大连长海大桥不同驱动设计流速数值模拟研究  

Numerical Simulation of Design Flow Velocity in the Dalian Changhai Bridge Area Under Different Tide Patterns

作　　者：周涛 边淑华 朱子晨 于凯 迟万清 ZHOU Tao;BIAN Shuhua;ZHU Zichen;YU Kai;CHI Wanqing(First Institute of Oceanography,MNR,Qingdao 266061,China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061

出　　处：《海岸工程》2024年第4期285-295,共11页Coastal Engineering

基　　金：国家重点研发计划项目(2022YFC2803800);山东省自然科学基金项目(ZR2022QD042);山东省海洋环境地质工程重点实验室开放基金项目(MEGE2024011)。

摘　　要：设计流速是海洋工程的重要参数,驱动条件对设计流速的计算具有重要作用。目前尚无通用成熟的驱动条件的计算方法。本文以大连长海大桥工程海域实测海流为验证条件,利用数值模拟方法,构建大连长山群岛海域平面二维潮流模型,并模拟了在不同边界驱动条件下,长海大桥工程海域潮流场变化及设计流速取值,探究不同驱动条件对模拟结果的影响。计算结果表明:相较于“天文潮+不同重现期增水”驱动和“不同重现期潮差”驱动,“不同重现期潮差+相应重现期风海流”驱动计算得到的设计流速与经验的调和分析法推算结果更为接近,更具备工程参考价值。The design flow velocity is an important parameter in ocean engineering.The design tide pattern,as one of the commonly used drive conditions,plays an important role in the calculation of design flow velocity.However,there is currently no universal and mature method for calculating the design tide patterns.In this study,a two-dimensional tidal flow model used in the sea area of the Dalian Changshan Archipelago is built up by numerical simulation and validated by using the current data measured in the Dalian Changhai Bridge area.By using this model,the changes of tidal flow field and the values of design flow velocity in the Changhai Bridge area are simulated under different boundary conditions of the design tide pattern,and the influences of the different drive conditions on the simulated results are studied.The results show that compared to the results worked out using the tide patterns such as‘astronomical tide+increase water in different recurrence period’and‘tidal range in different recurrence period’,the design flow velocities worked out using‘tidal range in different recurrence period+wind-driven current in corresponding recurrence period are even more close to those calculated out by using the empirical harmonic analysis methods and can provide more valuable reference for the ocean engineering.

关 键 词：大连长海大桥 驱动条件 设计流速 调和分析法 数值模拟方法 

分 类 号：P731.2[天文地球—海洋科学]