桥梁动挠度计算速度积分方法

The calculation of dynamic deflection from bridge measuring velocity

提出数值积分的方法,利用二次插值法把两个采样周期的速度值拟合成速度函数,对此速度函数在第一个采样周期内进行定积分,获得桥梁在此时间段内的振动位移.该方法实现了从磁电式速度传感器中导出桥梁的动挠度信号.试验结果表明,该积分方法具有较高的实时性和准确性.

A numerical integration method is presented and the velocity function is deduced using quadratic interpolation smoothing in two sampling periods and integrated in the first sampling period. The dynamic deflection of bridge can be obtained in this period. Dynamic deflection is deduced from the signal of inertial transducer using the method. The experiment results show that the integration has the eharacterlstics of being more real-time and accurate.