Journal of Vibration and Acoustics: Recent submissions
Now showing items 341-360 of 3913
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Statistical Method for Investigating Transient Enhancements of Dynamical Responses due to Random Disturbances: Application to Railway Vehicle Motion
(The American Society of Mechanical Engineers (ASME), 2020)The paper presents a statistical method for determining a specific variation of random excitations that leads to large transient enhancements (peaks) of a particular dynamical response in a stochastic mechanical system. ... -
Optimization of Axial Vibration Attenuation of Periodic Structure With Nonlinear Stiffness Without Addition of Mass
(The American Society of Mechanical Engineers (ASME), 2020)We explore the vibration attenuation of a periodic structure when one absorber with nonlinear cubic stiffness is included without increasing the total mass. Metastructures, and specifically periodic structures, present ... -
Transient Vibro-Thermography and Nonlinear Resonant Modes
(The American Society of Mechanical Engineers (ASME), 2020)Transient vibro-thermography for nondestructive evaluation and super-resolution imaging of material defects invariably employs nonlinear contact dynamics involving the ultrasonic actuator (horn) and the surface of the ... -
Geometrical Nonlinear Effects in the Dynamic Response of Sandwich Beams
(The American Society of Mechanical Engineers (ASME), 2020)The geometrical nonlinear dynamic response of sandwich beams is studied using a dynamic high-order nonlinear model. The model is derived using the variational principle of virtual work and uses the Extended High-Order ... -
Indenter–Foam Dampers Inspired by Cartilage: Dynamic Mechanical Analyses and Design
(The American Society of Mechanical Engineers (ASME), 2020)Articular cartilage is a thin layer of a solid matrix swollen by fluid, and it protects joints from damage via poroviscoelastic damping. Our previous experimental and simulation studies showed that cartilage-like ... -
Investigation of the Helmholtz Motion of a Violin String: A Finite Element Approach
(The American Society of Mechanical Engineers (ASME), 2020)In the context of this work, a violin string motion is examined using a finite element approach. The string is formulated via ideal string elements and is bowed at one point on the string; hence, there is a nodal contact ... -
Identification of Instantaneous Frequency and Damping From Transient Decay Data
(The American Society of Mechanical Engineers (ASME), 2020)Jointed interfaces, damage, wear, or non-idealized boundary conditions often introduce nonlinear characteristics to assembled structures. Consequently, extensive research has been carried out regarding nonlinear system ... -
Effects of Temperature on the Time-Varying Mesh Stiffness, Vibration Response, and Support Force of a Multi-Stage Planetary Gear
(The American Society of Mechanical Engineers (ASME), 2020)The thermal deformation of gears will affect the vibration of the planetary system; this research mainly studied the effect of thermal conditions on planetary systems nonlinear vibration under the thermal equilibrium state. ... -
A Study of Whole Joint Model Calibration Using Quasi-Static Modal Analysis
(The American Society of Mechanical Engineers (ASME), 2020)Small length and time scales resulting from high-fidelity frictional contact elements make long duration, low frequency simulations intractable. Alternative reduced order modeling approaches for structural dynamics models ... -
Efficient Virtual Tribomechadynamics by Means of Joint Modes for Detailed Investigation of Complex Local Stick and Slip Behavior Inside a Joint
(The American Society of Mechanical Engineers (ASME), 2020)In the last years, the numerical and experimental research effort on joint nonlinearities and tribomechadynamics has increased. Thereby, local sticking and slipping effects as well as the influence of friction caused damping ... -
Fast Simulation of a Single Degree-of-Freedom System Consisting of An Iwan Element Using the Method of Averaging
(The American Society of Mechanical Engineers (ASME), 2020)While Iwan elements have been used to effectively model the stiffness and energy dissipation in bolted joints, integrating the equations of motion of these elements is fairly expensive since implicit schemes, such as ... -
Experimental Joint Identification Using System Equivalent Model Mixing in a Bladed Disk
(The American Society of Mechanical Engineers (ASME), 2020)A joint between two components can be seen as a means to transmit dynamic information from one side to the other. To identify the joint, a reverse process called decoupling can be applied. This is not as straightforward ... -
Special Issue: Tribomechadynamics
(The American Society of Mechanical Engineers (ASME), 2020)Tribomechadynamics is a nascent field of mechanical engineering that has emerged from the integration of tribology, contact mechanics, and structural and nonlinear dynamics. The principle challenge identified within the ... -
Experimental Investigation of Local Dynamics in a Bolted Lap Joint Using Digital Image Correlation
(The American Society of Mechanical Engineers (ASME), 2020)The dynamics of structures with joints commonly show nonlinearity in their responses. This nonlinear behavior can arise from the local dynamics of the contact interfaces. The nonlinear mechanisms at an interface are ... -
Contact Stress and Linearized Modal Predictions of As-Built Preloaded Assembly
(The American Society of Mechanical Engineers (ASME), 2020)The member stiffness and pressure distribution in a bolted joint is significantly influenced by the contact area of the mechanical interface under a prescribed preload force. This research explores the influence of as-built ... -
On the Characterization of Nonlinearities in Assembled Structures
(The American Society of Mechanical Engineers (ASME), 2020)This work refines a recently formalized methodology proposed by D.J. Ewins consisting of ten steps for model validation of nonlinear structures. This work details, through a series of experimental studies, that many standard ... -
Implementation and Comparison of Contact Models Within PIRAT for Nuclear Reactivity Control Systems
(The American Society of Mechanical Engineers (ASME), 2020)The reactivity control system is a vital safety system for a nuclear reactor. One of the most challenging aspects in the design of these systems is the operation during critical situations, in particular during earthquakes ... -
The Effect of Surface Finish on the Proper Functioning of Underplatform Dampers
(The American Society of Mechanical Engineers (ASME), 2020)Underplatform dampers are used to limit the resonant vibration of turbine blades. In recent years, various strategies have been implemented to maximize their damping capability. Curved-flat dampers are preferred to ensure ... -
Parametric Study and Uncertainty Quantification of the Nonlinear Modal Properties of Frictional Dampers
(The American Society of Mechanical Engineers (ASME), 2020)A numerical methodology is described to study the influence of the contact location and contact condition of friction damper in aircraft engines. A simplified beam model is used to represent the blade for the preliminary ... -
Detachment Waves and Self-Oscillation in a Belt-Drive System Incorporating Tensile Cords
(The American Society of Mechanical Engineers (ASME), 2020)Recent experimental studies have shown that tension transition via detachment waves (rather than via sliding, as commonly accepted) occurs at the belt–pulley interface for systems using simple homogeneous or textured flat ...