几种桥墩概化方法在MIKE 21FM模型中的应用及适用性分析

Analysis of Several Methods for Generalizing Piers in MIKE 21FM

为更好利用MIKE21FM模型进行桥渡水力计算,将直接模拟法、加糙法、等效阻水面积法和地形折算法几种桥墩概化方法应用于MIKE21FM模型。通过一个工程计算实例,综合比较几种概化方法在模拟准确度、计算效率和建模难度等方面的优劣。建议根据不同类型工程的精度和计算效率需求,采用适合的桥墩概化方法,以获得满足工程需要的效果。

In order to make better use of MIKE 21 FM for hydraulic calculation of bridge crossing, several methods for generalizing piers are applied in MIKE 21 FM, such as method of direct simulation, adding resistance, equivalent preventing-water area, and modifying topography. This paper analyzes the advantages and disadvantages of these methods in accuracy, calculation efficiency and the difficulty of modeling by taking an engineering calculation as example. It is recommended to adopt the appropriate method for generalizing piers according to the accuracy and calculation efficiency requirements of different types of projects to meet the needs of the project.