用粘弹性阻尼器抑制铁路钢桥车—桥共振

Vibration Reduction of Railway Steel Bridge Excited by Vehicles Using Viscoelastic Damper

研究用粘弹性阻尼器抑制铁路钢桥在列车通过时车—桥共振的方法，编制了用应变能法计算加入粘弹性阻尼器后附加模态阻尼比及列车与桥梁动力相互作用的计算机程序，利用仿真计算可模拟加入粘弹性阻尼器前后列车通过时钢梁的振动情况．

The method that reducing the vibration of railway steel bridge excited by vehicles using viscoelastic damper is researched. The structural modal damping ratio is calculated using the modal strain energy method in conjunction with the finite element method. The dynamic response of vehicle bridge system with and without viscoelastic damper is performed by computer. The simulating results preliminary show: It is effective that using the suggested method to reduce the short or middle span steel bridge displacement out of limited causing by velocity increasing.