Quick bridge impact coefficient determination method
An impact coefficient, rapid determination technology, applied in impact testing, measuring devices, electrical digital data processing and other directions, can solve the problems of expensive equipment, high requirements under the bridge, difficult to achieve, etc., and achieve good low-frequency trend items and high-frequency Interference noise, removal of low frequency trend items and high frequency interference noise, low cost effect
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[0023] Example 1: Combining figure 1 , a method for quickly determining the impact coefficient of a bridge, comprising the following steps:
[0024] Step 1. Record the vertical vibration velocity signal of the main girder when the loading vehicle passes through the mid-span section at different speeds: the loading vehicle passes the bridge at a uniform speed in the designated lane at different speeds, and uses a low-frequency speed sensor to measure the mid-span section of the bridge structure at different speeds. Vertical vibration velocity signal at vehicle speed.
[0025] Step 2. Integrate the velocity signal in the frequency domain to obtain the displacement signal, that is, the dynamic deflection curve of the bridge: Band-pass the collected velocity time-domain signal (when the vertical first-order bending vibration frequency of the bridge is 1Hz, the bandwidth can be selected as 0.5 Hz~1.5Hz) filtering and noise reduction processing, and then perform fast Fourier (FFT) ...
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