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《環境振動新進展:第6屆國際環境振動學術研討會》內容分為8部分：1.Keynote Lectures;2.Wave Propagation in Soils;3.Prediction and Simulation Methods of Environmental Vibration;4.Field Measurement and Evaluation of Environmental Vibrations;5.Soil-Structure Dynamic Interaction;6.Railroad Track and Vehicle Dynamics Modeling;7.Measures in Reducing Environmental Vibration;8.Assessment on Structural Safety and Serviceability。
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《環境振動新進展:第6屆國際環境振動學術研討會》由同濟大學出版社出版。
目次
Preface
Scientific Committee
Local Organizing Committee
Part Ⅰ Keynote Lectures
Numerical Simulation of High-Speed Train Induced Ground Vibration for Non-Ballasted Railway on Embankment
Ambient Vibration Testing of a Large Truss Bridge with Optimal Sensor Placement
Dynamic Performance of Ballastless High-Speed Railways From a Full-Scale Accelerated Railway Testing (ART)
Dynamic Analysis of Train-Bridge System and Its Application to Bridge Design for High-Speed Railways in China
Part Ⅱ Wave Propagation in Soils
Influenced Factor of Site Information on the Environmental Ground Vibration
Analysis of Scattering Wave Field around a Cavity with Circular Cross-Section Embedded in Saturated Soil
Optimal Time-Frequency Distribution for Analyzing Non-Stationary Signal of Ground Vibration Induced by Subway
Grasp of Vibration Transfer Characteristics from Ground to Residential House Inside by Using the Developed Exciting System for Examination of Environmental Vibration
Harmonic Wave Diminution and Energy Scatter in a Planar Domain with Randomly Inhomogeneous Material Density
Part Ⅲ Prediction and Simulation Methods of Environmental Vibration
An Efficient Numerical Model for the Simulation of Vibrations Induced by Railway Traffic in Tunnels
Surface Response Analysis Excited by an Embedded Moving Load
Study of Vibration Impact on Historic Buildings Induced by Subway Trains in Spatial Overlapping Tunnels
Study on Comparison of Ground Vibrations Induced by Metro in Curved and Straight Sections
The Influence of Train Load Position on Panel Contribution to Acoustic Radiation of Viaduct Box-Beam in High Speed Railway
Theoretical Solution for Free Vibration of Simple-Supported Girder Bridge with Continuous Deck Slab
Simulation of Vibration of the Track-Embankment on Rigid Foundation Due to Moving Load by Using 2.5D Finite Element Method
Three Dimensional Vibration Effects of Foundation Induced by High-Speed Moving Loads
Numerical Analysis of Impact Forces Between a Light Truck and High-Speed Railway Bridge Pier
Part Ⅳ Field Measurement and Evaluation of Environmental Vibrations
The Influence of Soil Properties on the Ground Vibration Due to Railway Traffic and Other Sources-the Comparability of Different Sites
Field Testing Research on the Vibration Influence on the Historic and Old Buildings Induced by Metro Shield Construction
Train-Induced Subgrade Vibration Level by Field Experiments
In-situ Measurements and Analysis of Effects on Sensitive Instruments in Near-by Buildings Due to Vibrations Induced by Road Vehicles
Test and Evaluation of Vibration Environment in Low-lying Waiting Hall of High-Speed Railway
Study on the Characteristics of Rail Corrugation of Beijing Metro Based on In-situ Dynamic Tests
Field Tests and Analysis of Vibration Isolation on Typical Railway Ground Barriers
Vibration Measurement and Analysis for Buildings in a Certain Residential District
Study on the Vibration Caused by Subway Train and Its Effect on Existing Masonry Building
Cementitiously Stabilized Materials Using Ultrasonic Testing
The Research on the Dynamic Test of the Double Track Channel Beam
Vibration Test and Analysis of a High-Tech Electronics Plant in Suzhou
Part Ⅴ Soil-Structure Dynamic Interaction
Effect of Nonlinear Soil Behavior on Dynamic Soil-Structure Interaction
Dynamic Response of Cylindrical Lining in Poroelastic Saturated Half-space Soil Induced by Internal Loading
Dynamic Response of Vehicle-Bridge System Considering Soil-Structure Interaction
Dynamic Soil Pressure and Velocity of Slab Track-Subgrade in High-Speed Railway
A Simplified Solution for the Torsional Response of PCC Pile in Saturated Soil
Part Ⅵ Railroad Track and Vehicle Dynamics Modeling
Study on the Analytical Model of Coupled Vehicle and Track with Variable Speeds
3D Reconstruction Method to Analyze and Evaluation Ballast Gravels
Ground Vibration Analysis Caused by China Railway High-Speed with Track Geometric Irregularities
Computer-Vision Based 3D Discrete Element Modeling of Railroad Ballast
Study on Rail Corrugation Due to Train/Track Dynamic Interaction Based on in Situ Tests
Vibration Characteristics of Short Floating Slab Track in Metro Line
Vibration Analysis for Vehicle-Bridge Interaction by Duhamel Integral Method
