| 荷载类型和几何参数对T节点疲劳寿命的影响 |
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| 引用本文： | 孙福深,杨志刚.荷载类型和几何参数对T节点疲劳寿命的影响[J].烟台职业学院学报,2007,13(1):58-62. |
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| 作者姓名： | 孙福深 杨志刚 |
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| 作者单位： | 烟台市芝罘公路管理局,山东,烟台,264000 |
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| 摘 要： | 对海洋平台中圆管节点的疲劳寿命估算,通常采用的是基于热点应力幅基础上的S-N曲线法。这种方法认为循环荷载作用下圆管节点的疲劳寿命是由管节点焊缝周围的最大应力幅决定的。由于承受不同载荷类型以及具有不同几何参数的管节点可能具有相同的热点应力,而沿着焊缝周围的热点应力分布却并不一定相同,这种热点应力分布的差异会影响到管节点的疲劳破坏过程。采用有限元方法研究了荷载类型和几何参数对T节点疲劳寿命的影响,为T节点的疲劳设计提供了有益的思路和建议。
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| 关 键 词： | 海洋平台 热点应力幅 荷载类型 几何参数 T节点 |
| 文章编号： | 1673-5382(2007)01-0058-05 |
| 修稿时间： | 2007年1月4日 |
Effect of Loading Type and Geomentrical Paramenters on the Fatigue Life of Tubular T-joints |
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| SUN Fu-shen,YANG Zhi-gang.Effect of Loading Type and Geomentrical Paramenters on the Fatigue Life of Tubular T-joints[J].Journal of Yantai Vocational College,2007,13(1):58-62. |
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| Authors: | SUN Fu-shen YANG Zhi-gang |
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| Abstract: | S-N curves based on the hot spot stress range are generally used to predict the fatigue life of tubular joints in offshore platformeering.In this method,the fatigue life is believed to be determined by the maximum hot spot stress range along the weld toe for tubular joints subjected to cyclic loading.As tubular joints with different geometrical parameters or subject to different types of loading may have same hot spot stress,and the hot spot stress distribution along the weld toe can be different,thus the difference of the hot spot stress distribution will affect the fatigue failure of tubular joints.Finite element method is used in this research to study the effect of the loading type and the geometrical parameters on the fatigue life of tubular T-joints.The investigation results can provide useful advice on the fatigue design of tubular T-joints. |
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| Keywords: | offshore platform hot spot stress range loading type geometrical parameters tubular T-joints |
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