Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Robert J. Bernhard"'
Autor:
Robert J. Bernhard, S. Wang
Publikováno v:
Journal of Sound and Vibration. 319:426-444
In this paper, the prediction of averaged energy of damped structural-acoustic systems is investigated. A simplified energy finite element method, referred to as EFEM0, is developed based on the energy flow analysis (EFA) equations and implemented us
Publikováno v:
Journal of Sound and Vibration. 288:1131-1155
The adaptive-passive approach to vibration control shows potential for achieving superior performance when compared to classical passive solutions. On-line adaptation of passive elements is central to the adaptive-passive approach and a great deal of
Publikováno v:
Journal of Sound and Vibration. 280:211-234
Shape memory alloy (SMA) adaptive tuned vibration absorbers show great potential for adaptive–passive vibration control. Heating the SMA spring element in an ATVA changes the SMA elastic modulus, which results in changing the device natural frequen
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1941:161-166
This paper is intended as a brief basic primer on tire–pavement noise generation and measurement. It is particularly directed toward pavement and materials engineers who are aware that noise is an issue of concern to the public but have not been ab
Publikováno v:
Journal of Sound and Vibration. 277:647-667
An extension of the modal overlap factor is introduced that includes ensemble variations and frequency averaging of plates and acoustic spaces. Uniformly and normally distributed variations of geometric and material parameters are considered. Using t
Publikováno v:
Journal of Sound and Vibration. 249:835-848
The adaptive-passive vibration absorber shows promise for combining the stability and low complexity of passive tuned absorbers with the robust performance of active vibration control schemes. Previous adaptive tuned vibration absorbers (ATVA) had be
Publikováno v:
Journal of Sound and Vibration. 246:901-926
A model was developed and applied for predicting the vibration response of structures excited by complex vortical turbulent flows. Computational fluid dynamic (CFD) methods were utilized to model the flow over the structure. The computations allowed
Publikováno v:
Mathematical and Computer Modelling. 34(5-6):657-675
In this work, we analyze the statistical properties of an ensemble of beams subject to vibrational loading. We consider the effect of variations in length and other parameters of the beam and its response. In this context, we precisely define low- an
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1756:68-75
Two surveys were administered to tollbooth employees working at a toll collection plaza located in Indiana. The first was used to evaluate employees’ subjective response to the ambient noise levels in their occupational environment. The results con
Publikováno v:
IEEE Transactions on Control Systems Technology. 8:228-235
A significant amount of the interior noise of aircraft and automobiles is a result of turbulent boundary layer excitation of the vehicular structure. In this investigation, the feasibility of active robust feedback control of the noise due to this ty