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

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.Results 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: First, 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 seismicThe 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 response    

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Identification of dynamic stiffness matrix of bearing joint region

Feng HU, Bo WU, Youmin HU, Tielin SHI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 289-299 doi: 10.1007/s11465-009-0064-3

Abstract: The dynamic stiffness matrix of the bearing joint region can be identified by measuring the matrix of frequencyresponse function (FRFs) of the substructure (axle) and whole structure (assembly of the axle, bearing

Keywords： frequency response function (FRFs)     dynamic stiffness     finite element     synthetic substructure method     joint    

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Effects of elastic support on the dynamic behaviors of the wind turbine drive train

Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 348-356 doi: 10.1007/s11465-017-0420-7

Abstract: Frequency response functions were used to examine how different elastic support parameters influenceA large support stiffness of the torque arms decreased the dynamic response of the planet carrier andthe main bearing, whereas a large support stiffness of the main bearing decreased the dynamic response

Keywords： wind turbine drive train     elastic support     dynamic behavior     frequency response function    

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Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block

GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 416-421 doi: 10.1007/s11708-008-0097-z

Abstract: The frequency response of the block was calculated using the finite element method (FEM).

Keywords： bearing     dynamical     frequency response     dynamical simulation     hybrid dynamical    

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Evaluation of transmissibility for a class of nonlinear passive vibration isolators

Z. K. PENG, Z. Q. LANG, G. MENG

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 401-409 doi: 10.1007/s11465-012-0349-9

Abstract:

In this study, the concept of Output Frequency Response Functions (OFRFs) is applied to representthe transmissibility of nonlinear isolators in frequency domain.isolators can significantly suppress both the force and displacement transmissibility over the resonant frequency

Keywords： nonlinear vibration     volterra series     Output Frequency Response Functions (OFRFs)     nonlinear damping     vibration    

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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 Time

Keywords： planetary gearbox     non-stationary conditions     variable load     dynamic response     time frequency analysis    

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Review of recent advances of polymer based dielectrics for high-energy storage in electronic power devices from the perspective of target applications

Wenjie Sun, Jiale Mao, Shuang Wang, Lei Zhang, Yonghong Cheng

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 18-34 doi: 10.1007/s11705-020-1939-4

Abstract: emphasized, including high energy storage density, low dissipation, high working temperature and fast-response

Keywords： dielectric capacitors     polymer-based dielectrics     energy density     dielectric loss     working temperature     frequencyresponse    

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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 frequencyIn particular, the governing relationship of the continuum frequency for Kirchhoff–Love cylindrical shellsis 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 solutions

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

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Calculation of collision frequency function for aerosol particles in free molecule regime in presence

Xiaowei LUO, Yannick BENICHOU, Suyuan YU

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 506-510 doi: 10.1007/s11708-013-0275-5

Abstract: The collision frequency function for aerosol particles has already been calculated for the free moleculeforce, electric force and molecular forces, created by particles themselves, recalculated the collision frequencyAttractive forces increase naturally the collision frequency, while repulsive forces decrease it.

Keywords： aerosol particles     collision frequency function     coagulation    

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Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 134-140 doi: 10.1007/s11708-009-0034-9

Abstract: The intent of this study is to investigate the fuel variability on the flickering frequency of diffusionIt was found that the low frequency oscillation of flow and flame structures depended only weakly onWhen a mixture of methane/propane at a ratio of 1:1 was used the peak flickering frequency was aroundMechanisms thought to produce changes in the dynamic response and frequency harmonics were discussed.

Keywords： fuel variability     flickering frequency     diffusion flames     dynamics of combustion    

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Title Author Date Type Operation

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

Zhu Dangdang,Feng Yaoqi,Xiang Shuhong

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

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

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Journal Article

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

Ye GAO, Wei SUN

Journal Article

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

Journal Article

Identification of dynamic stiffness matrix of bearing joint region

Feng HU, Bo WU, Youmin HU, Tielin SHI

Journal Article

Effects of elastic support on the dynamic behaviors of the wind turbine drive train

Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN

Journal Article

Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block

GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun

Journal Article

Evaluation of transmissibility for a class of nonlinear passive vibration isolators

Z. K. PENG, Z. Q. LANG, G. MENG

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

Review of recent advances of polymer based dielectrics for high-energy storage in electronic power devices from the perspective of target applications

Wenjie Sun, Jiale Mao, Shuang Wang, Lei Zhang, Yonghong Cheng

Journal Article

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

Journal Article

Calculation of collision frequency function for aerosol particles in free molecule regime in presence

Xiaowei LUO, Yannick BENICHOU, Suyuan YU

Journal Article

Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Journal Article