工程桥梁多方向振动的测量与模态分析

Measurement and Modal Analysis of the Vibration of a Bridge in Multiple Directions

通过预先埋置在桥面铺装层内的压电式加速度传感器对桥梁振动进行多方向的测量,并对桥梁进行有限元模态分析。在测量中考察了匀速行驶和刹车两种车栽的影响,测得了20 m跨的预应力空心梁桥在不同载荷下的竖向和水平横向振动。综合试验测量和有限元分析结果,得到了这类桥梁运动车载作用下的非常规振动特性。

By piezoelectric acceleration sensors which have been embedded in the bridge deck pavement, the multiple directional vibrations of a bridge have been measured, and the vibration modes are analyzed of the bridge with FEM. The effects of vehicle with constant speeds and stop instantly are studied; the vertical and horizontal transverse accelerations of sections of a prestressed hollow beam bridge are measured. The results of measurement and FEM analysis show that the bridge may be incited irregular vibration by running vehicles.