连通管液压动态特性试验研究

The accuracy analysis of pressure connected pipe bridge deflection monitoring system

连通管桥梁位移监测系统中,液体作为系统位移测量的传感元件,其动态特性研究的滞后一直制约着其在动态测量的应用.文章通过模型试验模拟实际桥梁的振动,测量连通管内液体的压强变化,研究连通管内液体压强与其振动状态的关系.研究结果显示:连通管压强不仅与结构位移有关,还与结构振动加速度及连通管纵向布置倾角有关;结构振动加速度、连通管倾角与管内压强变化存在正相关关系.

In the connecting pipe bridge displacement monitoring system, liquid is the system displacement measurement sensor element. The dynamic characteristics of the lag has been restricting the application of hy-draulic connecting pipe dynamic measurement. In this paper, a model test was made to simulate the vibration of the bridge. And the variation of pressure of the liquid within the communicating pipe was measured. Still the re-lationship of the fluid pressure of the communicating tube and its vibration state was studied in this text. The re-sults show that the connecting pipe pressure is not only related to the structural displacement but also related to the structural vibration acceleration and longitudinally arranged inclination of the connecting pipe. We also find that the relationship of the variation of the tube pressure and the structural vibration acceleration, inclination of the connecting pipe is positive correlation.