STUDY ON VORTEX-INDUCED VIBRATION SUPPRESSION OF MARINE RISER BASED ON ENERGY TRANSFER
-
摘要: 涡激振动是造成海洋立管疲劳损伤的重要因素, 抑制振动能够保障结构安全, 延长使用寿命. 多数涡激振动抑制方法基于干扰流场的方式, 但在复杂环境条件下, 仅通过干扰流场对振动的抑制效果有限. 因此, 从结构层面考虑开展了海洋立管涡激振动抑制研究. 基于能量传递的理论, 阐述了立管涡激振动过程中的能量传递规律. 振动能量以行波形式由能量输入区传播至能量耗散区, 主要在能量耗散区被消耗. 通过局部增大能量耗散区的阻尼, 增加振动能量在传播过程中的消耗, 实现涡激振动抑制. 为了求解立管涡激振动响应, 构建了尾流振子预报模型, 并根据实验结果验证了理论模型的可靠性. 基于理论计算得到的能量系数, 判定立管涡激振动的能量输入区和能量耗散区. 通过对比立管增大阻尼前后的响应, 分析了涡激振动抑制效果. 研究结果表明: 在能量输入区增大阻尼对涡激振动的抑制效果并不显著; 在能量耗散区增大阻尼使能量衰减系数达到临界值之后, 能够显著降低立管上部和底部的涡激振动位移; 当能量衰减系数超过临界值后, 继续增大耗散区阻尼对涡激振动抑制效果的提升不明显.Abstract: Vortex-induced vibration is an important factor which may cause serious fatigue damage of marine risers. The suppression of vortex-induced vibrations can ensure structural safety and prolong service life of marine risers. Most of the suppression methods of vortex-induced vibrations are based on disturbing the flow fields. In some complex environmental conditions, only disturbing the flow fields behind marine risers may have limited effect on the suppression of vortex-induced vibration. Therefore, the vortex-induced vibration suppression of marine risers was studied from the perspective of structure. Based on the theory of energy transfer, the law of energy transfer during vortex-induced vibrations of marine riser was described. The vibration energy propagates from the energy input region to the energy dissipation region in the form of traveling wave and is mainly consumed in the energy dissipation region. By locally increasing the damping in the energy dissipation region, the consumption of vibration energy in the propagation process can be increased to achieve the suppression of vortex-induced vibrations. In order to solve the vortex-induced vibration response of the marine riser, a theoretical model was established based on the wake oscillator model, and the reliability of the theoretical model was verified by the experimental results. The energy input region and energy dissipation region of the vortex-induced vibrations were determined by the energy coefficients calculated from the theoretical method. The suppression effect of the vortex-induced vibrations was studied by comparing the response of the marine riser before and after increasing the damping. If the damping in the energy input region is increased, the suppression effect of vortex-induced vibrations is not obvious. The vibration displacements in the upper and bottom locations of the marine riser significantly decrease when the energy attenuation coefficient reaches the critical value by increasing the damping in the energy dissipation region. When the energy attenuation coefficient exceeds the critical value, the suppression effect of vortex-induced vibrations is not improved by increasing damping in the energy dissipation region.
