An Improved Influence Matrix Method Alternately Matching High and Low Frequency Bands with the Target Spectrum

A high-frequency matching and influencing matrix technology, applied in complex mathematical operations, geometric CAD, design optimization/simulation, etc., can solve the problems of affecting the preset accuracy of the matrix method, difficult matching of high-frequency frequencies, and time consuming.

Active Publication Date: 2020-10-27
HOHAI UNIV
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Problems solved by technology

However, for projects with higher requirements for accuracy in the middle and high frequency bands, or target spectra that are more difficult to match in the high frequency band, it takes a lot of time for the influence matrix method to achieve the preset accuracy

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  • An Improved Influence Matrix Method Alternately Matching High and Low Frequency Bands with the Target Spectrum
  • An Improved Influence Matrix Method Alternately Matching High and Low Frequency Bands with the Target Spectrum
  • An Improved Influence Matrix Method Alternately Matching High and Low Frequency Bands with the Target Spectrum

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[0022] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings. It should be understood that the embodiments provided below are only intended to disclose the present invention in detail and completely, and fully convey the technical concept of the present invention to those skilled in the art. The present invention can also be implemented in many different forms, and does not Limited to the embodiments described herein. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. After reading the present invention, modifications to various equivalent forms of the present invention by those skilled in the art fall within the scope defined by the appended claims of the present application.

[0023] Such as figure 1 As shown, an improved influence matrix method that alternates high and low frequency bands to match the target spectrum includes the following steps:

[...

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Abstract

The invention discloses an improved influence matrix method for matching high and low frequency bands alternately with the target spectrum, selecting all the eigenfunctions in the low frequency band, and the eigenfunctions corresponding to the frequency calculation points of the target spectrum in the high frequency band one by one function as a set of basis functions to decompose seismic waves, greatly reducing the dimension of the influence matrix; considering the influence of different frequency components on each other and the difference in contribution to the target spectrum, through the amplitude coefficient of the full-band and high-band eigenfunctions Adjust alternately to make the response spectrum gradually approach the target design spectrum in the whole frequency range, which can achieve a very good matching effect in the frequency range of engineering focus. The invention overcomes the disadvantages of large influence matrix dimension, low calculation efficiency, inability to take into account different requirements of high and low frequency bands and the like in the iterative process of the existing influence matrix method of response spectrum matching. The efficiency of dynamic time-history response analysis of important engineering structures is greatly improved, and it has high precision and reliability.

Description

technical field [0001] The invention relates to a structure anti-seismic design and analysis method, in particular to an improved influence matrix method in which high and low frequency bands are alternately matched with a target spectrum. Background technique [0002] Seismic design time histories, including design acceleration time histories, design velocity time histories and design displacement time histories, are very important in seismic design and analysis. The seismic time history used for structural seismic design and analysis needs to match the target code design spectrum within the frequency range of engineering applications, that is, the relative error between the response spectrum of the seismic design time history and the target code design spectrum is within the range required by the code Inside. At the same time, the acceleration, velocity, and displacement values ​​must be equal to zero at the start and end moments, and the relationship between the integrat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F17/13
CPCG06F17/13G06F2111/04G06F30/13G06F30/20
Inventor 徐卫亚杨兰兰谢伟超孟庆祥闫龙李跃王环玲王如宾王苏生向志鹏孙梦成史宏娟
Owner HOHAI UNIV
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