Numerical Fluid Flow Analysis for Aerodynamic Response Characteristics to Safety Desing of Wind Resistance of Grate Structure

(1)掌握串列索的尾迹驰动特性。通过数值分析，很可能是由于流的切换产生了一种振动力，使流型由外加速流转变为间隙流，从而增加了尾迹驰动现象产生的幅值。(2)箱梁桥的三维流动为了表达该方法的适应性，对箱梁桥的涡激振动进行了求解。数值计算结果与试验结果的比较表明，该方法可用于大型结构的抗风安全设计。

(1) To grasp the characteristics of Wake-galloping of tandem cableAs a result of numerical analyzes, that it is highly probable that the production of switching of flow causing the pattern of flow to change from outer accelerated flow to gap flow acts as a kind of vibromotive force to increase the amplitude produced in the wake galloping phenomenon.(2) Three dimensional flow of box girder bridgeTo express the adaptability of this method, the vortex excited oscillation of box girder bridge is solved. The comparisons of the numerical results with the experimental results exhibits that the present method can be devoted to the safety desing of the wind resistance of great structures.