-
Key words:
- marine riser /
- vortex-induced vibration /
- suppression /
- energy transfer /
- damping
-
图 1 立管涡激振动过程中的能量传递示意图
Figure 1. Schematic diagram of energy conduction during the vortex-induced vibration
图 9 z/L = 0.8 ~ 1.0段不同阻尼比对应的βR值
Figure 9. Values of βR corresponding to different damping ratios at z/L = 0.8 ~ 1.0
图 10 z/L = 0 ~ 0.2段阻尼增大后的位移均方根
Figure 10. Root mean square of displacements after increasing damping ratio at z/L = 0 ~ 0.2
图 11 z/L = 0.2 ~ 0.4段阻尼增大后的位移均方根
Figure 11. Root mean square of displacements after increasing damping ratio at z/L = 0.2 ~ 0.4
图 12 z/L = 0.4 ~ 0.6段阻尼增大后的位移均方根
Figure 12. Root mean square of displacements after increasing damping ratio at z/L = 0.4 ~ 0.6
图 13 z/L = 0.6 ~ 0.8段阻尼增大后的位移均方根
Figure 13. Root mean square of displacements after increasing damping ratio at z/L = 0.6 ~ 0.8
图 14 z/L = 0.8 ~ 1.0段阻尼增大后的位移均方根
Figure 14. Root mean square of displacements after increasing damping ratio at z/L = 0.8 ~ 1.0
15 位移云图和频谱图(z/L = 0.8 ~ 1.0段阻尼比为0.103)
15. Displacement contour and frequency spectrum (damping ratio is 0.103 at z/L = 0.8 ~ 1.0)
15 位移云图和频谱图(z/L = 0.8 ~ 1.0段阻尼比为0.103)(续)
15. Displacement contour and frequency spectrum (damping ratio is 0.103 at z/L = 0.8 ~ 1.0)(continued)
表 2 立管的主要参数
Table 2. Major parameters of the riser
Parameters Values length L/m 1500 diameter D/mm 0.3048 thickness/m 0.0136 Young's modulus E/Pa 2.1 × 1011 damping ratio ζs 0.003 material densityρs/(kg·m−3) 7850 sea-water density ρw/(kg·m−3) 1025 internal flow density ρf/(kg·m−3) 800 pretension force Tc/kN 1662.7 
下载: 导出CSV
-
[1] Wu XD, Ge F, Hong YS. A review of recent studies on vortex-induced vibrations of long slender cylinders. Journal of Fluids and structures, 2012, 28: 292-308 doi: 10.1016/j.jfluidstructs.2011.11.010 [2] 陈伟民, 付一钦, 郭双喜等. 海洋柔性结构涡激振动的流固耦合机理和响应. 力学进展, 2017, 47: 25-91 (Cheng Weimin, Fu Yiqin, Guo Shuangxi, et al. Fluid-solid coupling and dynamic response of vortex-induced vibration of slender ocean cylinders. Advances in Mechanics, 2017, 47: 25-91 (in Chinese) [3] Kandasamy R, Cui FS, Townsend N, et al. A review of vibration control methods for marine offshore structures. Ocean Engineering, 2016, 127: 279-297 doi: 10.1016/j.oceaneng.2016.10.001 [4] Rashidi S, Hayatdavoodi M, Esfahani JA. Vortex shedding suppression and wake control: A review. Ocean Engineering, 2016, 126: 57-80 doi: 10.1016/j.oceaneng.2016.08.031 [5] Hong K, Shah UH. Vortex-induced vibrations and control of marine risers: A review. Ocean Engineering. 2018, 152: 300-315 [6] Liu GJ, Li HY, Qiu ZZ, et al. A mini review of recent progress on vortex-induced vibrations of marine risers. Ocean Engineering, 2020, 195: 106704 doi: 10.1016/j.oceaneng.2019.106704 [7] Baz A, Ro J. Active control of flow-induced vibrations of a flexible cylinder using direct velocity feedback. Journal of Sound and Vibration, 1991, 146(1): 33-45 doi: 10.1016/0022-460X(91)90521-K [8] Do KD, Pan J. Boundary control of three-dimensional inextensible marine risers. Journal of Sound and Vibration, 2009, 327(3-5): 299-321 doi: 10.1016/j.jsv.2009.07.009 [9] Nguyen TL, Do KD, Pan J. Boundary control of two-dimensional marine risers with bending couplings. Journal of Sound and Vibration, 2013, 332(16): 3605-3622 doi: 10.1016/j.jsv.2013.02.026 [10] 赵志甲, 刘屿, 郭芳等. 海洋柔性立管输出反馈边界控制. 