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Dynamic behavior analysis of Taizhou Bridge

Ruan Jing,Ma Rujin

Strategic Study of CAE 2010, Volume 12, Issue 8,   Pages 83-87

Abstract:

The dynamic behaviors have critical influences on the design of structure dynamics, health monitoring and maintenances. The three- pylon two-span suspension bridge does have different static and dynamic behaviors comparing with traditional one-span suspension bridge. This paper analyzes the dynamic behavior of Taizhou Bridge under construction stage and operation stage based on ANSYS. Some meaningful results have been obtained and can provide references for engineers in the further.

Keywords： three-pylon two-span suspension bridge     dynamic property     self-vibration frequency     vibration shape    

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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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Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 465-469 doi: 10.1007/s11465-010-0115-9

Abstract: A single wheelset drive model and 2-DOFs torsional vibration model were established to investigate theself-excited torsional vibration of a locomotive driving system.The simulation results indicate that the self-excited torsional vibration occurs when the steady slipThe principle of energy conservation was used to analyze the mechanism of the self-excited vibration.The factors affecting on the amplitude of the self-excited vibration are studied.

Keywords： locomotive     driving system     self-excited torsional vibration     mechanism     influence factor    

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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 systemsThese works lay a solid foundation for the active vibration control of mechanical structures.

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

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Prediction of characteristic blast-induced vibration frequency during underground excavation by using

Tae Un PAK; Guk Rae JO; Un Chol HAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 1029-1039 doi: 10.1007/s11709-022-0861-x

Abstract: changes of blasting vibration parameters such as vibration velocity and energy in different frequencyFrom analysis of results, it can be found that peak velocity and energy of blasting vibration in frequencyfrequency.Most frequency bands were affected by blasting source distance, and the frequency band of 0–62.5 Hz reflectedBy presenting a simplified method to predict main vibration frequency, this research may provide significant

Keywords： wavelet analysis     blast-induced vibration     frequency characteristics     underground excavation    

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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: are essential for flutter analysis of long-span bridges, and they are generally identified from the vibrationMaking use of the forced vibration testing data of three sectional models, namely, a thin-plate modelIt was shown that all the flutter derivatives of the thin-plate model identified with the frequency-domainMore precisely, the frequency-domain method usually results in smooth curves of the flutter derivativesidentification results of flutter derivatives relatively sensitive to the signal phase lag between vibration

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

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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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Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0763-1

Abstract: As the core components of grinding machine spindles, grinding wheels greatly affect the vibration levelThe unbalance vibration self-recovery regulation (UVSRR) system is proposed to suppress the vibrationResults show that the self-locking torque satisfies the actual demand, and the driving torque is increased

Keywords： UVSRR system     radial electromagnetic type     vibration suppression     performance simulation     engineering    

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Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Frontiers of Structural and Civil Engineering   Pages 981-993 doi: 10.1007/s11709-023-0979-5

Abstract: modeled the moving-vehicle-induced forcing excitation on a single-span prismatic bridge as a multiple frequency-multiplicationThe forced modal responses consist of multiple frequency-multiplication steady-state harmonics and onedamped mono-frequency complementary harmonic.single-span simple beams, the moving vehicle carriage heaving oscillation modulates the beam modal frequency

Keywords： forced vibration     linear Euler beam     moving load     harmonic structure     frequency modulation     end restraints    

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Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremelynoisy ambient vibration tests in Shiraz-Iran

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 446-472 doi: 10.1007/s11709-019-0605-8

Abstract: The main purpose of the present study is to enhance high-level noisy data by a wavelet-based iterative filtering algorithm for identification of natural frequencies during ambient wind vibrational tests on a petrochemical process tower. Most of denoising methods fail to filter such noise properly. Both the signal-to-noise ratio and the peak signal-to-noise ratio are small. Multiresolution-based one-step and variational-based filtering methods fail to denoise properly with thresholds obtained by theoretical or empirical method. Due to the fact that it is impossible to completely denoise such high-level noisy data, the enhancing approach is used to improve the data quality, which is the main novelty from the application point of view here. For this iterative method, a simple computational approach is proposed to estimate the dynamic threshold values. Hence, different thresholds can be obtained for different recorded signals in one ambient test. This is in contrast to commonly used approaches recommending one global threshold estimated mainly by an empirical method. After the enhancements, modal frequencies are directly detected by the cross wavelet transform (XWT), the spectral power density and autocorrelation of wavelet coefficients. Estimated frequencies are then compared with those of an undamaged-model, simulated by the finite element method.

