Synonyms were used for: Noise vibration,
Search without synonyms: title: Noise and Vibration; Noise and vibration, 2010

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    Coupling of Finite Element and Energy Finite Element Solutions for Calculating the Vibration of Co-linear Beams in the Mid-Frequency Range

    Vlahopoulos, Nickolas / Zhao, Xi | SAE Technical Papers | 1999
    is comprised by some members that contain several wavelengths and some members that contain a small number of wavelengths. The former are ...

    Integration of Finite Element and Boundary Element Methods for Simulating the Noise Radiated From a Flexible Panel Subjected to Boundary Layer Excitation

    Allen, Michael J. / Vlahopoulos, Nickolas | SAE Technical Papers | 1999
    In this paper an algorithm is developed for combining finite element analysis and boundary element techniques in order to compute the noise ...
    Keywords: Noise

    Accounting for Manufacturing Variability in Interior Noise Computations

    Allen, Michael J. / Vlahopoulos, Nickolas | SAE Technical Papers | 2001
    incorporates the concept of fast probability integration with finite element (FEA) and boundary element analysis (BEA) for producing the probabilistic ...
    Keywords: Simulation and modeling , Interior noise

    Computation of Wind Noise Radiated from a Flexible and Elastically Supported Panel

    Saltsman, Benjamin J. / Allen, Michael J. / Vlahopoulos, Nickolas | SAE Technical Papers | 2001
    A numerical methodology based on the finite element and boundary element methods is presented for computing the noise radiated from an ...

    Development and Validation of a Computational Process for Pass-By Noise Simulation

    Moenssen, David J. / Zhang, Kevin / Vlahopoulos, Nickolas et al. | SAE Technical Papers | 2001
    comparing the actual and the computationally reconstructed acoustic field for an engine intake manifold. The overall pass-by noise simulation ...
    Keywords: Simulation and modeling , Noise

    Mid-Frequency Vibration Analysis of Systems Containing One Type of Energy Based on a Hybrid Finite Element Formulation

    Vlahopoulos, Nickolas / Zhao, Xi | SAE Technical Papers | 2001
    . In the mid-frequency range a system is comprised of both long and short members. Long members contain several wavelengths and they are ...

    Validation of the EFEA Method through Correlation with Conventional FEA and SEA Results

    Wang, Aimin / Vlahopoulos, Nickolas / Zhang, Weiguo | SAE Technical Papers | 2001
    The Energy Finite Element Analysis(EFEA) is a recent development for high frequency vibro-acoustic analysis, and constitutes an evolution ...

    Structural Vibration of an Engine Block and a Rotating Crankshaft Coupled Through Elastohydrodynamic Bearings

    Hu, Kexin / Vaidyanathan, Kumar / Vlahopoulos, Nickolas et al. | SAE Technical Papers | 2003
    bearings. The component mode synthesis is employed for modeling the crankshaft and block dynamic behavior. A specialized algorithm for coupling the ...
    Keywords: Combustion and combustion processes , Vibration , Simulation and modeling

    A Hybrid Finite Element Formulation for Analyzing Systems of Beams and Plates in the Mid-Frequency Range

    Vlahopoulos, Nickolas / Hong, Sang Bum | SAE Technical Papers | 2003
    A hybrid Finite Element Analysis (hybrid FEA) formulation has been developed in the past for computing the mid-frequency vibration of ...

    Oil Film Dynamic Characteristics for Journal Bearing Elastohydrodynamic Analysis Based on a Finite Difference Formulation

    Vaidyanathan, Kumar / Vlahopoulos, Nickolas / Ebrat, Omidreza et al. | SAE Technical Papers | 2003
    A fast and accurate journal bearing elastohydrodynamic analysis is presented based on a finite difference formulation. The governing ...
    Keywords: Tools and equipment

    Probabilistic Analysis for the Performance Characteristics of Engine Bearings due to Variability in Bearing Properties

    Wang, Jin / Vaidyanathan, Kumar / Vlahopoulos, Nickolas et al. | SAE Technical Papers | 2003
    based on the number and the range of the variables that are considered to vary in the design space. The development of the metamodels is ...
    Keywords: Combustion and combustion processes

    Application of a Hybrid Finite Element Formulation for Analyzing the Structure-Borne Noise in a Body-In-White

    Vlahopoulos, Nickolas / Hong, Sang Bum | SAE Technical Papers | 2005
    analyses. The correlation demonstrates that the hybrid FEA can be employed for structure-borne vibration and noise analysis during the design stage ...
    Keywords: Simulation and modeling

    Model Update Under Uncertainty and Error Estimation in Shock Applications

    Sun, Jiulong / Hu, Kevin / Vlahopoulos, Nickolas | SAE Technical Papers | 2005
    uncertainty and error estimation for shock applications is presented. Fast running models are developed for the model update based on principal ...
    Keywords: Marine vehicles and equipment

    A Computational Approach for Evaluating the Acoustic Detection of a Military Vehicle

    Gorsich, David / Vlahopoulos, Nickolas / Mantey, Robert et al. | SAE Technical Papers | 2005
    atmosphere and evaluates detectable distance. ADRPM predicts the distance of detection for a noise source based on the acoustic signature of the ...
    Keywords: Noise

    Energy Finite Element Analysis of the NASA Aluminum Testbed Cylinder

    Wang, Aimin / Klos, Jacob / Vlahopoulos, Nickolas et al. | SAE Technical Papers | 2005
    An energy finite element analysis (EFEA) formulation is developed for predicting high frequency vibration response of cylindrical shells ...

    Combining an Energy Boundary Element with an Energy Finite Element Analysis for Airborne Noise Simulations

    Zhang, Geng / He, Jim / Vlahopoulos, Nickolas | SAE Technical Papers | 2007
    Element Analysis (EFEA) has been developed for computing the structural vibration of complex structures at high frequencies and validations have ...
    Keywords: Vibration , Noise

    Validation of an EFEA Formulation for Computing the Vibrational Response of Complex Structures

    Zhang, Geng / Vlahopoulos, Nickolas | SAE Technical Papers | 2007
    an advanced double hull design and a conventional hull design of a surface ship are analyzed. Results for the structural vibration induced on ...
    Keywords: Simulation and modeling

    Validation of a Hybrid Finite Element Formulation for Mid-Frequency Analysis of Vehicle Structures

    Caprioli, Davide / Viktorovitch, Michel / Vlahopoulos, Nickolas et al. | SAE Technical Papers | 2007
    the vibration of the stiff members and the amount of power dissipated at the damping elements has been identified, an EFEA analysis is ...
    Keywords: Simulation and modeling

    A Substructuring Formulation for the Energy Finite Element Analysis

    Zhang, Geng / Vlahopoulos, Nickolas | SAE Technical Papers | 2007
    number of elements which include both structural and interior fluid elements, while certain parts of the structure are considered to be exposed ...
    Keywords: Simulation and modeling

    Combining Energy Boundary Element with Energy Finite Element Simulations for Vehicle Airborne Noise Predictions

    Wang, Aimin / Vlahopoulos, Nickolas | SAE Technical Papers | 2008
    Element Analysis (EFEA) has been developed for computing the structural vibration of complex structures at high frequencies and validations have ...