控制理论与应用, 2017, 34(2): 205-214Zhao Zhijia, Liu Yu, Guo Fang, et al. Boundary output feedback control for a flexible marine riser. Control Theory and Applications, 2013, 332(16): 3605-3622 (in Chinese) [11] Song JX, Chen WM, Guo SX, et al. LQR control on multimode vortex-induced vibration of flexible riser undergoing shear flow. Marine Structures, 2021, 79: 103047 doi: 10.1016/j.marstruc.2021.103047 [12] 赵瑞, 马烨璇, 闫术明等. 海洋立管涡激振动的主动控制技术. 船舶工程, 2021, 43(4): 136-139 (Zhao Rui, Ma Yexuan, Yan Shuming, et al. Active control technology for vortex induced vibration of offshore riser. Ship Engineering, 2021, 43(4): 136-139 (in Chinese) [13] Chen WL, Xin DB, Xu F, et al. Suppression of vortex-induced vibration of a circular cylinder using suction-based flow control. Journal of Fluids and Structures, 2013, 42: 25-39 doi: 10.1016/j.jfluidstructs.2013.05.009 [14] 刘雨. 深海立管涡激振动主动抑制技术试验研究. [硕士论文]. 青岛: 山东科技大学, 2020Liu Yu. Experimental study on active vibration suppression technology of vortex-induced vibration of deep sea riser. [Master Thesis]. Qingdao: Shandong University of Science and Technology, 2020 (in Chinese)) [15] Zhu HJ, Yao J, Ma Y, et al. Simultaneous CFD evaluation of VIV suppression using smaller control cylinders. Journal of Fluids and Structures, 2015, 57: 66-80 doi: 10.1016/j.jfluidstructs.2015.05.011 [16] 柏伟峰. 抑制圆柱流致振动的行波壁控制方法研究. [硕士论文]. 哈尔滨: 哈尔滨工业大学, 2017Bai Weifeng. Research on suppression of the flow-induced vibration of a circular cylinder by traveling wave wall control method. [Master Thesis]. Harbin: Harbin Institute of Technology, 2017 (in Chinese)) [17] Zdravkovich MM. Review and classification of various aerodynamic and hydrodynamic means for suppressing vortex shedding. Journal of Wind Engineering and Industrial Aerodynamics, 1981, 7(2): 145-189 doi: 10.1016/0167-6105(81)90036-2 [18] Gu F, Wang J, Qiao X, et al. Pressure distribution, fluctuating forces and vortex shedding behavior of circular cylinder with rotatable splitter plates. Journal of Fluids and Structures, 2012, 28: 263-278 doi: 10.1016/j.jfluidstructs.2011.11.005 [19] Huera-Huarte FJ. On splitter plate coverage for suppression of vortex-induced vibrations of flexible cylinders. Applied Ocean Research, 2014, 48: 244-249 doi: 10.1016/j.apor.2014.09.002 [20] Assi GRS, Bearman PW, Kitney N. Low drag solutions for suppressing vortex-induced vibration of circular cylinders. Journal of Fluids and Structures, 2009, 25: 666-675 doi: 10.1016/j.jfluidstructs.2008.11.002 [21] Liang SP, Wang JS, Xu BH, et al. Vortex-induced vibration and structure instability for a circular cylinder with flexible splitter plates. Journal of Wind Engineering and Industrial Aerodynamics, 2018, 174: 200-209 doi: 10.1016/j.jweia.2017.12.030 [22] Wang JS, Zheng HX, Tian ZX. Numerical simulation with a TVD-FVM method for circular cylinder wake control by a fairing. Journal of Fluids and Structures, 2015, 57: 15-31 doi: 10.1016/j.jfluidstructs.2015.05.008 [23] Zhu HJ, Liao ZH, Gao Y, et al. Numerical evaluation of the suppression effect of a free-to-rotate triangular fairing on the vortex-induced vibration of a circular cylinder. Applied Mathematical Modelling, 2017, 52: 709-730 doi: 10.1016/j.apm.2017.07.045 [24] 赵莹. 附属短尾整流罩的立管涡激振动抑制效果评价. [硕士论文]. 