论文部分内容阅读
对主跨274m的邕江大跨度军用组合吊桥进行了节段模型风洞试验,测取了三分力系数曲线、气动导数及颤振临界风速。本文依据风洞静力试验的结果,按准定常空气力理论进行分析,并导出一个简化公式,计算了该类桥型的颤振临界风速,与动力试验测得的临界风速值相当吻合。为进一步探讨准定常理论的适用范围及实际工程应用有一定的参考价值。本文结果将用于组合吊桥系列化设计。
The section model wind tunnel test was conducted on the long-span military composite suspension bridge with a span of 274m on the main span, and the third-component force coefficient curve, aerodynamic derivative and flutter critical wind speed were measured. In this paper, based on the results of wind tunnel static test and the theory of quasi-steady aerodynamics, a simplified formula is derived and the flutter critical wind speed of this type of bridge is calculated, which is in good agreement with the critical wind speed measured by dynamic test. In order to further explore the scope of the application of practical theory and practical engineering applications have some reference value. The result of this paper will be used to design a series suspension bridge.