• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2002 ASME Pressure Vessels and Piping Conference, Aug 5-9, 2002, Vancouver, British Columbia, Canada >ASSESSMENT OF LOCAL WALL THINNED PIPELINE UNDER COMBINED BENDING AND PRESSURE
【24h】

ASSESSMENT OF LOCAL WALL THINNED PIPELINE UNDER COMBINED BENDING AND PRESSURE

机译：弯曲与压力联合作用下局部薄壁管道的评估

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

Failure of a pipeline due to local wall thinning is getting more attention in the nuclear power plant industry. Although guidelines such as ANSI/ASME B31G are still useful for assessing the integrity of a wall thinned pipeline, there are some limitations in these guidelines. For instance, these guidelines consider only pressure loading and thus neglect bending loading. However, most pipelines in nuclear power plants are subjected to internal pressure and bending moment due to dead-weight loads and seismic loads. Therefore, an assessment procedure for locally wall thinned pipeline subjected to combined loading is needed. In this paper, three-dimensional finite element(FE) analyses were performed to simulate full-scale pipe tests conducted for various shapes of wall thinned area under internal pressure and bending moment. Maximum moments based on ultimate stress (σ_u) were obtained from FE results to predict the failure of the pipe. These results were compared with test results, which showed good agreement. Additional finite element analyses were performed to investigate the effect of key parameters, such as wall thinned depth, wall thinned angle and wall thinned length, on maximum moment. Also, the effect of internal pressure on maximum moment was investigated. Change of internal pressure did not show significant effect on the maximum moment.
机译：由于局部壁变薄而导致的管道故障在核电站行业中越来越受到关注。尽管诸如ANSI / ASME B31G之类的准则仍可用于评估壁薄管道的完整性，但这些准则仍存在一些局限性。例如，这些准则仅考虑压力载荷，因此忽略弯曲载荷。但是，由于自重载荷和地震载荷，核电站中的大多数管道都承受内部压力和弯矩。因此，需要对承受联合荷载的局部薄壁管道进行评估的程序。本文进行了三维有限元（FE）分析，以模拟在内部压力和弯矩作用下对各种形状的壁薄区域进行的全尺寸管道测试。从有限元结果中获得基于极限应力（σ_u）的最大矩，以预测管道的故障。将这些结果与测试结果进行比较，结果显示出良好的一致性。进行了额外的有限元分析，以研究关键参数（例如，壁变薄深度，壁变薄角度和壁变薄长度）对最大弯矩的影响。此外，还研究了内部压力对最大力矩的影响。内部压力的变化对最大力矩没有显着影响。

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