Study on Wheel/Rail Acoustic Radiation of Trough Girder Bridge for Urban Rail Transit
Numerical Analysis on Reasonable Design of Physical Model of High Speed Railway
Mechanical Analysis of Rail Pad Subjected to Dynamic Load Caused by Train
Part Ⅶ Measures in Reducing Environmental Vibration
Analysis of Vibration Reduction Effect of Steel Spring Floating Slab Track with Finite Elements
Effectiveness of Under Sleeper Pads in Insulating the Train-Induced Ground Vibrations
Numerical Simulation of the Vibration Isolation Via a New Type of Pile Structure:the Linked Pile Row
In-situ Test and Numerical Evaluation of Active Vibration Isolation by WIB Under Horizontal Excitations
Three-dimensional Analysis of Active Isolation by Closed Square Open Trenches Using Grid Method
Experimental Study on Vibration and Sound Radiation Reduction of Ring Damping Wheels
Application of the Ballastless Track Vibration Damping System to Vibration Reduction of High-Speed Railway Tunnel
2-D Analysis of Open Trench as Active Barriers due to Point Load in Saturated Soil
Study on Ground Vibration Isolation by Open Trench in Layered Soils
Innovative Research and Application of FST--Prefabricated Slab
……
Part Ⅷ Assessment on Structural Safety and Serviceability
Author Index
Scientific Committee
Local Organizing Committee
Part Ⅰ Keynote Lectures
Numerical Simulation of High-Speed Train Induced Ground Vibration for Non-Ballasted Railway on Embankment
Ambient Vibration Testing of a Large Truss Bridge with Optimal Sensor Placement
Dynamic Performance of Ballastless High-Speed Railways From a Full-Scale Accelerated Railway Testing (ART)
Dynamic Analysis of Train-Bridge System and Its Application to Bridge Design for High-Speed Railways in China
Part Ⅱ Wave Propagation in Soils
Influenced Factor of Site Information on the Environmental Ground Vibration
Analysis of Scattering Wave Field around a Cavity with Circular Cross-Section Embedded in Saturated Soil
Optimal Time-Frequency Distribution for Analyzing Non-Stationary Signal of Ground Vibration Induced by Subway
Grasp of Vibration Transfer Characteristics from Ground to Residential House Inside by Using the Developed Exciting System for Examination of Environmental Vibration
Harmonic Wave Diminution and Energy Scatter in a Planar Domain with Randomly Inhomogeneous Material Density
Part Ⅲ Prediction and Simulation Methods of Environmental Vibration
An Efficient Numerical Model for the Simulation of Vibrations Induced by Railway Traffic in Tunnels
Surface Response Analysis Excited by an Embedded Moving Load
Study of Vibration Impact on Historic Buildings Induced by Subway Trains in Spatial Overlapping Tunnels
Study on Comparison of Ground Vibrations Induced by Metro in Curved and Straight Sections
The Influence of Train Load Position on Panel Contribution to Acoustic Radiation of Viaduct Box-Beam in High Speed Railway
Theoretical Solution for Free Vibration of Simple-Supported Girder Bridge with Continuous Deck Slab
Simulation of Vibration of the Track-Embankment on Rigid Foundation Due to Moving Load by Using 2.5D Finite Element Method
Three Dimensional Vibration Effects of Foundation Induced by High-Speed Moving Loads
Numerical Analysis of Impact Forces Between a Light Truck and High-Speed Railway Bridge Pier
Part Ⅳ Field Measurement and Evaluation of Environmental Vibrations
The Influence of Soil Properties on the Ground Vibration Due to Railway Traffic and Other Sources-the Comparability of Different Sites
Field Testing Research on the Vibration Influence on the Historic and Old Buildings Induced by Metro Shield Construction
Train-Induced Subgrade Vibration Level by Field Experiments
In-situ Measurements and Analysis of Effects on Sensitive Instruments in Near-by Buildings Due to Vibrations Induced by Road Vehicles
Test and Evaluation of Vibration Environment in Low-lying Waiting Hall of High-Speed Railway
Study on the Characteristics of Rail Corrugation of Beijing Metro Based on In-situ Dynamic Tests
Field Tests and Analysis of Vibration Isolation on Typical Railway Ground Barriers
Vibration Measurement and Analysis for Buildings in a Certain Residential District
Study on the Vibration Caused by Subway Train and Its Effect on Existing Masonry Building
Cementitiously Stabilized Materials Using Ultrasonic Testing
The Research on the Dynamic Test of the Double Track Channel Beam
Vibration Test and Analysis of a High-Tech Electronics Plant in Suzhou
Part Ⅴ Soil-Structure Dynamic Interaction
Effect of Nonlinear Soil Behavior on Dynamic Soil-Structure Interaction
Dynamic Response of Cylindrical Lining in Poroelastic Saturated Half-space Soil Induced by Internal Loading
Dynamic Response of Vehicle-Bridge System Considering Soil-Structure Interaction
Dynamic Soil Pressure and Velocity of Slab Track-Subgrade in High-Speed Railway
A Simplified Solution for the Torsional Response of PCC Pile in Saturated Soil
