摘要
针对大海带东桥引桥断面和苏通长江公路大桥主梁断面,基于确定性涡方法进行静三分力系数及Strouhal数(St)雷诺数效应分析,采用粒子强度交换法(PSE)粘性扩散处理。和风洞试验值对比显示,数值计算结果有着合理的可信度。数值计算也显示雷诺数对这两种截面的静三分力系数及St影响不可以忽略;对苏通桥主梁断面在雷诺数在1×105和1×106范围时,St数受雷诺数影响很大,而这个范围内用试验的值来得到实桥的St数是非常困难的。
In this paper, aerostatic coefficients, Strouhal number （St） and Reynolds number （Re） of Great Belt East Bridge and Sutong Bridge are investigated based on deterministic vortex method （DVM）. In this method, particle strength exchange （PSE） is chosen to implement the simulation of the flow around bluff body and to analyze the microscopic mechanics of the static load arid Reynolds number effect. Compared with the results obtained from wind tunnel tests, reliability of numerical simulation can be proved. Numerical results also show that the Reynolds number effect on aerostatic coefficients and St of the two bridges can not be neglected. In the range of Reynolds number from 1×10^5 to 1 ×10^6, it has great effect on St for Sutong Bridge. In this range, the Strouhal number is difficult to obtain from wind tunnel tests.
出处
《空气动力学学报》
EI
CSCD
北大核心
2009年第6期664-670,共7页
Acta Aerodynamica Sinica
基金
国家自然科学基金项目资助(50878148
50738002
50708073)
关键词
桥梁断面
雷诺数效应
粒子强度交换方法
静三分力系数
St数
bridge sections
Reynolds number effect
particle strength exchange method
aerostatic coefficients
Strouhal number
