一种新型阻尼器的研究

桥梁横向振幅超限一直是困扰铁路桥梁的一个重要问题。在全国铁路全面提速的大环境下,这个问题益发突出,列车速度的提高势必造成更大的桥梁横向位移,进而给行车安全造成不利的影响。传统的桥梁横向振动控制方法主要是通过改变桥梁自身刚度,达到减小桥梁振动响应的目的,但成本较高,经济性较差。耗能减振思想的提出为桥梁横向振动控制提供了一种新的思路,即用阻尼器加固桥梁。阻尼器的安装能够将输入桥梁的能量转化为阻尼器的滞回能,通过阻尼器的往复加卸载循环,先于结构消耗输入能量。这种方法的优势在于经济节省,易于更换,但目前国内缺乏该类型阻尼器产品及相关的应用研究。本文研究的正是这种新型阻尼器。

Research on a new type of damper

The over-limit of transverse amplitude of bridge has always been an important problem in railway Bridges. In the overall speed of the national railway environment, this problem is more and more prominent, the increase of train speed is bound to cause greater lateral displacement of the bridge, and then have an adverse impact on traffic safety. The traditional bridge lateral vibration control method is mainly to reduce the bridge vibration response by changing the bridge stiffness, but the cost is high and the economy is poor. The idea of energy dissipation and vibration reduction provides a new idea for transverse vibration control of Bridges, which is to reinforce Bridges with dampers. The installation of the damper can convert the input energy of the bridge into the hysteretic energy of the damper, and consume the input energy before the structure through the reciprocating loading and unloading cycle of the damper. The advantage of this method is that it is economical and easy to replace, but there is a lack of this type of damper products and related application research in China. It is this new type of damper that is studied in this paper.