| 深海立管涡激共振疲劳寿命简化计算方法 |
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| 引用本文： | 薛鸿祥,唐文勇,张圣坤.深海立管涡激共振疲劳寿命简化计算方法[J].工程力学,2008,25(5):231-235. |
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| 作者姓名： | 薛鸿祥 唐文勇 张圣坤 |
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| 作者单位： | 上海交通大学海洋工程国家重点实验室,上海,200030 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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上海市科委资助项目 |
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| 摘 要： | 针对深海顶端张紧式立管固有的特点,采用解析与经验公式相结合的方法建立了海洋立管涡激振动下疲劳寿命的简化预报模型,该模型能充分计及轴向张力对振型的变化以及对疲劳寿命的影响,通过实例计算指出了深海立管涡激振动诱发疲劳破坏的危险区域,并讨论了流速对疲劳寿命的影响。该模型形式简洁、计算量少,适合对深海立管等细长挠性受拉构件的疲劳寿命进行初步校核计算。
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| 关 键 词： | 深海立管 张紧式立管 涡激共振 疲劳寿命 简化模型 |
| 文章编号： | 1000-4750(2008)05-0231-04 |
| 修稿时间： | 2006年7月29日 |
A SIMPLIFIED METHOD TO ESTIMATE RISER FATIGUE LIFE CAUSED BY VORTEX-INDUCED RESONANCE |
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| XUE Hong-xiang,TANG Wen-yong,ZHANG Sheng-kun.A SIMPLIFIED METHOD TO ESTIMATE RISER FATIGUE LIFE CAUSED BY VORTEX-INDUCED RESONANCE[J].Engineering Mechanics,2008,25(5):231-235. |
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| Authors: | XUE Hong-xiang TANG Wen-yong ZHANG Sheng-kun |
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| Abstract: | According to the characteristic of deepwater top tensioned riser, a simplified method for estimating fatigue life caused by vortex-induced resonance is presented. The simplified model combines the analytica solution for transverse modal vibrations and the empirical expression of VIV amplitude based on wake oscillation model. It is proved that the method can take account of the modification of vibration mode and fatigue life caused by the variety of axial tension along the riser. The critical joint of fatigue damage due to VIV is presented and th effort of flow velocity on fatigue life is also discussed. This method is simple and practical for approximat calculation of fatigue damage from VIV of slender tensioned structures in design process. |
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| Keywords: | deepwater riser top-tensioned riser vortex-induced vibration fatigue life simplified model |
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