基于Hertz模型的海洋立管束碰撞力计算方法研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 248-253.

论文

徐万海，李航，贺子琪

作者信息 +

Calculation method for collision force of marine riser bundles based on Hertz model

XU Wanhai, LI Hang, HE Ziqi

Author information +

文章历史 +

摘要

立管是海洋油气开采的关键设备之一，其在流致振动作用下，相邻立管可能会发生振动碰撞损伤。本文基于Hertz模型，针对不同夹角下的两根立管碰撞的碰撞力计算开展研究。借助有限元方法探讨海洋立管局部碰撞过程，立管的直径选取为工程应用较为广泛的12英寸，截取长度基于相关碰撞参与长度来确定，径厚比范围为16~60，分别设置立管碰撞时的速度为0.25m/s、1.5m/s、2.4m/s和3m/s，分析两根立管夹角和立管径厚比等对于Hertz模型计算精度的影响。研究发现：两根立管夹角越小和径厚比越小，Hertz模型得到的碰撞力误差越大；通过在Hertz模型中添加与径厚比相关的系数，对Hertz模型进行了修正，最终得到了关于立管束碰撞力的精确计算方法。

Abstract

Riser pipes are crucial equipment in offshore oil and gas exploitation, and they are susceptible to vibration-induced collisions and damage when subjected to fluid-induced vibrations. This study focuses on the computation of collision forces between two adjacent riser pipes at different angles, utilizing the Hertz model. Employing the finite element method, an investigation is conducted on the localized collision process of marine riser pipes. The chosen diameter for the riser pipes is a widely used 12 inches, while the selected length is determined based on the associated collision-involved length. The range of the diameter-to-thickness ratio is set from 16 to 60. Various velocities of 0.25 m/s, 1.5 m/s, 2.4 m/s, and 3 m/s are assigned for the riser pipe collision scenarios. The impact of the angle between the two riser pipes and the diameter-to-thickness ratio on the accuracy of the Hertz model calculations is thoroughly analyzed. The research findings reveal that as the angle between the riser pipes decreases and the diameter-to-thickness ratio diminishes, the Hertz model exhibits higher discrepancies in the computed collision forces. To address this issue, a modification to the Hertz model is proposed by incorporating a coefficient directly linked to the diameter-to-thickness ratio. Ultimately, an accurate calculation methodology is derived for the collision forces within a bundle of riser pipes.

导出引用

徐万海，李航，贺子琪. 基于Hertz模型的海洋立管束碰撞力计算方法研究[J]. 振动与冲击, 2024, 43(13): 248-253

XU Wanhai, LI Hang, HE Ziqi. Calculation method for collision force of marine riser bundles based on Hertz model[J]. Journal of Vibration and Shock, 2024, 43(13): 248-253

参考文献

[1] Leira B J. Estimation of extreme response and fatigue damage for colliding risers [C]//OMAE. Oslo, Norway, 2002. [2] Leira B J, Holmas T, Herfjord K. A Probabilistic Design Approach for Riser Collision based on Time- Domain Response Analysis[C]// Proc Icossar, Newport Beach, 2001. [3] Leira B J, Holmas T, Herfjord K. Probabilistic Analysis and Design in Relation to Riser-Riser Collision[C]// 12th International Offshore and Polar Engineering Conference, Kitakyushu, Japan, 2002. [4] Duggal A S, Niedzwecki J M. Probabilistic collision model for a pair of flexible cylinders[J]. Applied ocean research, 1994, 16(3) : 165-175 . [5] Winterstein S R, Cornell C A. Energy fluctuation scale and diffusion models [J]. Journal of engineering mechanics, 1985, 111(2): 125-142. [6] 吴天龙. 海洋立管相互碰撞问题研究[D]. 兰州: 兰州理工大学, 2014. Wu, Tianlong. Research on mutual collision of marine risers [D]. Lanzhou: Lanzhou University of Technology, 2014. [7] 杨尊儒. 张力腿平台的顶张式立管碰撞数值模拟研究[D]. 舟山：浙江海洋大学，2016 Yang, Zunru. Numerical simulation study of top-tensioned riser collision on tension leg platform [D]. Zhoushan: Zhejiang Ocean University, 2016. [8] Morrison D, Kim W. Li Y, et al. Advances in Designing for Riser Impacts Resulting From VIV [C]. 21st International Conference on Offshore Mechanics and Arctic Engineering, Oslo Norway, 2002 [9] Li Y, Morrison DG. The Colliding Participating Mass, A Novel Technique to Quantify Riser Collisions[C]. OMAE, New Oleans, L A,2000. [10] Li Y. The Concept of Virtual Penetration and Its Application In Risers With Multiple Contacts[C]. 21st International Conference on Offshore Mechanics and Arctic Engineering, Oslo Norway,2002. [11] Neto ET, Ruggieri C, Ferrari JA. Numerical Representation of the Collision Interaction Mass for Dual Riser Systems[C]. 21st International Conference on Offshore Mechanics and Arctic Engineering, Oslo Norway, 2002. [12] 金伟良，宋剑，龚顺风. 船舶与海洋平台撞击的荷载模拟[J]. 计算力学学报，2004，21(1)：26-32. Jin, Weiliang, Song Jian, Gong Shunfeng. Load simulation of collision between ships and offshore platforms [J]. Chinese Journal of Computational Mechanics, 2004, 21(1): 26-32. [13] DNVGL-ST-F101. Submarine pipeline systems[J]. Det Norske Veritas Germanischer Lloyd, 2017, 201.