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Well-being analysis of GSU transformer insulation incorporating the impact on power generation using

Alagarsamy KRISHNAVEL, Dusmata Kumar MOHANTA, M. Jaya Bharata REDDY

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 288-299 doi: 10.1007/s11708-013-0265-7

Abstract: approach is employed in this paper along with actual field data and case studies for the well-being analysis

Keywords： generator step-up (GSU) transformer     well-being analysis     dissolved gases in oil analysis (DGA)     tan delta(TD)     sweep frequency response analysis (SFRA)     fuzzy inference system (FIS)    

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Influence factors on natural frequencies of composite materials

Bo WANG, Feng ZHAO, Zixu ZHAO, Kunpeng XU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 571-584 doi: 10.1007/s11465-020-0592-4

Abstract: polynomial methods were used to derive the dynamic equations of composite materials and obtain the natural frequencyThe correctness of the analytical model was verified by modal hammering and frequency sweep tests.

Keywords： composite material     hammering and frequency sweep test     structural parameter     natural frequency    

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Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of

Ye GAO, Wei SUN

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 358-368 doi: 10.1007/s11465-019-0539-9

Abstract: identifying such parameters was described based on the measured natural frequencies and amplitudes of the frequencyresponse functions (FRFs) of a pipeline system supported by two hoops.premise of selecting initial values reasonably, an inverse identification algorithm based on sensitivity analysisAfter introducing the identified values into the analysis model, the reliability of the identificationResults indicated that the support stiffness and damping of the hoop exhibited frequency-dependent characteristics

Keywords： inverse identification     pipeline hoop     frequency response function     mechanical parameters     preload    

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Soil seismic analysis for 2D oblique incident waves using exact free-field responses by frequency-based

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1530-1551 doi: 10.1007/s11709-022-0900-7

Abstract: The seismic analysis of a viscoelastic half-space under two-dimensional (2D) oblique incident waves isFirst, the frequency-domain exact solutions for the displacements and stresses of the free field areBased on the asymmetric finite/infinite element model, the frequency-domain motion equations for seismicanalysis are presented with the key parameters selected.The results obtained in frequency and time domain are verified against those of Wolf’s, Luco and de Barros

Keywords： oblique incident waves     critical angle     half-space     finite/infinite element approach     seismic responseanalysis    

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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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Research of Refinement Methods of Dynamic Model Based on Frequency Response Functions

Zhu Dangdang,Feng Yaoqi,Xiang Shuhong

Strategic Study of CAE 2005, Volume 7, Issue 8,   Pages 89-94

Abstract: the development of dynamic model improvement methods, and researched the refinement methods based on frequencyand response functions, which had been developed in recent years.In order to make the full use of the frequency and response functions obtained in the vibration test,the paper introduced three dynamic model improvement methods with frequency and response functions such

Keywords： spacecraft     dynamics     frequency and response functions     model refinement    

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Analysis of planetary gear transmission in non-stationary operations

Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 88-94 doi: 10.1007/s11465-013-0361-8

Abstract: The computation of the dynamic response shows an intimate relation between the vibration amplitude levelA combined amplitude and frequency modulation is observed which is well characterized using Short TimeFourier transform more suited than the spectral analysis.

Keywords： planetary gearbox     non-stationary conditions     variable load     dynamic response     time frequency 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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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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Conformal analysis of fundamental frequency of vibration of elastic clamped plates

QI Hongyuan, ZHU Hengjun

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 429-432 doi: 10.1007/s11465-007-0073-z

Abstract: To calculate the fundamental frequency of vibration of special-shaped and elastic clamped plates, theGalerkin method is used to obtain the solution of fundamental frequency in the vibrating differentialFinally, taking ellipse elastic clamped plates as an example, the effects on fundamental frequency coefficient

Keywords： direction     theory     vibration     odd     complicated boundary    

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Research of mid and high frequency response of complex mechanical structures using energy finite element

Zhu Danhui,Xie Miaoxia,Kong Xiangjie,Zhang Wenbo,Chen Hualing

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 106-112

Abstract: reviewed, which indicate that the development direction of this method tend to predict the dynamic responsenbsp;the achievements of our research group are presented, which focus on predict the dynamical responseThere are three main aspects are referred: the first section is that the EFEM to predict the responsecylindrical shell and truncated conical shell, and this method help us to obtain the local detail responseof complex structures in mid and high frequency range; the second part is that we extend the EFEM

Keywords： mid and high frequency response     energy finite element method     prediction of vibro-acoustical response    

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Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 227-236 doi: 10.1007/s11708-012-0198-6

Abstract: The frequency of the power system varies based on the load pattern of the consumers.With continuous increase in the load, the frequency of the system keeps decreasing and may reach itsFurther increase in the load will result in more frequency drop leading to the need of load shedding,in a hybrid thermal-hydro system for finding the required amount of load to be shed for setting the frequencyThe load shedding steps were obtained based on the rate of change of frequency with the increase in the

Keywords： critical load     frequency response     load shedding     multi-area system     rate of change of frequency     superconducting    

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Modal analysis of acoustic leak signal in pipelines using time-frequency analysis

JIAO Jing-pin, FEI Ren-yuan, HE Cun-fu, WU Bin

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2,   Pages 146-150 doi: 10.1007/s11465-006-0013-3

Abstract: In this paper, the acoustic leak signal is analyzed in the time-frequency domain.Based on the relation of time-frequency distribution of the acoustic leak signal and the dispersion curves

Keywords： dispersion     selection     guided     research     time-frequency    

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Load shedding scheme for the two-area system with linear quadratic regulator

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 90-102 doi: 10.1007/s11708-012-0224-8

Abstract: to many emergency conditions which may lead to emergency state of operation with decay in the system frequencyThe dramatic change in the frequency can result in cascaded failure of the system.two-area thermal-thermal system for finding the required amount of load to be shed for setting the frequencyThe LS steps have been obtained based on the rate of change of frequency with the increase in load in

Keywords： critical load     frequency response     load shedding (LS)     multi-area system     rate of change of frequency     linear    

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Title Author Date Type Operation

Well-being analysis of GSU transformer insulation incorporating the impact on power generation using

Alagarsamy KRISHNAVEL, Dusmata Kumar MOHANTA, M. Jaya Bharata REDDY

Journal Article

Influence factors on natural frequencies of composite materials

Bo WANG, Feng ZHAO, Zixu ZHAO, Kunpeng XU

Journal Article

Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of

Ye GAO, Wei SUN

Journal Article

Soil seismic analysis for 2D oblique incident waves using exact free-field responses by frequency-based

Journal Article

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

Journal Article

Research of Refinement Methods of Dynamic Model Based on Frequency Response Functions

Zhu Dangdang,Feng Yaoqi,Xiang Shuhong

Journal Article

Analysis of planetary gear transmission in non-stationary operations

Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR

Journal Article

Analysis of frequency characteristics of compliant mechanisms

WANG Wenjing, YU Yueqing

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

Conformal analysis of fundamental frequency of vibration of elastic clamped plates

QI Hongyuan, ZHU Hengjun

Journal Article

Research of mid and high frequency response of complex mechanical structures using energy finite element

Zhu Danhui,Xie Miaoxia,Kong Xiangjie,Zhang Wenbo,Chen Hualing

Journal Article

Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Journal Article

Modal analysis of acoustic leak signal in pipelines using time-frequency analysis

JIAO Jing-pin, FEI Ren-yuan, HE Cun-fu, WU Bin

Journal Article

Load shedding scheme for the two-area system with linear quadratic regulator

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Journal Article