摘要
假想台风下的波浪数值模拟是跨海桥隧工程风险评价的重要内容。风场的生成方法与不利路径的选择对于波浪模拟结果有极大影响。研究检验了在单一假想台风风场下进行波浪模拟的合理性,分析了台风路径对于工程区不同方向波浪影响的差异。通过构建珠江口台风浪数学模型,对采用风圈半径方法筛选出的104场台风路径,按300年一遇强度进行了蒙特卡罗模拟。结果表明,对西人工岛处波浪场有重大影响的不利台风路径处于珠江口100 km范围内。由此确定了体现不同特征的7条不利台风路径,为进一步研究极端天气条件下珠江口台风浪过程提供基础。研究成果为沿海河口地区易受台风影响的大型工程波浪要素分析提供方法支撑。
Numerical wave simulation under hypothetical typhoon conditions has a pivotal role in the risk assessment of cross-sea bridges and tunnels.The wind-field generation and the adverse track selection have a large influence on the wave simulation results.This study verified the rationality of wave simulation under a single hypothetical typhoon wind field and analyzed the effects of different typhoon tracks on the waves in different directions of the project area.A numerical wind-wave model in the Pearl River Estuary was constructed according to intensities based on a 300-yr return period and tested via Monte Carlo simulation,which was applied to 104 typhoon tracks selected by the radius method.The results show that the adverse tracks that significantly impact the wave field at the West Artificial Island are within 100 km of the Pearl River Estuary.Seven adverse typhoon tracks reflecting different characteristics were obtained,which provided a basis for further study of the typhoon wave process in the Pearl River Estuary under extreme weather conditions.This study provides methodological support for the wave parameter analysis of large-scale engineering at coasts and estuaries that are susceptible to typhoons.
作者
杨氾
潘军宁
王红川
YANG Fan;PAN Junning;WANG Hongchuan(Key Laboratory of Port,Waterway and Sedimentation Engineering of the Ministry of Transport,Nanjing Hydraulic Research Institute,Nanjing 210024,China)
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2019年第6期892-901,共10页
Advances in Water Science
基金
国家重点研发计划资助项目(2017YFC1404200)
国家自然科学基金资助项目(51520105014)~~
关键词
台风
波浪
数值模拟
台风路径
港珠澳大桥
tphoon
wave
numerical simulation
tphoon track
Hong Kong-Zhuhai-Macao Bridge
