

机译：锅炉弯管完整性评估

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Prediction of the creep lives of the boiler tube bends used in fossil-fuelled power generation plant with sufficient accuracy is currently one of the challenges for maintenance engineers. This is because the manufacturing process causes the tube cross-section becomes oval producing complex effects on the creep behaviour of the bend. Based on the reference stress method, this paper presents a pragmatic model that may be used to obtain the creep life of tube bends with various degrees of ovalities subjected to uniform internal pressure. To reduce the cost of the analyses, the present investigation uses the elastic-plastic finite element analyses of the toroidal vessels to compute the limit pressures and the reference stresses of the oval tube bends. The investigation shows that: (1) toroidal vessels can be used to reliably compute the reference stresses in the oval tube bends and (2) the reference stress method presents an economical approach in predicting the creep lives of the oval tube bends subjected to uniform internal pressures.
机译：对化石燃料发电站中使用的锅炉弯管的蠕变寿命进行足够准确的预测，目前是维护工程师面临的挑战之一。这是因为制造过程导致管的横截面变为椭圆形，从而对弯曲的蠕变行为产生复杂的影响。基于参考应力法，本文提出了一种实用模型，可用于获得在均匀内压下具有不同椭圆度的弯管的蠕变寿命。为了降低分析的成本，本研究使用了对环形血管的弹塑性有限元分析来计算椭圆管弯头的极限压力和参考应力。研究表明：（1）环形容器可用于可靠地计算椭圆管弯头的参考应力；（2）参考应力方法为预测受均匀内部应力作用的椭圆管弯头的蠕变寿命提供了一种经济的方法。压力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号