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