近岸波生流数值计算的一种新方法

基金项目: 回国留学人员科研资助项目(编号:2117).

A new model for analyses of nearshore current

1.
State Key Laboratory of Estuarins & Coastal Research. East China Normal University, Shanghai 200062
2.
Institute of Engineering Mechanics, University of Tsukuba, Ibaraki 305, Japan

摘要: 运用Hardy-Cross法的基本原理建立了一种波生流计算的数值模型.本方法在维持计算稳定性方面表现出色,解决了以往的计算方法所存在的计算不稳定的根本缺陷,但是运用这一方法进行实际问题计算时还明显存在计算收敛缓慢的现象,对此,在探讨计算收敛原因的基础上,提出了同心矩形回路补正、粗网格计算初始值等对策.运用这些对策成功地提高了计算的效率和精度.最后通过计算例验证表明,运用本方法既能有效地维持计算的稳定,又能有效地解决局部缓和法所固有的计算效率低的问题,从而为研究和预测海岸工程对地形及环境变化影响问题提供了合理、实用的方法.
- 波生流 /
- 辐射应力 /
- 循环补正 /
- 残差
Abstract: An improvement method has been investigated for the practical application of nearshore current analysis using Hardy-Cross method.For this purpose,applications of concentric rectangular circuit correction,initial value insertion using coarse grid,and multi-grid method are introduced.As a result,it is dearly understood that the slow -convergence problem of Hardy-Cross method can be solved with much accuracy.
- Nearshore /
- radiation stess /
- circuit correction /
- residual errors