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Time-domain and frequency-domain approaches to identification of bridge flutter derivatives

Zhengqing CHEN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 173-179 doi: 10.1007/s11709-009-0034-1

Abstract: Flutter derivatives are essential for flutter analysis of long-span bridges, and they are generally identifiedmethod and a frequency-domain method.It was shown that all the flutter derivatives of the thin-plate model identified with the frequency-domainmethod and time-domain method, respectively, agree very well.More precisely, the frequency-domain method usually results in smooth curves of the flutter derivatives

Keywords： long-span bridges     wind-induced vibration     flutter derivatives     forced vibration test     time-domain method     frequency-domain method    

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MIMO-GPC Stability Analysis Based on Frequency Domain

Sun Qinglin,Chen Zengqiang,Yuan Zhuzhi

Strategic Study of CAE 2004, Volume 6, Issue 10,   Pages 39-44

Abstract:

A MIMO-GPC stability theorem based on frequency domain is presented in the paper.

Keywords： MIMO-GPC     frequency domain analysis     stability criterion    

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Frequency domain a9ctive vibration control of a flexible plate based on neural networks

Jinxin LIU, Xuefeng CHEN, Zhengjia HE

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 109-117 doi: 10.1007/s11465-013-0252-z

Abstract:

A neural-network (NN)-based active control system was proposed to reduce the low frequency noise radiationMulti-frequency control in frequency domain was achieved by simulation through the NN-based control systems

Keywords： active vibration control (AVC)     neural network (NN)     low frequency noise     frequency domain control     multi-frequency    

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Frequency-domain-based Robustness Analysis for PID Generalized Predictive Control

Wang Fanzhen,Chen Zengqiang,Yao Xiangfeng,Yuan Zhuzhi

Strategic Study of CAE 2006, Volume 8, Issue 10,   Pages 66-70

Abstract: Further more, the influence of PID - GPC parameter tuning on its robustness is analyzed in frequencydomain.

Keywords： predictive control     robustness     frequency domain     small-gain criterion     PID control    

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An efficient stochastic dynamic analysis of soil media using radial basis function artificial neural

P. ZAKIAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 470-479 doi: 10.1007/s11709-017-0440-8

Abstract: In this study, the stochastic dynamic analysis of soil mass is performed by finite element method inthe frequency domain.Two methods are used for stochastic analysis of soil media which are spectral decomposition and Monteis proposed and added to Monte Carlo method for sake of reducing computational effort of the random analysis

Keywords： stochastic analysis     random seismic excitation     finite element method     artificial neural network     frequencydomain analysis     Monte Carlo simulation    

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H∞ control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 264-275 doi: 10.1007/s11709-013-0214-x

Abstract: floor isolation from the ground motions are filtered by the structure, leaving the majority of the frequencycontent of the input motion lower than the predominant frequency of the structure.effectively reduced acceleration for short period motions with frequencies close to the predominant frequencywell as effectively reduced displacement for long period motions with frequencies close to the natural frequencypassive control because of its capacity to adjust control strategies according to the different motion frequency

Keywords： semi-active     floor isolation     H∞ control     MR damper     shaping filter     shaking table test    

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Anti-collision monitoring based on detecting casing head vibration induced by drill movements

He Baosheng,Liu Gang,Wang Shuangping,Wen Min

Strategic Study of CAE 2011, Volume 13, Issue 5,   Pages 74-78

Abstract: The acceleration sensors were fixed on the casing head to fell the vibration, the time domain analysisand frequency domain analysis were used in signal processing to recognize the approach motive of the

Keywords： encryption adjustment well     anti-collision     risk well     vibration signal     time domain analysis     frequencydomain analysis    

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A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0006-x

Abstract: A frequency error estimation is presented for the isogeometric free vibration analysis of Kirchhoff–LoveBy analyzing the discrete isogeometric equations with the aid of harmonic wave assumption, the frequencyis naturally embedded into the frequency error measures without the need of explicit frequency expressionsNumerical results not only thoroughly verify the theoretical convergence rates of frequency solutionsthe isogeometric free vibration analysis of Kirchhoff–Love cylindrical shells.

Keywords： isogeometric analysis     Kirchhoff–Love cylindrical shell     free vibration     frequency error     convergence    

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Optimum lateral extent of soil domain for dynamic SSI analysis of RC framed buildings on pile foundations

Nishant SHARMA, Kaustubh DASGUPTA, Arindam DEY

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 62-81 doi: 10.1007/s11709-019-0570-2

Abstract: This article describes a novel approach for deciding optimal horizontal extent of soil domain to be usedLateral extent of soil domain, along with the soil properties, were varied exhaustively for a particularCompared to the past studies, error estimation analysis shows that the relationships prescribed in theThese relationships can be readily applied for deciding upon the lateral extent of the soil domain forconducting precise SSI analysis with reduced computational time.

