海洋立管两自由度振动的涡激损伤分析

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (19) : 99-103.

论文

海洋立管两自由度振动的涡激损伤分析

孙雷1，董晓磊1，宗智1，董婧2，周力1

作者信息 +

Analysis of VIV induced fatigue damage of marine riser at two freedoms

SUN Lei1, DONG Xiao-Lei1, ZONG Zhi1, DONG Jing2, ZHOU Li1

Author information +

文章历史 +

摘要

将随机振动理论中的虚拟激励法引入到海洋立管涡激振动计算中，建立了相应的数值方法，编制计算程序实现了海洋立管在流向与横向两个自由度上的随机振动响应分析。对横向振动进行了实验模型计算，通过与实验对比，检验了将虚拟激励法应用于立管涡激振动的可行性；并记录了此方法的计算时间，验证了此方法的快速性。应用P-M准则，对响应进行分析得到立管的年损伤率，实现了深海立管的疲劳损伤预报。文章的分析方法可为海洋立管涡激振动响应计算和工程设计提供一定的参考作用。

Abstract

By introducing Pseudo-excitation method of random vibration theory into the VIV calculation of marine riser, a numeral calculation method is established. The analysis of in-line and flow-cross random vibration response to marine riser is performed via the programming codes based on this method. Comparing the calculation results of the flow-cross response of riser with the experimental results, the feasibility of the application of Pseudo-excitation method of random vibration theory to the VIV calculation of marine riser is verified. The computing time are recorded to validate the high calculation efficiency of this new method. The fatigue damage rate of the riser per year is evaluated and the service life of the riser can be predicted based on the P-M criterion. A reference to the calculation of VIV response and engineering design of marine riser is provided by the method.

导出引用

孙雷;董晓磊&#;宗智;董婧;周力. 海洋立管两自由度振动的涡激损伤分析[J]. 振动与冲击, 2012, 31(19): 99-103

SUN Lei;DONG Xiao-Lei;ZONG Zhi;DONG Jing;ZHOU Li. Analysis of VIV induced fatigue damage of marine riser at two freedoms[J]. Journal of Vibration and Shock, 2012, 31(19): 99-103