Acoustics and Vibration of Mechanical Structures―AVMS 2019: Proceedings of the 15th AVMS, Timisoara, Romania, May 30–31, 2019 3030541355, 9783030541354

Table of contents :
Organizing Committee
Organized By
Organizing Committee
Members
International Scientific Committee
Preface
Contents
Contributors
Analytical Approaches to Vibration Problems
Modelling of Frictional Contacts in 3D Dynamics of a Rigid Body
1 Introduction
2 Mathematical Model
3 Numerical Simulations
4 Concluding Remarks
References
Dynamics of the Impact with Benson Friction Model
1 Introduction
2 Mathematical Model
2.1 Kinematics
2.2 Generalized Active Forces
2.3 Generalized Inertia Forces
3 Application and Results
4 Conclusions
References
Vibrations of the Mass Variable Systems
1 Introduction
2 Discontinual Mass Separation
2.1 Principle of Linear Momentum
2.2 Principle of Angular Momentum
2.3 Dynamics of Separation of a Rigid Body into Two Without Impact
3 Continual Mass Separation
4 Vibration of the Oscillator with Continual Mass Variation
4.1 Reactive Force Is Omitted
5 Conclusion
References
An Approximate Analytical Solution of Transversal Oscillations with Quintic Nonlinearities
1 Introduction
2 The Governing Equation
3 OAFM for Nonlinear Differential Equation (11)
4 Numerical Example
5 Conclusions
References
Optimal Auxiliary Functions Method for Nonlinear Vibration of Doubly Clamped Nanobeam Incorporating the Casimir Force
1 Introduction
2 Nonlinear Equation for Nanobeam
3 Galerkin Formulation
4 Numerical Example
5 Conclusions
References
Study of the Vibrations of a System Consisting in Cantilever Beams
1 Introduction
2 Mechanical System
3 Particular Solution of the System
4 Numerical Example
5 Conclusions
References
Vibrations with Collisions of a Mechanical System with Elastic Elements
1 Introduction
2 The Mechanical System
3 Numerical Example
4 Conclusions
References
Determination of the Dynamic Reactions for a Variable Compression Ratio Mechanism
1 Introduction
2 Kinematic Analysis
3 Dynamic Analysis
4 Numerical Example
5 Conclusions
References
Improving the Accuracy of Estimates of the Frequencies Based on a Pseudo-sinc Function
1 Introduction
2 Leakage Phenomena and the Frequency Estimation of a Signal
3 The Developed Pseudo-sinc Function
4 Conclusions
References
Gears Dynamic Response to Vibrations
1 Introduction
2 Mechanical Model
3 Mathematical Model
4 Dynamic Response
5 Dynamic Simulation in ADAMS of Gearing
6 Conclusion
References
Dynamical Response of a Beam in a Centrifugal Field Using the Finite Element Method
1 Introduction
2 One-Dimensional Finite Element
3 Eigenvalues and Domain of Stability
4 Conclusions
References
Environmental and Occupational Noise
Development of Methodologies and Means for Noise Protection of Urban Areas—Project Results
1 Introduction
2 Concept and Activities
3 Results
4 Analysis
5 Conclusions
References
Acoustic Treatment Solution of the Technical Room in Water Pumping Station—Case Study
1 Introduction
2 Study Case—Problem Analysis
2.1 Noise Source Data
2.2 Noise Level in the Technical Room
2.3 Noise Level at the Receiver
3 Study Case—Problem Analysis
3.1 Choice of the Problem Solving Strategy and Task Definition
3.2 Realization of the Task
4 Results of the Research
5 Conclusion
References
Solution of the Environmental Noise Problem Generated by HVAC Systems—Case Study
1 Introduction
2 Noise Evaluation
3 Simulation of the Acoustic Barrier
4 Design of the Acoustic Barrier
5 Results
6 Conclusion
References
Coefficient of Sound Absorption of Polyamide PA12 Samples Manufactured by Selective Laser Sintering
1 Introduction
2 Methods
2.1 Measurement Setup and Theoretical Background
2.2 Specimens
3 Empirical Model for Estimation of the Acoustic Properties
4 Results and Discussion
5 Conclusion
References
Online Database of Industrial Noise Sources
1 Introduction
2 Industrial Noise Sources
3 Request
4 Database Structure
5 Implementation
6 Conclusion
References
Studies on the Experimental Validation of the Theoretical Static Noise Field in the Neighbourhood of Agricultural Tractors
1 Introduction
2 Methodology
2.1 The Measurement of Noise on Agricultural Machinery with Human Staff
2.2 Creating the Mathematical Model
2.3 Results
3 Conclusions
References
An Analysis of How Physical and Social Factors Influence the Efficiency of Crew Members of a Ship Running on the Danube
