东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (7): 990-993.DOI: 10.12068/j.issn.1005-3026.2016.07.017

• 机械工程 • 上一篇    下一篇

核电站内压直管道在位移控制下的棘轮效应

陈小辉1, 陈旭2   

  1. (1. 东北大学秦皇岛分校 控制工程学院, 河北 秦皇岛066004; 2. 天津大学 化工学院, 天津300072)
  • 收稿日期:2015-04-22 修回日期:2015-04-22 出版日期:2016-07-15 发布日期:2016-07-13
  • 通讯作者: 陈小辉
  • 作者简介:陈小辉(1982-), 女, 河北秦皇岛人, 东北大学秦皇岛分校讲师, 博士; 陈旭(1963-),男,浙江衢州人,天津大学教授, 博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51435012); 东北大学秦皇岛分校博士基金资助项目(XNB2015001); 河北省高等学校科学技术研究项目(QN2015336); 中央高校基本科研业务费专项资金资助项目(L1523001).

Ratcheting Effect of Pressurized Straight Pipe Under Displacement Control

CHEN Xiao-hui1, CHEN Xu2   

  1. 1. School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; 2. School of Chemical Engineering, Tianjin University, Tianjin 300072, China.
  • Received:2015-04-22 Revised:2015-04-22 Online:2016-07-15 Published:2016-07-13
  • Contact: CHEN Xiao-hui
  • About author:-
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摘要: 研究核电站直管道在恒定内压和循环位移作用下的棘轮效应,分析了内压、循环位移和多步载荷对内压管道棘轮应变的影响.结果表明:最大棘轮应变发生在直管的环向方向,轴向棘轮应变与环向棘轮应变相比小得多.在相同内压下,棘轮应变随着循环位移的增大而增大;在相同位移下,棘轮应变随内压的增大而增大.采用多步加载时,前一步棘轮变形会降低后一步应有的棘轮应变率,尤其前一步具有较大的位移作用下发生棘轮应变后,这种现象十分明显.根据直管试验装置特点,确定了内压直管在位移控制下的棘轮边界.

关键词: 压力直管, 位移控制, 试验研究, 棘轮应变, 棘轮边界

Abstract: The ratcheting effect of pressurized straight pipe was studied for nuclear power plant. The effect of internal pressure, displacement and multistep loading on ratcheting strain was mainly studied. The results indicated that ratcheting strain occurs mainly in hoop direction and it′s not evident in axial direction. Ratcheting strain increases with the increasing of displacement at the same pressure. At the same displacement, ratcheting strain increases with the increasing of internal pressure. For multi-step loading, ratcheting strain rate in the next step would be decreased by ratcheting deformation in the preceding step. The effect of ratcheting history at higher level loading on ratcheting strain is larger than that at lower level loading. According to the quasi-three-point-bending apparatus, ratcheting boundary was determined.

Key words: pressurized straight pipe, displacement control, experimental study, ratcheting strain, ratcheting boundary

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