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

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