Keywords： ambient vibration test     high level noise     iterative signal enhancement     wavelet     cross and autocorrelation    

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Control of wind-induced vibration of long-span bridges and tall buildings

GU Ming

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 51-62 doi: 10.1007/s11709-007-0005-3

Abstract: With the rapid increase in scales of structures, research on controlling wind-induced vibration of large-scaleFor wind-induced vibration of large-scale structures, vibration frequencies and damping modes vary withA new semiactive lever-type tuned mass damper (TMD) with an adjustable frequency is proposed to controlThe results demonstrate that the proposed strategies can reduce vibration effectively, and can adaptto wind-induced vibration control of large-scale structures in the uncertain dynamic circumstance.

Keywords： torsional buffeting     large-scale     semiactive     adjustable frequency     building aeroelastic    

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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.characteristic parameters might affect the force and displacement transmissibility is built for the vibrationoutputs of the nonlinear isolators, and the introduction of a nonlinear anti-symmetric damping into vibrationThese conclusions are of significant importance in the analysis and design of the nonlinear vibration

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

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Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

Song Jian

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 63-72

Abstract:

In this paper, the influence of thrust and air drag on rocket lateral vibration is studied, and thefrequency reduction under the thrust and drag is analyzed.The formulas for evaluation of the changes of frequencies and vibration modes are obtained.

Keywords： aircraft     rocket     lateral vibration     thrust and drag     vibration mode and frequency    

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Self-Powered Active Vibration Control: Concept, Modeling, and Testing Article

Jin-Yang Li, Songye Zhu

Engineering 2022, Volume 11, Issue 4,   Pages 126-137 doi: 10.1016/j.eng.2021.03.022

Abstract:

Despite their superior control performance, active vibration control techniques cannot be widely usedAs an innovative solution to this problem, an unprecedented self-powered active vibration control systemThe self-powering ability of the system was confirmed based on a detailed power flow analysis of vibrationA self-powered actively controlled actuator was designed and applied to a scaled active vibration isolationThe setup and control strategy of the proposed system can be readily extended to diversified active vibration

Keywords： Self-powered active vibration control     Energy harvesting     Skyhook control     Power equilibrium     Smart control    

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Probabilistic safety assessment of self-centering steel braced frame

Navid RAHGOZAR, Nima RAHGOZAR, Abdolreza S. MOGHADAM

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 163-182 doi: 10.1007/s11709-017-0384-z

Abstract: Controlled rocking self-centering system as a modern low-damage system is capable of minimizing the drawbacksThis paper quantifies main limit states and investigates the seismic performance of self-centering bracedMargin of safety, confidence level, and mean annual frequency of the self-centering archetypes for theirResults of the investigation indicate that the design of low- and mid-rise self-centering archetypes

Keywords： self-centering steel braced frame     mean annual frequency     safety assessment     confidence level     margin of    

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Title Author Date Type Operation

Dynamic behavior analysis of Taizhou Bridge

Ruan Jing,Ma Rujin

Journal Article

Conformal analysis of fundamental frequency of vibration of elastic clamped plates

QI Hongyuan, ZHU Hengjun

Journal Article

Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Journal Article

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

Jinxin LIU, Xuefeng CHEN, Zhengjia HE

Journal Article

Prediction of characteristic blast-induced vibration frequency during underground excavation by using

Tae Un PAK; Guk Rae JO; Un Chol HAN

Journal Article

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

Zhengqing CHEN

Journal Article

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

Journal Article

Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding

Journal Article

Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Journal Article

Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremelynoisy ambient vibration tests in Shiraz-Iran

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Journal Article

Control of wind-induced vibration of long-span bridges and tall buildings

GU Ming

Journal Article

Evaluation of transmissibility for a class of nonlinear passive vibration isolators

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

Journal Article

Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

Song Jian

Journal Article

Self-Powered Active Vibration Control: Concept, Modeling, and Testing

Jin-Yang Li, Songye Zhu

Journal Article

Probabilistic safety assessment of self-centering steel braced frame

Navid RAHGOZAR, Nima RAHGOZAR, Abdolreza S. MOGHADAM

Journal Article