海洋工程装备与技术 ›› 2015, Vol. 2 ›› Issue (2): 75-79.

• 海洋油气勘探开发技术与装备 •    下一篇

复杂应力状态下桩腿节点多轴疲劳寿命评估

刘英芳, 刘洪峰, 姜福洪, 伞立忠, 王延凤, 徐万雄   

  1. 大连船舶重工集团设计研究所有限公司,辽宁 大连 116005
  • 收稿日期:2015-01-22 出版日期:2015-04-10 发布日期:2016-03-30
  • 作者简介:

    作者简介:刘英芳(1988--),男,硕士,助理工程师,主要从事海洋工程结构强度与疲劳计算研究.

  • 基金资助:
    国家发改委海洋工程装备研发及产业化专项(自升式生产储卸油平台研发设计;自主知识产权系列化自升式钻井平台设计建造技术研发及产业化)

Multiaxial Fatigue Assessment of Pile Leg Joint under Complex Stress State

Ying-fang LIU, Hong-feng LIU, Fu-hong JIANG, Li-zhong SAN, Yan-feng WANG, Wan-xiong XU   

  1. Dalian Shipbuilding Industry Engineering and Research Institute Co., Ltd., Dalian, Liaoning 116005, China
  • Received:2015-01-22 Online:2015-04-10 Published:2016-03-30

摘要:

引入了一种多轴疲劳寿命评估方法,并对该方法的疲劳评估流程进行研究.使用该方法联合热点应力法对国际公开发表的250多个疲劳试验数据进行多轴疲劳寿命预测,验证了该方法多轴疲劳寿命预测的精确度.最后使用该方法成功对自升式平台K型桩腿节点进行了多轴疲劳寿命评估,可为提高桩腿节点疲劳寿命预测的准确性提供有益参考.

关键词: 自升式平台, 管节点, 应力集中, 多轴疲劳

Abstract:

A new multiaxial fatigue criterion is introduced. In combination with the hot spot stress method, it is used to estimate the fatigue life of about 250 test specimens published in international open literature, through which the accuracy of the new method is verified. Finally we use the new method to do a successful fatigue life assessment of the pile leg joint. This research provides an available reference to improve the accuracy of the fatigue life prediction of pile leg joint.

Key words: jack-up platform, tubular joint, stress concentration, multiaxial fatigue

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