Intro; Preface; Contents; Squeal Noise; 1 A State-of-the-Art Review of Curve Squeal Noise: Phenomena, Mechanisms, Modelling and Mitigation; Abstract; 1 Introduction; 2 Frictional Excitation; 2.1 Curving Behaviour; 2.2 Simple Models of Oscillators with Friction; 2.3 Negative Friction Slope Model; 2.4 Mode Coupling Mechanisms; 2.5 Brake Squeal; 3 Modelling; 3.1 Modelling Approaches; 3.2 Wheel Dynamic Behaviour; 3.3 Models Based on Falling Friction; 3.4 Inclusion of Vertical Dynamics; 3.5 Mode Coupling; 3.6 Other Questions; 3.6.1 Should the Rail Be Included?

3.6.2 Is the Effect of Wheel Rotation Important?3.6.3 What Is the Effect of Flange Contact?; 3.6.4 Contact Model; 3.6.5 Consideration of the Vehicle Curving in the Model; 4 Measurements; 4.1 Laboratory Measurements for Friction Coefficients and Squeal Noise; 4.1.1 Longitudinal Creep; 4.1.2 Lateral Creep; 4.2 Field Measurements of Curve Squeal; 4.2.1 Suburban Trains; 4.2.2 Freight Trains; 4.2.3 Trams; 4.2.4 Check Rail Contact; 4.2.5 Summary; 5 Mitigation; 5.1 Lubrication and Friction Modifiers; 5.2 Wheel Damping Treatments; 5.3 Rail Damping and Track Dynamics; 5.4 Improved Curving Behaviour

5.5 Rail Profiles, Surface Treatments and Changes to Gauge6 Concluding Remarks; References; 2 Wheel Squeal: Insights from Wayside Condition Monitoring; Abstract; 1 Introduction; 2 Methodology; 3 Angle of Attack and Wheel Squeal; 4 Effect of Speed on Wheel Squeal; 5 The Influence of Rail Friction on Wheel Squeal; 6 The Influence of Rail Grinding on Wheel Squeal; 7 Discussion; 7.1 Bogie Design, Angle of Attack, and Wheel Squeal; 7.2 The Influence of Speed on Wheel Squeal; 7.3 The Influence of Rail Conditions on Wheel Squeal; 7.4 Factors Influencing AoA; 7.5 Application to Other Railway Systems

8 ConclusionsReferences; 3 Analysis of Railway Wheel-Squeal Due to Unsteady Longitudinal Creepage Using the Complex Eigenvalue Method; Abstract; 1 Introduction; 2 Literature Review; 2.1 Mode-Coupling Instability; 2.2 Complex Eigenvalue Analysis (CEA); 3 FE Model; 3.1 Model Detail; 3.2 Normal/Friction Contact Coupling; 3.3 Model Results; 3.3.1 Mode Shapes; 3.3.2 Merging of Doublet Modes; Model Results Without Material and Rail Pad Damping; Model Results with Material and Rail Pad Damping; 4 Model Calibration and Comparison with Experimental Results; 4.1 Experimental Results

4.2 Squeal Frequencies4.3 Top-of-Rail Friction Modification; 4.4 Model Calibration; 4.5 Comparison of Model and Experimental Results; 5 Conclusion; References; 4 Prediction of Wheel Squeal Amplitude; Abstract; 1 Introduction; 2 Methodologies; 2.1 Experimental Methods; 2.2 Theoretical Modelling; 2.3 Analysis of Wheel Squeal to Predict the Steady State Amplitude; 3 Results; 4 Conclusions; References; 5 Investigation of Railway Curve Squeal Using a Combination of Frequency- and Time-Domain Models; Abstract; 1 Introduction; 2 Curve Squeal Models; 2.1 Submodels; 2.1.1 Wheel Model