Keywords： soil structure interaction     optimum lateral extent of soil domain length     multi-storyed framed building     pile foundation     OpenSEES     L-K boundaries     dynamic analysis    

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Analysis of frequency characteristics of compliant mechanisms

WANG Wenjing, YU Yueqing

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 267-271 doi: 10.1007/s11465-007-0046-2

Abstract: Much work is needed for a further study on the dynamic analysis of compliant mechanisms to improve theirdifferentials of a stiffness matrix to design parameters, a method for calculating the sensitivity of natural frequencyThe numerical simulation results indicate that the design parameters have an impact on the frequencycharacteristics of the compliant mechanisms and the proposed method is more accurate and convenient for analyzing frequency

Keywords： compliant mechanisms     convenient     sensitivity     work     analysis    

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Improved numerical method for time domain dynamic structure-foundation interaction analysis based on

DU Jianguo, LIN Gao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 336-342 doi: 10.1007/s11709-008-0054-2

Abstract: the reduced set of base function in scaled boundary finite element method (SBFEM), an improved time domainnumerical approach for the dynamic structure-foundation interaction analysis was proposed.The acceleration frequency response functions were calculated and the influences affected by differentbe concluded that the proposed approach is suitable for large-scale structure-foundation interaction analysis

Keywords： structure-foundation interface     computational efficiency     different     suitable     numerical approach    

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Fatigue Life Prediction of Long-Life Pavement Using Frequency-Domain Analysis

Wei Baoli,Guo Chengchao and Cui Can

Strategic Study of CAE 2017, Volume 19, Issue 6,   Pages 80-85 doi: 10.15302/J-SSCAE-2017.06.012

Abstract: A detailed frequency domain analysis of fatigue life was carried out.

Keywords： long-life pavement     fatigue life prediction     random vibration     power spectral density    

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Frequency-domain Analysis of ECG Signals

Tu Chengyuan,Zeng Yanjun,Li Shuxin

Strategic Study of CAE 2002, Volume 4, Issue 12,   Pages 66-70

Abstract:

A new simple approach to effectively detect QRS — T complexes in ECG curve is described, so as to easily get the P-wave (when AF does not happen) or the f-wave (when AF happens). By means of signal processing techniques such as the power spectrum function, the auto-correlation function and cross-correlation function, two kinds of ECG signals when AF does or does not happen were successively analyzed, showing the evident differences between them.

Keywords： ECG curve     P-wave     f-wave     AF (atrial fibrillation)     histogram     power spectrum     autocorrelation     cross-correlation    

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Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 148-154 doi: 10.1007/s11708-012-0174-1

Abstract: Based on the analysis of frequency regulation, mathematic models for nuclear units in the grid are establishedThe relationship between different styles of frequency regulation and the allowable capacity of the nuclear

Keywords： nuclear units capacity     overspeed     primary frequency control (PFC)     second frequency control (SFC)    

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Meta-analysis of the diagnostic efficiency of frequency-doubling technology for primary glaucoma

LIU Ting, HE Xiangge

Frontiers of Medicine 2007, Volume 1, Issue 1,   Pages 109-114 doi: 10.1007/s11684-007-0021-7

Abstract: The overall diagnostic capabilities and utility of frequency-doubling technology (FDT) in patients withStatistical analysis was performed with Meta Test version 0.6 software to test the heterogeneity of theFinally, sensitivity analysis was performed.Sensitivity analysis demonstrated no disproportionate influences of individual studies.of good quality and FDT can be a highly efficient diagnostic test for primary glaucoma based on Meta-analysis

Keywords： inclusion     sensitivity analysis     correction     specificity     appropriate    

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Title Author Date Type Operation

Time-domain and frequency-domain approaches to identification of bridge flutter derivatives

Zhengqing CHEN

Journal Article

MIMO-GPC Stability Analysis Based on Frequency Domain

Sun Qinglin,Chen Zengqiang,Yuan Zhuzhi

Journal Article

Frequency domain a9ctive vibration control of a flexible plate based on neural networks

Jinxin LIU, Xuefeng CHEN, Zhengjia HE

Journal Article

Frequency-domain-based Robustness Analysis for PID Generalized Predictive Control

Wang Fanzhen,Chen Zengqiang,Yao Xiangfeng,Yuan Zhuzhi

Journal Article

An efficient stochastic dynamic analysis of soil media using radial basis function artificial neural

P. ZAKIAN

Journal Article

H∞ control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Journal Article

Anti-collision monitoring based on detecting casing head vibration induced by drill movements

He Baosheng,Liu Gang,Wang Shuangping,Wen Min

Journal Article

A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Journal Article

Optimum lateral extent of soil domain for dynamic SSI analysis of RC framed buildings on pile foundations

Nishant SHARMA, Kaustubh DASGUPTA, Arindam DEY

Journal Article

Analysis of frequency characteristics of compliant mechanisms

WANG Wenjing, YU Yueqing

Journal Article

Improved numerical method for time domain dynamic structure-foundation interaction analysis based on

DU Jianguo, LIN Gao

Journal Article

Fatigue Life Prediction of Long-Life Pavement Using Frequency-Domain Analysis

Wei Baoli,Guo Chengchao and Cui Can

Journal Article

Frequency-domain Analysis of ECG Signals

Tu Chengyuan,Zeng Yanjun,Li Shuxin

Journal Article

Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Journal Article

Meta-analysis of the diagnostic efficiency of frequency-doubling technology for primary glaucoma

LIU Ting, HE Xiangge

Journal Article