1 Introduction
2 Materials and Methods
2.1 Measurement of Whole-Body Vibration (WBV)
2.2 Measurement of Hand-arm Vibration (HAV)
2.3 Measurement of Noise Level
2.4 Characteristics of the Subjects
2.5 Method for Determining a Efficiency of Crew Members of a Ship Running on the Danube
3 Results and Discussions
3.1 Measurement of Whole-Body Vibration (WBV)
3.2 Measurement of Hand-arm Vibration (HAV)
3.3 Measurement of Noise
3.4 Measurement of Crew Members Efficiency
4 Conclusions
References
Mitigating Noise Pollution Level When Loading Useful Mineral Substances in CFR Wagons in Order to Increase Acoustic Comfort in Neighbouring Areas
1 Introduction
2 Working Instruments
3 Case Study
4 Sound Reduction Solutions Using Sound Absorbing and Soundproofing Panels
5 Conclusions
References
Research on Speech Changes Due to Environmental Noise
1 Introduction
2 Materials and Methods
3 Results and Analysis
4 Conclusions
References
Biomechanics and Bioacoustics
Angular Momentum About the Total Body Center of Mass Computed at Different Speeds
1 Introduction
2 Materials and Methods
2.1 Experimental Approach
2.2 Analytical Approach
3 Results and Discussions
4 Conclusions
References
Analysis of Oscillatory Eye Movements as a Nystagmus, Manifested in the Visual System
1 Introduction
2 Experimental Setup
3 Results and Conclusions
References
Visual Aids Based on Ultrasonic Sensors to Increase Mobility of Patient with Blindness or Low Vision
1 Introduction
2 Theoretical Aspects of Patient Mobility with Low Vision
3 Experimental Setup
4 Results and Conclusions
References
Numerical Investigation of an Idealized Overlapping Coronary Stents Configuration
1 Introduction
2 Vascular Model
3 Boundary Conditions
4 Results
5 Conclusions
References
Biomechanical Evaluation of Medical Rehabilitation for a Patient with Ankle Fracture
1 Introduction
2 Materials and Methods
3 Results
4 Conclusions
References
New Medical Rehabilitation System
1 Introduction
2 First Version of the Medical Rehabilitation System
3 Second Version of the Medical Rehabilitation System
4 Excitation Systems
5 Conclusion
References
Designing and Creating a Smart Audiometer Using an Arduino Platform
1 Introduction
2 Materials and Methods
3 Results and Discussion
4 Conclusion
References
Influence of Whole Body Vibration Machines, for Sport Exercises, on the Human Balance and Stability
1 Introduction
2 Materials and Methods
3 Results and Discussion
4 Conclusion
References
Human Factor Balance Under the Influence of Variable Sound Frequency and Orientation
1 Introduction
2 Materials and Methods
3 Results and Discussions
4 Conclusions
References
The Effect of Vibration Exposure on Posterior Lower Limbs Skin Temperature During the Warm-up Process of Athletes
1 Introduction
2 Dynamic Behavior of Viscoelastic Model
3 Materials and Experiment
4 Results
5 Conclusions
References
Modeling and Simulation of Mechanical Behavior of Spinal Ligaments with Applications in Traction Therapy
1 Introduction
2 Viscoelastic Modeling of Spinal Ligaments
3 Numerical Analysis of Creep and Creep Recovery
4 Traction System and Method
5 Conclusions
References
Parameter Optimization for Biocompatible Polyamide Used in Selective Laser Sintering (SLS)
1 Introduction
2 Materials and Methods
2.1 Sample Design and Fabrication
2.2 Geometric Evaluation and Mechanical Testing
2.3 Taguchi Design
3 Results and Discussions
4 Conclusions
References
Vibration Problems in Industrial Processes
Experimental Analysis of Noise and Chatter Detection in Milling Depending on the Cutting Parameters
1 Introduction
2 Experiment
2.1 The First Set of Experiments
2.2 The Second Experiment
2.3 Third Experiment
3 Results and Discussions
3.1 The First Set of Experiments
3.2 The Second Experiment
3.3 The Third Experiment
4 Conclusions
References
Modal Analysis of a Gearbox Housing in Order to Avoid Resonance Frequencies
1 Introduction
2 Case Study
3 Experimental Modal Analysis
4 Modal Analysis Using Finite Element Method
5 Results and Discussion
6 Conclusion
References
Dependence Between the Percussion Centre and the Uniformity of the Rotor Movement
1 Introduction
2 Percussion Centre of Hammer
3 Experimental Determinations
4 Conclusions
References
Comparative Analysis of the Voigt–Kelvin and Maxwell Models in the Compaction by Vibration Process
1 Introduction
