CFD-based aerodynamic characteristics of cable-stayed
|School||Southwest Jiaotong University|
|Course||Bridge and Tunnel Engineering|
|Keywords||Stay cables Aerodynamic characteristics Aerodynamic coefficients On the waterway CFD|
With the increase of the bridge span cable-stayed bridge becomes a primary election . Due to structural stiffness, damping and natural frequency decreases wind resistance stayed almost become its ability to secure the construction and operation of the key. The main components of stay cables as the cable-stayed bridge , one of the wind resistance is more important. In a variety of wind-induced vibration , vibration rain cable is a maximum amplitude vibrations will cause cable stays constantly changing , causing enormous economic losses. Therefore, the rain vibration under study aerodynamic characteristics of stay cables is very meaningful . This paper reviews the cable-stayed hazards rain vibration occurs , followed by the use of CFD numerical simulation method for the numerical analysis of cable-stayed . First, the state of the cable-stayed bare cable aerodynamic coefficients were analyzed and compared steady and unsteady analysis of the state of the cable-stayed bare cable aerodynamic coefficients to determine the subsequent calculations using the methods of analysis ; Meanwhile, the oblique Lasso bare cable aerodynamic characteristics of the state were two-dimensional and three-dimensional analysis , and a comparison between the two . Secondly, from the stay cable diameter to flow velocity , water shape, the size of waterways , waterway location in terms of the aerodynamic characteristics of stay cables with water two-dimensional analysis, discuss their aerodynamic coefficients for the cable impact , compared to the state of the cable-stayed bare cable aerodynamic coefficients and waterways cable stays with aerodynamic coefficients , then the values ??obtained were compared with the experimental results verify the influence of several factors on the cable above the rain vibration effects . Also studied with three-dimensional state waterway cable-stayed aerodynamic characteristics . Finally, with drops of water to simulate the cable-stayed , arranged in a single row from the water droplets and studied the layout of multi-row crossover cable aerodynamic coefficients , discusses the stay cables on the cable when the rain drops vibration affected.