METHODS, SYSTEMS, AND COMPUTER-READABLE MEDIA FOR GENERATING SEISMIC EVENT TIME HISTORIES
First Claim
1. A method of generating a desired acceleration time history, comprising:
- supplying a response model comprising a plurality of natural frequencies across a spectrum of interest;
generating a second acceleration time history by;
determining a displacement response by applying a first acceleration time history to the response model;
comparing the displacement response to a standard displacement response over at least a low frequency band of the spectrum of interest to determine a first set of low-frequency enhancement signals across the low frequency band; and
producing the second acceleration time history by combining the first set of low-frequency enhancement signals with the first acceleration time history;
generating a third acceleration time history by;
determining an acceleration response by applying the second acceleration time history to the response model;
comparing the acceleration response to a standard acceleration response across at least a high frequency band of the spectrum of interest to determine a first set of high-frequency enhancement signals across the high frequency band; and
producing the third acceleration time history by combining the first set of high-frequency enhancement signals with the second acceleration time history; and
outputting the third acceleration time history as the desired acceleration time history.
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Accused Products
Abstract
Methods, systems, and computer-readable media generate acceleration time histories. An initial acceleration history is applied to a response model with natural frequencies across a spectrum of interest to develop a displacement response. Low-frequency enhancement signals are determined by comparing the displacement response to a standard displacement response. The enhancement signals are combined with the initial acceleration history to develop a second acceleration history, which is applied to the response model to develop an acceleration response. High-frequency enhancement signals are determined by comparing the acceleration response to a standard acceleration response. The enhancement signals are combined with the second acceleration history to develop a desired acceleration history. Acceleration histories also may be created by adding random phase angles at various frequencies to an initial acceleration history in the frequency domain, which is then converted to the time domain and scaled to generate a low-correlation history.
20 Citations
25 Claims
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1. A method of generating a desired acceleration time history, comprising:
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supplying a response model comprising a plurality of natural frequencies across a spectrum of interest; generating a second acceleration time history by; determining a displacement response by applying a first acceleration time history to the response model; comparing the displacement response to a standard displacement response over at least a low frequency band of the spectrum of interest to determine a first set of low-frequency enhancement signals across the low frequency band; and producing the second acceleration time history by combining the first set of low-frequency enhancement signals with the first acceleration time history; generating a third acceleration time history by; determining an acceleration response by applying the second acceleration time history to the response model; comparing the acceleration response to a standard acceleration response across at least a high frequency band of the spectrum of interest to determine a first set of high-frequency enhancement signals across the high frequency band; and producing the third acceleration time history by combining the first set of high-frequency enhancement signals with the second acceleration time history; and outputting the third acceleration time history as the desired acceleration time history. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of generating a desired acceleration time history, comprising:
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supplying a response model comprising a plurality of natural frequencies across a spectrum of interest; applying a first acceleration time history to the response model to develop a displacement response; determining a set of low-frequency enhancement signals across a lower band of the spectrum of interest by comparing the displacement response to a standard displacement response; combining the set of low-frequency enhancement signals with the first acceleration time history to develop a second acceleration time history; applying the second acceleration time history to the response model to develop an acceleration response; determine a set of high-frequency enhancement signals across an upper band of the spectrum of interest by comparing the acceleration response to a standard acceleration response; and combining the set of high-frequency enhancement signals with the second acceleration time history to develop the desired acceleration time history. - View Dependent Claims (11, 12, 13, 14)
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15. A method of generating a desired acceleration time history, comprising:
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converting an initial acceleration time history to a frequency domain to create an initial acceleration frequency record; determining a running time average by averaging a plurality of contiguous points across the initial acceleration time history; determining a running frequency average by averaging a plurality of contiguous points across the initial acceleration frequency record; interpolating between the initial acceleration frequency record and the running frequency average to generate an intermediate frequency record; inserting substantially random phase angles at a plurality of frequency points in the intermediate frequency record; converting the intermediate frequency record to a time domain to a create an intermediate time history; and interpolating between the intermediate time history and the running time average to generate a low-correlation acceleration time history.
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16. A computing system, comprising:
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a memory configured for storing computing instructions; and a processor operably coupled to the computing system and configured for executing the computing instructions to; generate a second acceleration time history by; determining a displacement response by applying a first acceleration time history to a response model configured with a plurality of natural frequencies across a spectrum of interest; comparing the displacement response to a standard displacement response over at least a low frequency band of the spectrum of interest to determine a first set of low-frequency enhancement signals across the low frequency band; and producing the second acceleration time history by combining the first set of low-frequency enhancement signals with the first acceleration time history; generate a third acceleration time history by; determining an acceleration response by applying the second acceleration time history to the response model; comparing the acceleration response to a standard acceleration response across at least a high frequency band of the spectrum of interest to determine a first set of high-frequency enhancement signals across the high frequency band; and producing the third acceleration time history by combining the first set of high-frequency enhancement signals with the second acceleration time history; and output the third acceleration time history as a desired acceleration time history. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A computer-readable media including computer executable instructions, which when executed on a processor perform acts, comprising:
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developing a displacement response by applying a first acceleration time history to a response model configured with a plurality of natural frequencies across a spectrum of interest; determining a first set of low-frequency enhancement signals across a lower band of the spectrum of interest by comparing the displacement response to a standard displacement response; combining the first set of low-frequency enhancement signals with the first acceleration time history to develop a second acceleration time history; applying the second acceleration time history to the response model to develop an acceleration response; determine a first set of high-frequency enhancement signals across an upper band of the spectrum of interest by comparing the acceleration response to a standard acceleration response; combining the first set of high-frequency enhancement signals with the second acceleration time history to develop a desired acceleration time history; and outputting the desired acceleration time history. - View Dependent Claims (23, 24, 25)
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Specification