2 The Parametric Analysis of the Compaction Process for the Vibratory-Field Roller System
2.1 The Dynamic Model with Voigt–Kelvin Schematics
2.2 The Dynamic Model with the Maxwell Schematization
3 The Comparative Analysis of the Dynamic Behavior for the Linear Voigt–Kelvin and Maxwell Rheological Models
4 Conclusions
References
Parametric Analysis of Dynamic Insulation in the Action of the Seismic Movements of the Base-Insulated Buildings
1 Introduction
2 Dynamic Response
3 Transmitted Force
4 Transmissibility Displacement
5 The Linear Viscous Dissipated Energy
6 Conclusions
References
Vibration of Fixing Device of the Reaction Chamber for Gamma-Ray Beam in the Project ELIADE
1 Introduction
2 Vibration Analysis
3 Clamping Lever Analysis
4 Conclusion
References
ANN Samples Generation Using 2D Dynamic FEM for Predicting Machining Vibrations
1 Introduction
2 Milling Dynamics
3 3D to 2D Conversion of Milling Dynamics
4 Results
5 Conclusions
References
Improved Model of a Vibrating Sieve
1 Introduction
2 Model of the System
3 Numerical Analysis
4 Conclusions
References
Vibration Analysis of High-Pressure Pneumatic Compressor
1 Introduction
2 Background
3 Data Acquisition
4 Vibration Analysis
5 Conclusions
References
Structural Vibration
Vibroacoustic Diagnostics Based on the Experimental and Numerical Approach
1 Introduction
2 Technical Measurement
2.1 Geometrical and Mechanical Characteristics of the Rectangular Plate
2.2 Modal Analysis Measurement Process
2.3 Harmonic Analysis Measurement Process
3 Computational Approach
3.1 Harmonic Response in Structural Domain
3.2 Harmonic Response in Acoustic Domain
4 Evaluation of the Results
5 Conclusion
References
Gear Shift Investigation Using Virtual Prototype
1 Introduction
2 Methods
2.1 Modal Analysis
2.2 Harmonic Analysis
2.3 Multibody Simulation
3 Results
4 Conclusion
References
Numerical Dynamic Analysis of Gearbox Behaviour
1 Introduction
2 Methods
3 Results
4 Conclusion
References
Acoustic and Vibration Response Analysis of Heavy-Duty Gearbox
1 Introduction
2 Methods
2.1 Modal Analysis
2.2 Harmonic Analysis
3 Results
3.1 Modal Analysis
3.2 Harmonic Analysis
4 Conclusion
References
Application of Friction Pendulum Bearings in Multistory Buildings
1 Introduction
2 Friction Pendulum Bearing Supports
3 Experimental Study
4 Conclusions
References
Spectral Element Analysis of Non-stationary Wind Acting on Overhead Transmission Line
1 Introduction
2 Mathematical Model of Overhead Transmission Line
3 Numerical Analysis
3.1 Natural Vibrations
3.2 Wind Vibrations
4 Conclusions
References
Composed Isolation System Concept for Vibration Effects Mitigation on Bridge Structures
1 Introduction
2 Constructive Details for the Composed Isolation Model Assembly
3 Modeling Aspects for the Pendulum Rolling Isolation System
4 Numerical Analysis on Pendulum System Parameter Operation
5 Conclusion
References
Research of Acoustic Metamaterials at the University of Szeged, Faculty of Engineering
1 Introduction of the Theory
2 Introduction of Measuring System
3 Measuring the Reduction of Vibration of a 2-Degree-of-Freedom Subsystem
4 “Wallpaper-like” Metamaterial
5 Simulation Process
6 Conclusion
References
Crack Assessment Based on the Use of Severity-Adjusted Modal Curvatures of the Healthy Beam
1 Introduction
2 Materials and Methods
2.1 The Developed Method to Assess Cracks
2.2 The Simulation Scheme
3 Results and Discussion
4 Conclusion
References
Influence of Eccentricity of Drive Mechanisms and Sieve Vibrations on the Quality of Seed Separation
1 Introduction
2 Materials and Methods
2.1 Determining the Amplitude of the Signal
2.2 Determination of Seed Separation Degrees of First-Quality K1, Seeds of the Quality of the Second-Quality K2, from the Initial Seed Mass, Depending on the Eccentricity of the Drive Mechanism
3 Study of the New Sieve Drive Mechanism
3.1 Study of Displacements
3.2 Study of Velocities
3.3 Study of Accelerations
4 Results and Discussions
5 Conclusions
References
About the Forces and Moments that Influence the Behavior of a Friction Pendulum
1 Introduction
2 The Working Model of the Friction Pendulum Isolator
3 The Shape of the Friction Pendulum
4 Conclusions
References
The Influence of the Mesh Element Size on Critical Bending Speeds of a Rotor in the Finite Element Analysis
1 Introduction
2 Modal Analysis
3 Numerical Results
4 Experimental Results
5 Conclusions
References