Artificial Wave Fitting Method for Nuclear Power Floor Spectrum Based on Target Waveform Analysis

Abstract

The invention belongs to the technical field of seismic safety analysis and evaluation of nuclear power equipment engineering, and relates to an artificial seismic wave fitting method for nuclear power floor spectrum based on target wave waveform analysis. It is characterized by first analyzing the target wave amplitude, phase angle, frequency and energy characteristics of the selected floor spectrum; the target spectrum is obtained by artificially processing the uncertainty of the target wave response spectrum; calculating the Fourier amplitude spectrum corresponding to the target spectrum; linearly combining the target Wave and the Fourier amplitude spectrum derived from the target spectrum to obtain the initial artificial wave Fourier amplitude spectrum; the initial artificial wave is defined by the phase spectrum and intensity envelope of the target wave; the intensity envelope of the target wave is used for the iterative fitting of the initial artificial wave Line is the control condition to generate multiple groups of artificial waves, and the linear correlation coefficient between them and the energy curve of the target wave and the time history curve is used as the index to optimize the artificial wave of the floor spectrum. The invention can make the floor spectrum artificial wave have a certain waveform characteristic of the target floor time course response, and can improve the expression effect and engineering applicability of the floor spectrum artificial wave.

Description

technical field [0001] The invention relates to a nuclear power floor spectrum artificial seismic wave fitting method based on target wave waveform analysis, and belongs to the technical field of seismic safety analysis and evaluation of nuclear power equipment engineering. Background technique [0002] Ensuring the safety of nuclear power is the key to ensuring the smooth implementation and safe operation of nuclear power plants. The key to ensuring the anti-seismic safety of nuclear power plants is that the nuclear safety-level engineering structures and equipment of nuclear power plants must meet the structural integrity and operational feasibility under OBE and SSE earthquake conditions. basic requirements of sex. Compared with the ultimate seismic bearing capacity of nuclear power engineering structures, the normal operation of safety-level nuclear power equipment is often one of the more concerned control conditions, and the seismic analysis of nuclear power equipment ...

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Problems solved by technology

[0010] However, the above-mentioned artificial wave fitting process only obtains the power spectrum, that is, the average Fourier spectrum, from the approximate relationship of the target response spectrum. At the same time, random phase angles are used, which do not reflect the waveform characteristics of the target wave; the intensity envelope in the iterative process is generally also For statistical results, it is believed that it is related to factors such as the magnitude of the earthquake and the distance from the epicenter, not for a certain target wave

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