Seismic wave acceleration integration processing method and system
A technology of acceleration integration and processing methods, which is applied in the direction of measuring devices, vibration testing, and testing of machine/structural components, etc. It can solve problems such as high signal frequency requirements, hardware integration circuit precision limitations, and the inability to measure seismic wave signals, etc. , to achieve the effect of fast and accurate calculation
Active Publication Date: 2020-01-07
ZHEJIANG UNIV
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Problems solved by technology
In actual use, the accuracy of the hardware integration circuit is easily limited by the hardware itself, and the frequency of the signal is high, and generally cannot be used to measure signals that contain more frequency components like seismic waves.
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[0063] The present invention will be further described below in conjunction with drawings and embodiments.
[0064] figure 1 It is a flow chart of the seismic wave acceleration integral processing method of the present invention; this example selects typical seismic wave El Centro east-west direction (hereinafter referred to as El Centro-EW) acceleration data as input, sampling frequency 50Hz, maximum peak value 0.2g, duration 54s. The seismic wave time history curve is as figure 2 shown.
[0065] The seismic wave is directly numerically integrated using the trapezoidal formula to obtain the velocity; the velocity is numerically integrated to obtain the displacement signal. The time-history curves of acceleration, velocity and displacement obtained after integration are as follows: image 3 shown. It can be found that the integrated velocity time history deviates from zero at the end, and the displacement time history obviously contains trend items, which do not conform t...
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The invention discloses a seismic wave acceleration integration processing method and system which is used for a seismic simulation experiment. The method comprises a baseline calibration step, a filtering step, a frequency domain integration step and a four-point interpolation step. Seismic waves processed with the method are acceleration signals acquired by a seismograph in the real seismic environment. The baseline calibration prevents direct numerical integration from causing the baseline drift phenomenon and enables seismic time history termination acceleration and speed values to be 0; the band-pass filtering removes the instability of an amplifier of a seismic acquisition device and the high-frequency noise introduced by the surrounding environment; the frequency domain integrationeliminates the accumulated error caused by numerical integration; and the four-point interpolation effectively expands data to meet seismic simulation test conditions. The method can quickly and accurately calculate the calibrated acceleration, speed and displacement signals, thereby efficiently restoring the real seismic physical environment.
Description
technical field [0001] The invention belongs to the technical field of earthquake research, and in particular relates to a seismic wave acceleration integral processing method and system. Background technique [0002] The seismic simulation shaking table can reproduce the seismic process well in the laboratory and conduct artificial seismic wave experiments. It is the most direct method to study the seismic response and failure mechanism of structures at present. According to the test requirements, the scale models (or full-size components) of various structures can be simulated and reproduced on the shaking table platform to reproduce the seismic waveform vibration or achieve a specific movement, and the performance of the tested structure can be used as a component after a certain degree of similar conversion. Reference for prototypes in real vibration situations. With the rapid development of fields such as hydraulics, electronics, sensors, signal processing and control,...
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Login to View More IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 许博雅贺诗波史治国陈积明
Owner ZHEJIANG UNIV