中文摘要：

应用FLUENT中的SSTk-ω模型对不同风速下三维新月形、D形覆冰斜拉索的绕流场进行数值模拟，得到了0°～60°风攻角下的阻力系数、升力系数以及驰振力系数，并与直向拉索的模拟数据进行对比，进而研究风速、覆冰类型、风攻角以及斜向角度对拉索气动特性和驰振稳定性的影响规律。结果表明：风速、覆冰类型、风攻角以及斜向角度对覆冰斜拉索的阻力系数、升力系数均有影响，且影响规律不尽相同；经过计算，在特定风攻角处，覆冰斜拉索的驰振力系数小于0，具有发生覆冰驰振的可能性；通过比较各模拟数据，可以看出直索不能代替斜拉索进行数值模拟来研究其气动特性及驰振稳定性。

英文摘要：

The flow fields of3D crescent-shaped and D-shaped iced stay cables under different wind speeds are simulated respectively applying SST k-ωmodel of FLUENT code.The drag and lift coefficients and galloping coefficients of the iced stay cables with0°~60°wind attack angles are computed and compared with the simulation data of the straight cables.The influences of wind speed,icing type,wind attack angles and oblique angles on the aerodynamic characteristics and galloping stability of the stay cables are studied.The results show that the wind speed,the icing type,the wind attack angles and the oblique angles have some influences on the drag and lift coefficients,but the influence rules are different.Galloping coefficients of the iced stay cables with some particular wind attack angles are negative.So,these stay cables have the possibility of galloping vibration.Through mutual comparison of the simulation data,it is found that the stay cables cannot be represented by the straight cables in numerical simulation analysis of the aerodynamic characteristics and galloping stability.