Journal of Vibration and Acoustics: Recent submissions
Now showing items 901-920 of 3913
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On the Thermomechanical Response of HTPB Based Composite Beams Under Near Resonant Excitation
(The American Society of Mechanical Engineers (ASME), 2015)Currently, there is a pressing need to detect and identify explosive materials in both military and civilian settings. While these energetic materials vary widely in both form and composition, many traditional explosives ... -
Synthetic Jet Actuator Cavity Acoustics: Helmholtz Versus Quarter Wave Resonance
(The American Society of Mechanical Engineers (ASME), 2015)The impact of cavity geometry on the source of acoustic resonance (Helmholtz or quarterwave) for synthetic jet type cavities is presented. The cavity resonance was measured through externally excited microphone measurements. ... -
Effects of Forward/Backward Whirl Mechanism on Nonlinear Normal Modes of a Rotor/Stator Rubbing System
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, the effects of forward and backward whirl mechanism on the existence and the stability of multiple nonlinear normal modes (NNMs) in a four degreeoffreedom (DOF) rotor/stator rubbing system with crosscoupling ... -
Analytical Prediction of Transmission Loss in Distorted Circular Chamber Mufflers With Extended Inlet/Outlet Ports by Using a Regular Perturbation Method
(The American Society of Mechanical Engineers (ASME), 2015)The sound attenuation performance in elliptic chamber mufflers with extended inlet and outlet ports is investigated in the present work. Unlike cylindrical geometries, the ellipticity of the chamber prevents development ... -
Analytical Solution of Biot's Equations Based on Potential Functions Method
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, a new analytical solution for Biot's equations is presented based on potential functions method. The primary coupled Biot's equations have been considered based on fluid and solid displacements in threedimensional ... -
A Model Updating Technique Based on the Constitutive Relation Error for In Situ Identification of Admittance Coefficient of Sound Absorbing Materials
(The American Society of Mechanical Engineers (ASME), 2015)The development of new absorbing materials and the description of their acoustical properties take an important place in the current acoustical researches. This paper focuses on the identification of the admittance coefficient ... -
A Methodology for Optimal Design of a Vehicle Suspension System With Energy Regeneration Capability
(The American Society of Mechanical Engineers (ASME), 2015)This paper proposes a systematic methodology for predicting and optimizing the performance of an energy regenerative suspension system to efficiently capture the vibratory energy induced by the road irregularities. The ... -
A Novel Method for Force Identification Based on the Discrete Cosine Transform
(The American Society of Mechanical Engineers (ASME), 2015)Force identification is a classical inverse problem, in which the measured data and the mathematical models of mechanical structures are used to determine the applied force. However, the identified force may seriously ... -
Local Contact Stiffness Detection for Nondestructive Testing Based on the Contact Resonance of a Piezoelectric Cantilever
(The American Society of Mechanical Engineers (ASME), 2015)In the field of nondestructive testing (NDT), a suitable defect identification parameter plays an important role in evaluating the reliability of structures or materials. In this work, we proposed a NDT method which detects ... -
Effect of Modes Inside or Outside the Studied Band on Accuracy of Decay Rate Method in Vibration Damping Test
(The American Society of Mechanical Engineers (ASME), 2015)The bandaveraged damping is determined by modal damping of the modes inside/outside the frequency band. In this paper, the effect of modes inside/outside a frequency band on the accuracy of the decay rate method (DRM) in ... -
Study on Piston Slap Induced Liner Cavitation
(The American Society of Mechanical Engineers (ASME), 2015)Liner cavitation induced by piston slap in a diesel engine is caused by water pressure fluctuation when the pressure of coolant falls below saturated vapor pressure. Cavitation erosion of cylinder liners is thought to be ... -
Optimal Force Inputs for Environmental Vibration Testing of Full Scale Slender Aerospace Vehicles
(The American Society of Mechanical Engineers (ASME), 2015)A hypothesis is presented in this paper for evaluating the root mean square (RMS) errors in acceleration for determining the optimal locations of the exciters during the vibration testing of slender flexible structures, ... -
Enhanced Rotating Machine Fault Diagnosis Based on Time Delayed Feedback Stochastic Resonance
(The American Society of Mechanical Engineers (ASME), 2015)The faultinduced impulses with uneven amplitudes and durations are always accompanied with amplitude modulation and (or) frequency modulation, which leads to that the acquired vibration/acoustic signals for rotating machine ... -
Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials
(The American Society of Mechanical Engineers (ASME), 2015)Component miniaturization and reduced power requirements in sensors have enabled growth in the field of lowpower ambient vibration energy harvesting. This work aims to increase bandwidth and power output beyond current ... -
Stability Analysis of On Board Friction Modifier Systems at the Wheel–Rail Interface
(The American Society of Mechanical Engineers (ASME), 2015)Friction control at the wheel–rail interface, using onboard solid stick friction modifier systems can lead to enhanced track life, reduced wear, and increased fuel economy in railroads. Frictional contact between the ... -
Wave Based Method for Free and Forced Vibration Analysis of Cylindrical Shells With Discontinuity in Thickness
(The American Society of Mechanical Engineers (ASME), 2015)Wave based method (WBM) is presented to analyze the free and forced vibration of cylindrical shells with discontinuity in thickness. The hull is first divided into multiple segments according to the locations of thickness ... -
Analysis of Vibration of a Tank Caused by an Explosion
(The American Society of Mechanical Engineers (ASME), 2015)The vibration of a large tank caused by an explosion that occurs at a place apart from the tank is analyzed. Because the tank is doublewalled and the liquid is contained in the inner shell, the vibration of the outer shell ... -
Design of a Miniaturized Pneumatic Vibration Isolator With High Static Low Dynamic Stiffness
(The American Society of Mechanical Engineers (ASME), 2015)In the ultraprecision vibration isolation systems, it is desirable for the isolator to have a larger load bearing capacity and a broader isolation bandwidth simultaneously. Generally, pneumatic spring can bear large load ... -
Determination of the Free Field Acoustic Radiation Characteristics of the Vibrating Plate Structures With Arbitrary Boundary Conditions
(The American Society of Mechanical Engineers (ASME), 2015)The paper presents the developed algorithm which implements the indirect variational boundary element method (IVBEM) for computation of the freefield acoustic radiation characteristics of vibrating rectangleshaped plate ... -
Impact Force Based Model for Bearing Local Fault Identification
(The American Society of Mechanical Engineers (ASME), 2015)Local faults, like spalls in rolling element bearings, give rise to periodic impulsive excitation to the supporting structure. So, an impact based force evaluation, the resulting response analysis of the structure, and ...