本文将滑移理论与CFD技术相结合，考虑了风压力系数和风摩擦力系数随位置和时间的变化，并引入了Spalart-Allmaras(S-A)湍流模型，运用有限单元法，实现了对斜拉索的风雨激振现象的数值模拟；考察了不同风速下的水线形成及形态，并与已有实验成果进行比对，验证了方法的合理性和准确性；研究了水膜形态、气动力变化、斜拉索振动响应三者关系，得到了水线和拉索之间的振动耦合规律，探讨了风雨激振机理。结果表明，水线、气流和斜拉索之间的共振是引发风雨激振的主要因素之一。
Abstract
With lubrication theory and computational fluid dynamics(CFD) method combined , calculating wind pressure coefficient and wind friction coefficient changing with position and time, based on the finite element method and Spalart-Allmaras(S-A) turbulence flow model, a finite element model was built to simulate the rain-wind induced vibration (RWIV);To verify the veracity and rationality of this method，the formation and evolutions of rivulets under different wind speeds were studied，and compared with the existing experimental results .Through investigating the mutual influence among water film evolution, lift and vibration of cable, the mechanism of RWIV were analyzed. Similar to experimental results , the computing results showed that , the resonance among upper rivulet, lift and cable caused RWIV.
关键词
风雨激振 /
水线 /
气动力 /
斜拉索振动
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Key words
rain-wind induced vibration；rivulet；lift；vibration of cable
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参考文献
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