Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise
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Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise
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Author :
language : en
Publisher:
Release Date : 1992
Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Analytical and experimental validation of methods to predict structural vibration and radiated noise is presented in this paper. A rectangular box excited by a mechanical shaker was used as a vibrating structure. Combined finite element method (FEM) and boundary element method (BEM) models of the apparatus were used to predict the noise radiated from the box. The FEM was used to predict the vibration, and the surface vibration was used as input to the BEM to predict the sound intensity and sound power. Vibration predicted by the FEM model was validated by experimental modal analysis. Noise predicted by the BEM was validated by sound intensity measurements. Three types of results are presented for the total radiated sound power: (1) sound power predicted by the BEM model using vibration data measured on the surface of the box, (2) sound power predicted by the FEM/BEM model, and (3) sound power measured by a sound intensity scan. The sound power predicted from the BEM model using measured vibration data yields an excellent prediction of radiated noise. The sound power predicted by the combined FEM/BEM model also gives a good prediction of radiated noise except for a shift of the natural frequencies that are due to limitations in the FEM model. Acoustic intensity, Noise, Vibration, Boundary clement, Finite element.
Experimental Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-11-07
Experimental Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-07 with categories.
This research report is presented in three parts. In the first part, acoustical analyses were performed on modes of vibration of the housing of a transmission of a gear test rig developed by NASA. The modes of vibration of the transmission housing were measured using experimental modal analysis. The boundary element method (BEM) was used to calculate the sound pressure and sound intensity on the surface of the housing and the radiation efficiency of each mode. The radiation efficiency of each of the transmission housing modes was then compared to theoretical results for a finite baffled plate. In the second part, analytical and experimental validation of methods to predict structural vibration and radiated noise are presented. A rectangular box excited by a mechanical shaker was used as a vibrating structure. Combined finite element method (FEM) and boundary element method (BEM) models of the apparatus were used to predict the noise level radiated from the box. The FEM was used to predict the vibration, while the BEM was used to predict the sound intensity and total radiated sound power using surface vibration as the input data. Vibration predicted by the FEM model was validated by experimental modal analysis; noise predicted by the BEM was validated by measurements of sound intensity. Three types of results are presented for the total radiated sound power: sound power predicted by the BEM model using vibration data measured on the surface of the box; sound power predicted by the FEM/BEM model; and sound power measured by an acoustic intensity scan. In the third part, the structure used in part two was modified. A rib was attached to the top plate of the structure. The FEM and BEM were then used to predict structural vibration and radiated noise respectively. The predicted vibration and radiated noise were then validated through experimentation. Seybert, A. F. and Wu, T. W. and Wu, X. F. Unspecified Center AIRCRAFT NOISE; BOUNDARY ELEMENT METHOD; DYNAMIC STRUCTURAL ...
Experimental Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise
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Author : Xuefeng Wu
language : en
Publisher:
Release Date : 1991
Experimental Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise written by Xuefeng Wu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Structural dynamics categories.
Experimental Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise
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Author : A. F. Seybert
language : en
Publisher:
Release Date : 1994
Experimental Validation Of Finite Element And Boundary Element Methods For Predicting Structural Vibration And Radiated Noise written by A. F. Seybert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Boundary element methods categories.
Noise And Vibration Control On Ships
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Author : Raymond Fischer
language : en
Publisher: Springer Nature
Release Date :
Noise And Vibration Control On Ships written by Raymond Fischer and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Paper
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Author :
language : en
Publisher:
Release Date : 1992
Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Mechanical engineering categories.
The Boundary Element Method In Acoustics
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Author : Stephen Kirkup
language : en
Publisher: Stephen Kirkup
Release Date : 1998
The Boundary Element Method In Acoustics written by Stephen Kirkup and has been published by Stephen Kirkup this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Acoustical engineering categories.
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1993
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Government publications categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date :
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Government publications categories.