非线性畸形波所致的平台底部砰击载荷及结构响应数值模拟

doi:10.16183/j.cnki.jsjtu.2018.09.001

上海交通大学学报（自然版） ›› 2018, Vol. 52 ›› Issue (9): 1009-1016.doi: 10.16183/j.cnki.jsjtu.2018.09.001

• 学报（中文） • 下一篇

非线性畸形波所致的平台底部砰击载荷及结构响应数值模拟

秦浩，唐文勇，薛鸿祥

上海交通大学海洋工程国家重点实验室；高新船舶与深海开发装备协同创新中心，上海 200240

出版日期:2018-09-28 发布日期:2018-09-28
通讯作者: 唐文勇, 男, 教授, 博士生导师, E-mail:wytang@sjtu.edu.cn.
作者简介:秦浩(1990-), 男, 山东省烟台市人, 博士生, 主要研究方向为畸形波与海洋结构物相互作用.
基金资助:
国家自然科学基金资助项目(51239007)

Numerical Simulations of Impact Loads and Structural Responses of Bottom Decks of Platforms Caused by Nonlinear Freak Waves

QIN Hao,TANG Wenyong,XUE Hongxiang

State Key Laboratory of Ocean Engineering; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China

Online:2018-09-28 Published:2018-09-28

摘要/Abstract

摘要： 基于求解2维N-S方程和流体体积(VOF)法建立数值水槽，采用Peregrine呼吸子解模型进行非线性畸形波的造波，采用2维有限元法对平台下甲板结构离散，并以一种流固耦合算法针对非线性畸形波平台底部砰击进行数值模拟.计算了该砰击问题中非线性畸形波引起的砰击载荷，并揭示了其与相同波高、波长2阶规则波引起砰击载荷的不同.考虑平台下甲板结构为弹性体的结构响应，在平台下甲板结构存在垂向初速度的条件下得到了平台下甲板结构位移时历，并采用快速傅里叶变换(FFT)对频率响应进行了分析.

关键词: 非线性畸形波, Peregrine呼吸子解, 流固耦合, 结构响应, 平台底部砰击

Abstract: In order to study the impact on offshore platforms caused by nonlinear freak waves, a numerical wave tank is built, in which the incompressible Navier-Stokes equations are solved, with the free surfaces reconstructed using a VOF method. Nonlinear freak waves based on the Peregrine breather solution are generated. A fluid-structure interaction (FSI) algorithm is used to calculate the structural response of the bottom deck, which is discretized with the finite element method (FEM). The impact loads underneath a platform model are calculated and compared with the ones caused by the 2nd-order regular waves with the same wave lengths and heights to reveal the unique features of the impact caused by nonlinear freak waves. The structural response of the bottom deck is calculated using the FSI algorithm and processed with an FFT method to analyze the wetted vibration. Additionally, the influence of the vertical initial velocity is considered during the structural response simulations.

Key words: nonlinear freak wave, Peregrine breather, fluid-structure interaction (FSI), structural response, impact underneath the bottom deck

中图分类号:

P 751

秦浩，唐文勇，薛鸿祥. 非线性畸形波所致的平台底部砰击载荷及结构响应数值模拟[J]. 上海交通大学学报（自然版）, 2018, 52(9): 1009-1016.

QIN Hao,TANG Wenyong,XUE Hongxiang. Numerical Simulations of Impact Loads and Structural Responses of Bottom Decks of Platforms Caused by Nonlinear Freak Waves[J]. Journal of Shanghai Jiaotong University, 2018, 52(9): 1009-1016.

