Operation bridge vibration and health state abnormity early warning method based on three-dimensional diagram
A state-of-health, three-dimensional map technology, applied to vibration measurement in solids, vibration measurement, testing of mechanical components, etc. High energy, sensitive to damage, robust to noise
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Embodiment 1
[0048] The implementation process of the method for early warning of bridge structure vibration and abnormal health status in the present invention is as follows: figure 1 As shown, the specific steps of an operation bridge vibration and abnormal health state early warning method based on a three-dimensional graph of time, frequency and energy are as follows:
[0049] S1. Arranging one or more acceleration sensors on the bridge structure to test the acceleration response signal;
[0050] S2. Preprocessing the acceleration response signal obtained by the acceleration sensor test, such as removing data when the sensor is abnormal, and performing de-drifting and other processing;
[0051] S3, performing a windowing function on the acceleration response signal with a specified time length in advance;
[0052] S4. Perform power spectrum calculation and power spectrum average calculation on the acceleration response signal of the windowing function;
[0053] S5. Draw the power spe...
Embodiment 2
[0067] For example Figure 8 Numerical simulation research is carried out on the simply supported beam under the action of the moving load shown in order to further demonstrate the method for early warning of vibration and abnormal health status proposed by the present invention.
[0068] The simply supported beam with constant section is 60 meters long, the cross section is rectangular, the Young's modulus is 206GPa, and the linear density is 90000.6kg / m 2 , the two ends of the beam are simply supported, and the upper surface of the simply supported beam uses moving loads that move from the left to the right and from the right to the left at a constant speed to simulate the vehicle. The number, weight, and speed of the moving load are generated by random numbers to simulate According to the traffic flow of the actual bridge, a vertical acceleration sensor is installed on the simply supported beam at three-eighths away from the left end support.
[0069] The specific implemen...
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