本文選題：風(fēng)雨激振　切入點(diǎn)：水線　出處：《振動(dòng)與沖擊》2017年11期

【摘要】：將滑移理論與CFD技術(shù)相結(jié)合,考慮了風(fēng)壓力系數(shù)和風(fēng)摩擦因數(shù)隨位置和時(shí)間的變化,并引入了Spalart-Allmaras(S-A)湍流模型,運(yùn)用有限單元法,實(shí)現(xiàn)了對斜拉索的風(fēng)雨激振現(xiàn)象的數(shù)值模擬;考察了不同風(fēng)速下的水線形成及形態(tài),并與已有實(shí)驗(yàn)成果進(jìn)行比對,驗(yàn)證了方法的合理性和準(zhǔn)確性;研究了水膜形態(tài)、氣動(dòng)力變化、斜拉索振動(dòng)響應(yīng)三者關(guān)系,得到了水線和拉索之間的振動(dòng)耦合規(guī)律,探討了風(fēng)雨激振機(jī)理。結(jié)果表明,水線、氣流和斜拉索之間的共振是引發(fā)風(fēng)雨激振的主要因素之一。
[Abstract]:The slip theory and CFD technique are combined to consider the variation of wind pressure coefficient and wind friction coefficient with the position and time. Spalart-Allmaras S-A) turbulence model is introduced, and the finite element method is used to simulate the wind and rain excitation phenomenon of stay cables. The formation and shape of waterline under different wind speeds were investigated, and compared with the experimental results, the rationality and accuracy of the method were verified, and the relationships among water film shape, aerodynamic change and vibration response of stay cable were studied. The vibration coupling law between waterline and cable is obtained and the mechanism of wind-induced vibration is discussed. The results show that the resonance between waterline, airflow and stay cable is one of the main factors causing wind-induced vibration.
【作者單位】： 天津大學(xué)建筑工程學(xué)院;濱海土木工程結(jié)構(gòu)與安全教育部重點(diǎn)實(shí)驗(yàn)室;天津城建大學(xué)土木工程學(xué)院;天津軟土特性與工程環(huán)境重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51408399)
【分類號】：U441.3

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