带有颗粒阻尼器窨井盖的减振机理及实验研究

Experimental Study on Vibration Reduction of Manhole Cover with Particle Damper

由行驶车辆冲击造成窨井盖周边路面的松散破坏,会影响交通安全和增加道路维护成本。针对这一问题提出了一种带有颗粒阻尼器的减振型窨井盖,研究了该新型窨井盖的冲击减振特性。首先设计出带有颗粒阻尼器的新型窨井盖结构;其次理论探讨了新型窨井盖的结构耗能机理和影响参数;最后通过实验来研究新型窨井盖的冲击减振特性。结果表明带有颗粒阻尼器的窨井盖具有较好的冲击减振特性,颗粒阻尼器的阻振体尺寸、颗粒大小和填充率对窨井盖的冲击减振特性都有较大的影响,这为新型减振窨井盖的进一步优化和工程应用提供了有益指导,同时也为延长路面破损周期和降低道路维护成本提供了新的思路。

The pavement distress surrounding manhole cover can affect traffic safety and increase road maintenance costs, which is caused by the impact of moving vehicles. To solve this problem, a new manhole cover combined with particle damper is proposed and its impact-resistance performance is studied. First, a new kind of manhole cover structure with a particle damper is designed. Then its vibration reduction mechanism and sensitive parameters affecting the damping characteristics are discussed. Finally, the experiments are conducted to verify the impact-resistance performance of the new-type manhole cover. The results show that the new-type manhole cover have better impact-resistance perfonnwwe which are affected by cavity size, particle size and fiUing rate. It provides a useful guidance to optimize the impact-resistance performance of the new-type manhole cover and introduce a new way to prolong the road life cycle and reduce the road maintenance costs.