Nuclear power floor spectrum artificial seismic wave fitting method based on objective wave waveform analysis

Abstract

The present invention belongs to the technical field of nuclear power equipment engineering anti-seismic safety analysis and evaluation, and relates to a nuclear power floor spectrum artificial seismic wave fitting method based on objective wave waveform analysis. The method is characterized by firstly analyzing and selecting an amplitude, a phase angle, a frequency and energy features of a floor spectrum objective wave; obtaining a target spectrum by performing uncertainty manual handling on a response spectrum of the objective wave; calculating a Fourier amplitude spectrum corresponding to the target spectrum; acquiring an initial artificial wave Fourier amplitude spectrum through linear combination of the objective wave and the Fourier amplitude spectrum from the target spectrum; defining an initial artificial wave by a phase spectrum and strength envelopes of the objective wave; and generating multiple groups of artificial waves by using the strength envelopes of the objective wave as controlling conditions during initial artificial wave iterative fitting, linearly dependent coefficients between the above acquired artificial waves and an energy curve and a time travel curve of the objective waves being index optimization floor spectrum artificial seismic waves. With adoption of the fitting method provided by the present invention, the floor spectrum artificial seismic waves have certain waveform features with target floor time-history response, and expression effects and engineering applicability of the floor spectrum artificial seismic waves can be raised.

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 ...

Examples

Embodiment Construction

[0043] Specific embodiments of the present invention will be described in detail below in conjunction with specific schemes and accompanying drawings.

[0044] The method in this embodiment is described by taking the artificial wave of the target floor spectrum fitted with a damping ratio of 5% as an example. Include the following steps:

[0045] (1) Analysis of the waveform characteristics of the target wave. The real floor response time history is selected as the target wave, such as Figure 2a ; Calculate its response spectrum, such as image 3 ;Determine the absolute value envelope of the target wave as the envelope of the artificial wave fitting process, such as Figure 2b .

[0046] Calculate the Fourier phase spectrum θ of the target wave 1 (w) and magnitude spectrum F 1 (w), such as Figure 2c .

[0047] Fourier magnitude spectrum F 1 (w), phase spectrum θ 1 (w) is defined as formula 1:

[0048] A ( w )...

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 ...

Examples

Embodiment Construction

[0043] Specific embodiments of the present invention will be described in detail below in conjunction with specific schemes and accompanying drawings.

[0044] The method in this embodiment is described by taking the artificial wave of the target floor spectrum fitted with a damping ratio of 5% as an example. Include the following steps:

[0045] (1) Analysis of the waveform characteristics of the target wave. The real floor response time history is selected as the target wave, such as Figure 2a ; Calculate its response spectrum, such as image 3 ;Determine the absolute value envelope of the target wave as the envelope of the artificial wave fitting process, such as Figure 2b .

[0046] Calculate the Fourier phase spectrum θ of the target wave 1 (w) and magnitude spectrum F 1 (w), such as Figure 2c .

[0047] Fourier magnitude spectrum F 1 (w), phase spectrum θ 1 (w) is defined as formula 1:

[0048] A ( w )...

Images