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Multi-damping artificial wave fitting method for constructing multi-parameterized time domain adjustment curve

A technology for adjusting curves and artificial waves, which is applied in the field of multi-damping artificial wave fitting based on the optimal principle to construct multi-parameterized time-domain adjustment curves, which can solve the problems of uncontrollable influence, reduction of computational efficiency and fitting accuracy, etc.

Active Publication Date: 2020-06-09
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, this iterative technique requires cyclic iterative adjustment at all frequency control points and damping ratios, and cannot control the influence of the superposition time history on the remaining responses except the peak response, so the calculation efficiency and fitting accuracy vary with the number of frequency control points Significantly lower with increasing damping ratio

Method used

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  • Multi-damping artificial wave fitting method for constructing multi-parameterized time domain adjustment curve
  • Multi-damping artificial wave fitting method for constructing multi-parameterized time domain adjustment curve
  • Multi-damping artificial wave fitting method for constructing multi-parameterized time domain adjustment curve

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Embodiment Construction

[0073] Specific embodiments of the present invention will be described in detail below in conjunction with specific schemes and accompanying drawings.

[0074] The method in this embodiment takes the normalized Elcentro wave as the initial wave and fits the RG1.60 design spectrum with five damping ratios of 0.5%, 2%, 5%, 7% and 10% as an example for illustration. Include the following steps:

[0075] (1) Construct the standard input time histories at all frequency control points and damping ratios according to equations (1) to (4), forming a standard input time history library, which is convenient for calling standard input time histories in subsequent adjustments. The standard input time history at 5% damping ratio 15Hz and its Fourier amplitude spectrum and response spectrum are as follows: Figure 2a , 2b and 2c as shown;

[0076] (2) The normalized Elcentro wave and its calculated response spectrum are as follows image 3 and 4 As shown, calculate the maximum relative...

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Abstract

The invention belongs to the technical field of anti-seismic safety analysis and evaluation of nuclear power equipment engineering, and relates to a multi-damping artificial wave fitting method for constructing a multi-parameterized time domain adjustment curve. According to the narrow-band time history construction method, the narrow-band time history has narrow-band characteristics in a time domain and a frequency domain, the ringing effect caused by Fourier transform is avoided, and the new narrow-band time history is called as a standard input time history; the artificial wave is roughly adjusted in a mode of separately superposing each damping ratio of each frequency control point with the standard input time history; then, a frequency control point with the maximum absolute deviationis searched; the optimal weight combination of the standard input time history of each damping ratio at the frequency is searched by using a simulated annealing algorithm so as to simultaneously superpose the standard input time history of multiple damping ratios, thereby controlling the influence of the superposed time history on the response spectrum in the time domain adjustment process and further improving the fitting precision of all damping ratio response spectrums at the frequency; a frequency control point with the maximum relative deviation is searched, and circularly adjusting is performed in the same way; and finally, the artificial wave is adjusted in the post-processing module, so that the artificial wave meets the standard requirement, and the fitting precision is further improved. According to the method, the multi-damping artificial wave fitting problem formed by the frequency and the damping ratio is subjected to dimensionality reduction processing, the problem is simplified into the one-dimensional problem only needing to pay attention to the frequency, and the artificial seismic wave of the high-precision fitting multi-damping nuclear power design spectrum canbe generated.

Description

technical field [0001] The invention belongs to the technical field of seismic safety analysis and evaluation of nuclear power equipment engineering, and relates to a multi-damping artificial wave fitting method for constructing a multi-parameterized time-domain adjustment curve, specifically a multi-parameterized time-domain adjustment based on an optimal principle Multi-damped artificial wave fitting method for curves. Background technique [0002] Ensuring the anti-seismic safety of nuclear power plants is the premise and guarantee to ensure the smooth implementation and safe operation of nuclear power plants. Analyzing the seismic response of engineering structures by means of numerical calculation is a necessary way to effectively evaluate their safety, and it is particularly important to select representative ground motions for dynamic analysis. A key factor in the representativeness of ground motions is their consistency with the design response spectrum. The form o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/06
Inventor 李建波程峰林皋
Owner DALIAN UNIV OF TECH
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