Long-span cable-supported bridges are gaining considerable importance in the world. It is generally recognized that long-span cable-supported bridges can be very sensitive to wind effects due to their aerodynamic properties and deck flexibility. Flutter is usually a major concern because it can lead to structural deck failure. This communication introduces a prototype of gyroscopic device as an active stabilizer for improving flutter performance. A mathematical model of the gyroscopic device, installed at the bridge deck level, was studied and implemented to assess its effectiveness in increasing the critical wind speed. A preliminary study was conducted to evaluate the stabilizer’s performance on a benchmark long-span cable-supported bridge as a function of its gyricity. The results demonstrate that the gyroscopic stabilizer is very successful and bridge flutter threshold increases with the gyricity of the gyroscopic device, within a practical operational range.

大跨度斜拉桥在世界范围内正变得越来越重要。通常认为，大跨度的电缆支撑桥由于其空气动力学特性和甲板灵活性而对风影响非常敏感。颤振通常是一个主要问题，因为它可能导致结构甲板故障。该交流介绍了陀螺仪设备的原型，作为提高颤振性能的主动稳定器。研究并实施了安装在桥面甲板上的陀螺仪的数学模型，以评估其在提高临界风速方面的有效性。进行了初步研究，以评估基准大跨度斜拉桥在稳定器性能方面的性能。