海洋工程装备与技术 ›› 2014, Vol. 1 ›› Issue (3): 213-217.

• 海洋油气勘探开发技术与装备 • 上一篇    下一篇

随机波浪载荷下基于断裂力学的结构疲劳分析算法研究

尹彦坤, 陈实, 李挺前   

  1. 湛江南海西部石油勘察设计有限公司,广东 湛江 524057
  • 收稿日期:2014-08-20 出版日期:2014-09-20 发布日期:2016-03-30
  • 作者简介:

    作者简介:尹彦坤(1980-),男,高级工程师,主要从事海洋石油固定式平台结构设计.

Research of Numerical Algorithms for Structure's Fatigue Assessment in Random Waves Based on Fracture Mechanics

Yan-kun YIN, Shi CHEN, Ting-qian LI   

  1. Zhanjiang Nanhai West Oil Survey & Design Co., Ltd., Zhanjiang, Guangdong 524057, China
  • Received:2014-08-20 Online:2014-09-20 Published:2016-03-30

摘要:

应用断裂力学方法进行结构疲劳评估,Paris法则给出了简洁的计算公式,但是对于海洋结构物来说,在随机波浪载荷下的响应是非常复杂的.因此,对于结构疲劳寿命的评估,寻求一种兼顾计算效率,准确度和安全性的计算方法是非常重要的.结构的响应应力是一个随机变量,为了提高计算效率,研究了其等效恒值应力;为了保证计算结果的安全性,探讨了长期波浪分布下应力的加载次序.

关键词: 随机波浪, 断裂力学, 疲劳, 算法

Abstract:

Paris law gives a simple formula for offshore structure's fatigue assessment with fracture mechanics method. However, the input "stress" data are complex, because the offshore structure's response under random waves is complex. For structures exposed under long-term waves, it is important to find a numerical algorithm which is efficient, accurate and safe for calculating fatigue life. Structure's response stress is a random variable, so its equivalent constant value can be investigated for efficiency,and its loading sequence under long-term waves should be investigated for conservation.

Key words: random waves, fracture mechanics, fatigue, numerical algorithm

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