成都: 西南石油大学, 2019Zhao Ying. Evaluation of vortex-induced vibration suppressive effect of a circular cylinder with an attached short-tail fairing. [Master Thesis]. Chengdu: Southwest Petroleum University, 2019 (in Chinese)) [25] Quen LK, Abu A, Kato N, et al. Performance of two- and three-start helical strakes in suppressing the vortex-induced vibration of a low mass ratio flexible cylinder. Ocean Engineering, 2018, 166: 253-261 doi: 10.1016/j.oceaneng.2018.08.008 [26] Gao Y, Fu SX, Ren T, et al. VIV response of a long flexible riser fitted with strakes in uniform and linearly sheared currents. Applied Ocean Research, 2015, 52: 102-114 doi: 10.1016/j.apor.2015.05.006 [27] Xu WH, Luan YS, Liu LQ, et al. Influences of helical strake cross-section shape on vortex-induced vibrations suppression for a long flexible cylinder. China Ocean Engineering, 2017, 31(4): 438-446 doi: 10.1007/s13344-017-0050-1 [28] Ma YX, Xu WH, Ai HA, et al. The effect of time-varying axial tension on VIV suppression for a flexible cylinder attached with helical strakes. Ocean Engineering, 2021, 241: 109981 doi: 10.1016/j.oceaneng.2021.109981 [29] Xu WH, Luan YS, Han QH, et al. The effect of yaw angle on VIV suppression for an inclined flexible cylinder fitted with helical strakes. Applied Ocean Research, 2017, 67: 263-276 doi: 10.1016/j.apor.2017.07.014 [30] Wu H, Sun DP, Lu L, et al. Experimental investigation on the suppression of vortex-induced vibration of long flexible riser by multiple control rods. Journal of Fluids and Structures, 2012, 30: 115-132 doi: 10.1016/j.jfluidstructs.2012.02.004 [31] Lu Y, Liao YY, Liu B, et al. Cross-flow vortex-induced vibration reduction of a long flexible cylinder using 3 and 4 control rods with different configurations. Applied Ocean Research, 2019, 91: 101900 doi: 10.1016/j.apor.2019.101900 [32] Xu WH, Qin WQ, Lu Y, et al. Application of control rods for passively suppressing cross-flow VIV of an inclined flexible cylinder. Shock and Vibration, 2018, 2018: 8365726 [33] 刘文博. 横向流诱发柱体的振动控制策略. [硕士论文]. 武汉: 华中科技大学, 2018Liu Wenbo. Control strategies of cross-flow induced vibration of cylinders. [Master Thesis]. Wuhan: Huazhong University of Science and Technology, 2018 (in Chinese)) [34] Dai H, Abdelkefi A, Wang L. Vortex-induced vibrations mitigation through a nonlinear energy sink. Communications in Nonlinear Science and Numerical Simulation, 2017, 42: 22-36 doi: 10.1016/j.cnsns.2016.05.014 [35] Vandiver JK, Ma L, Rao Z. Revealing the effects of damping on the flow-induced vibration of flexible cylinders. Journal of Sound and Vibration, 2018, 433: 29-54 [36] Ma YX, Xu WH, Pang T, et al. Dynamic characteristics of a slender flexible cylinder excited by concomitant vortex-induced vibration and time-varying axial tension. Journal of Sound and Vibration, 2020, 485: 115524 doi: 10.1016/j.jsv.2020.115524 [37] Franzini GR, Pesce CP, Goncalves RT, et al. An experimental investigation on concomitant vortex-induced vibration and axial top-motion excitation with a long flexible cylinder in vertical configuration. Ocean Engineering, 2018, 156: 596-612 doi: 10.1016/j.oceaneng.2018.02.063 [38] Song LJ, Fu SX, Cao J, et al. An investigation into the hydrodynamics of a flexible riser undergoing vortex-induced vibration. Journal of Fluids and Structures, 2016, 63: 325-350 doi: 10.1016/j.jfluidstructs.2016.03.006 -
下载:
点击查看大图
图(16) / 表(2)
计量
- 文章访问数: 450
- HTML全文浏览量: 97
- PDF下载量: 129
- 被引次数: 0