参考文献

［1］邓燕飞, 杨建民, 李欣, 等. 波浪水池中畸形波生成的研究综述［J］. 船舶力学, 2016, 20(8): 1059-1070. DENG Yanfei, YANG Jianmin, LI Xin, et al. A review on the freak wave generation in the wave tank［J］. Journal of Ship Mechanics, 2016, 20(8): 1059-1070. ［2］KHARIF C. Physical mechanisms of the rogue wave phenomenon［J］. European Journal of Mechanics—B/Fluids, 2003, 22(6): 603-634. ［3］裴玉国. 畸形波的生成及基本特性研究［D］. 大连: 大连理工大学, 2007. PEI Yuguo. The generation of freak waves and its behaviors［D］. Dalian: Dalian University of Technology, 2007. ［4］HU Z, TANG W, XUE H. A probability-based superposition model of freak wave simulation［J］. Applied Ocean Research, 2014, 47(9): 284-290. ［5］ZAKHAROV V E. Stability of periodic waves of finite amplitude on the surface of a deep fluid［J］. Journal of Applied Mechanics & Technical Physics, 1968, 9(2): 190-194. ［6］PEREGRINE D H. Water waves, nonlinear Schrdinger equations and their solutions［J］. Anziam Journal, 1983, 25(1): 16-43. ［7］CHABCHOUB A, HOFFMANN N P, AKHMEDIEV N. Rogue wave observation in a water wave tank.［J］. Physical Review Letters, 2011, 106(20): 309-313. ［8］PERI R, HOFFMANN N, CHABCHOUB A. Initial wave breaking dynamics of Peregrine-type rogue waves: A numerical and experimental study［J］. European Journal of Mechanics—B/Fluids, 2015, 49(12): 71-76. ［9］HU Z, TANG W, XUE H, et al. Numerical study of Rogue waves as nonlinear Schrdinger breather solutions under finite water depth［J］. Wave Motion, 2015, 52: 81-90. ［10］CLAUSS F, SCHMITTNER C E, STUTZ K. Freak wave impact on semisubmersibles-time-domain analysis of motions and forces［C］∥The Thirteenth International Offshore and Polar Engineering Conference. Honolulu, Hawaii, USA: ［s.n.］, 2003. ［11］ZHAO X, YE Z, FU Y, et al. A CIP-based numerical simulation of freak wave impact on a floating body［J］. Ocean Engineering, 2014, 87(5): 50-63. ［12］DENG Y, YANG J, ZHAO W, et al. Freak wave forces on a vertical cylinder［J］. Coastal Engineering, 2016, 114: 9-18. ［13］LIN P. A fixed-grid model for simulation of a moving body in free surface flows［J］. Computers & Fluids, 2007, 36(3): 549-561. ［14］丁仕风, 唐文勇, 张圣坤. 速度突变情况下液化天然气船液舱内晃荡问题的仿真［J］. 上海交通大学学报, 2008, 42(6): 919-923. DING Shifeng, TANG Wenyong, ZHANG Shengkun. Simulation of liquid sloshing in the cabin caused by liquefied natural gas ship’s variable speed［J］. Journal of Shanghai Jiao Tong University, 2008, 42(6): 919-923. ［15］CHIANG C M. The applied dynamics of ccean surface waves［M］. ［s.l.］: Wiley, 1983. ［16］HU Z, TANG W, XUE H, et al. Numerical simulations using conserved wave absorption applied to Navier-Stokes equation model［J］. Coastal Engineering, 2015, 99: 15-25. ［17］BAARHOLM R, FALTINSEN O M. Wave impact underneath horizontal decks［J］. Journal of Marine Science and Technology, 2004, 9(1): 1-13.

[1]	何金辉, 李明广, 陈锦剑, 夏小和. 考虑动态流体网格的颗粒-流体耦合算法[J]. 上海交通大学学报, 2021, 55(6): 645-651.
[2]	张宇, 王晓亮. 基于显式动力学的软式飞艇流固耦合计算框架[J]. 上海交通大学学报, 2021, 55(3): 311-319.
[3]	田新亮. “软尾减阻”述评[J]. 上海交通大学学报, 2021, 55(2): 213-214.
[4]	郑启宇，夏小和，李明广，张扬清. 深基坑降承压水对墙体变形和地表沉降的影响[J]. 上海交通大学学报, 2020, 54(10): 1094-1100.
[5]	于鹏垚，赵勇，王天霖，甄春博，苏绍娟. 基于半解析砰击模型的弹性楔形体入水冲击分析[J]. 上海交通大学学报（自然版）, 2019, 53(2): 179-187.
[6]	刘广, 尚宇晴, 许泉, 俞刘建, 樊浩. 单侧提拉发射系统流固耦合动力学仿真[J]. 空天防御, 2019, 2(1): 14-21.
[7]	单铁兵，沈志平. 深水半潜式平台的涡激运动I.关键特性研究[J]. 上海交通大学学报（自然版）, 2017, 51(12): 1493-1503.
[8]	王小庆a,b，金先龙a,b，曹源a. 大规模输水隧道水锤效应三维数值模拟[J]. 上海交通大学学报（自然版）, 2016, 50(01): 98-102.
[9]	程演, 张璐璐, 张磊, 王建华. 基于随机场的非饱和土固结分析[J]. 上海交通大学学报, 2014, 48(11): 1528-1535.
[10]	何小二,王德禹. 支持向量机近似模型的参数选取及其在结构优化中的应用[J]. 上海交通大学学报（自然版）, 2014, 48(04): 464-468.
[11]	胡世良a，鲁传敬a,b，何友声a,b. 平板流固耦合振动的数值分析[J]. 上海交通大学学报（自然版）, 2013, 47(10): 1487-1493.
[12]	刘婧, 陈锦剑, 王建华. 上海世博500 kV地下变基坑降水流固耦合分析[J]. 上海交通大学学报, 2010, 44(06): 721-725.

非线性畸形波所致的平台底部砰击载荷及结构响应数值模拟

Numerical Simulations of Impact Loads and Structural Responses of Bottom Decks of Platforms Caused by Nonlinear Freak Waves

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 12

编辑推荐

Metrics

本文评价