Part Ⅵ Railroad Track and Vehicle Dynamics Modeling
Study on the Analytical Model of Coupled Vehicle and Track with Variable Speeds
3D Reconstruction Method to Analyze and Evaluation Ballast Gravels
Ground Vibration Analysis Caused by China Railway High-Speed with Track Geometric Irregularities
Computer-Vision Based 3D Discrete Element Modeling of Railroad Ballast
Study on Rail Corrugation Due to Train/Track Dynamic Interaction Based on in Situ Tests
Vibration Characteristics of Short Floating Slab Track in Metro Line
Vibration Analysis for Vehicle-Bridge Interaction by Duhamel Integral Method
Study on Wheel/Rail Acoustic Radiation of Trough Girder Bridge for Urban Rail Transit
Numerical Analysis on Reasonable Design of Physical Model of High Speed Railway
Mechanical Analysis of Rail Pad Subjected to Dynamic Load Caused by Train
Part Ⅶ Measures in Reducing Environmental Vibration
Analysis of Vibration Reduction Effect of Steel Spring Floating Slab Track with Finite Elements
Effectiveness of Under Sleeper Pads in Insulating the Train-Induced Ground Vibrations
Numerical Simulation of the Vibration Isolation Via a New Type of Pile Structure:the Linked Pile Row
In-situ Test and Numerical Evaluation of Active Vibration Isolation by WIB Under Horizontal Excitations
Three-dimensional Analysis of Active Isolation by Closed Square Open Trenches Using Grid Method
Experimental Study on Vibration and Sound Radiation Reduction of Ring Damping Wheels
Application of the Ballastless Track Vibration Damping System to Vibration Reduction of High-Speed Railway Tunnel
2-D Analysis of Open Trench as Active Barriers due to Point Load in Saturated Soil
Study on Ground Vibration Isolation by Open Trench in Layered Soils
Innovative Research and Application of FST--Prefabricated Slab
……
Part Ⅷ Assessment on Structural Safety and Serviceability
Author Index
書摘/試閱
3.1System identification and modal analysis
A pure ambient measurement period of about ten to fifteen minutes is extracted for each setup. Operational modal analysis is performed using the Matlab toolbox MACEC 3.2 developed by the Structural Mechanics Section of KU Leuven (Reynders et al.2011 ).A high pass filter is applied with a cut-off frequency of 0.1 Hz to remove low frequency drift.Next, low pass digital filtering of the input data is employed in both forward and reverse directions and the data is downsampled to 50 Hz. A model of the structure is identified from the data in the system identification process using the reference-based implementation of the covariante-driven stochastic subspace identification method (SSI-cov/ref) (Peeters et al.1999).The reference signals are taken as the pre-processed time histories from the channels that are connected to the fixed reference sensors. Half the number of block rows is 120 and the considered model order range is from 2 to 250 in steps of 2.
Thirty-seven modes have been identified within a frequency range from 2.78 Hz to 14.21 Hz.The identified modal parameters are given in Table 3.The identified modes are all characterized by a low damping ratio.Most of them have a mode shape that is almost purely real, as evidenced by high MPC and low mean phase deviation (MPD) values, thus indicating a high estimation accuracy.
Mode 3 ( 2.99 Hz) has lower quality(as seen from the lower MPC and higher MPD values) , possibly because it is not well excited.Its identified frequency is very close to that of mode 2 (2.90 Hz).Another explanation could be that mode 3 has its largest modal displacements in span 5 where no fixed reference sensor was located. Modes 14, 17, 18, 19, 21, 27, 28, 35 and 36 have an MPC value less than 0.85, indicating a lower estimation accuracy as real normal modes are expected.These modes are either transverse modes or torsional modes of high orders. Modes 17 and 28 also have MPD values that are larger than 10°.
All modes with a natural frequency between 2.78 and 3.36 Hz are transverse modes.In the frequency range from 4.36 to 7.37 Hz, seven vertical modes are identified.The other six modes in this frequency range are either transverse modes or modes with coupled transverse and vertical displacements.Mode 11 (5.16 Hz) and mode 12(5.22 Hz) are closely spaced.The quality of the higher transverse mode shapes 19 and 20 is not as good as the other four transverse modes of the same frequency range.The first two modes in the frequency range from 8.46 to 14.21 Hz also belong to transverse mode type combined with vertical modal deformation.Almost all modes from 23 onward are torsional modes of increasing frequency(from 8.90 Hz to 14.21 Hz) and modal or der, in both vertical and transverse directions.Modes 31 and 32 can also be considered as transverse/combination modes.
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