Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)

This paper proposes a methodology for estimating airborne noise from a mechanical system under the operational conditions by component tests of a certain active subsystem which is a part of the mechanical system and includes all of vibration sources in the mechanical system. The mechanical system co...

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Main Authors: Yoshihiro SATO, Nobuyuki IWATSUKI
Format: Article
Language:Japanese
Published: The Japan Society of Mechanical Engineers 2018-08-01
Series:Nihon Kikai Gakkai ronbunshu
Subjects:
Online Access:https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00049/_pdf/-char/en
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author Yoshihiro SATO
Nobuyuki IWATSUKI
author_facet Yoshihiro SATO
Nobuyuki IWATSUKI
author_sort Yoshihiro SATO
collection DOAJ
description This paper proposes a methodology for estimating airborne noise from a mechanical system under the operational conditions by component tests of a certain active subsystem which is a part of the mechanical system and includes all of vibration sources in the mechanical system. The mechanical system consists of the active and passive subsystems, and supporting structure of the active subsystem is different from that under the component test conditions. Hence airborne noise from the active system under these two conditions are different from each other. Therefore the in-situ blocked force approach is expected to estimate airborne noise under the operational conditions by the component tests, because blocked force is a specific characteristic of the active subsystem and independent from its supporting structure. However it is reported that the in-situ blocked force approach is suitable for estimating structure borne noise and cannot be applied to airborne noise, it has been found that the in-situ blocked force approach can be approximately applied to airborne noise in resonant frequency of the mechanical system. This paper describes theoretical derivation of the approximation error caused by applying the in-situ blocked force approach to airborne noise. Furthermore, the error is evaluated by means of a 3-DOF simple model.
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spelling doaj.art-e00c236037944c2c81a72b3821d078912022-12-22T03:38:57ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-08-018486518-0004918-0004910.1299/transjsme.18-00049transjsmeEstimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)Yoshihiro SATO0Nobuyuki IWATSUKI1Core Technology R&D Center, NSK Ltd.Department of Mechanical Engineering, Tokyo Institute of TechnologyThis paper proposes a methodology for estimating airborne noise from a mechanical system under the operational conditions by component tests of a certain active subsystem which is a part of the mechanical system and includes all of vibration sources in the mechanical system. The mechanical system consists of the active and passive subsystems, and supporting structure of the active subsystem is different from that under the component test conditions. Hence airborne noise from the active system under these two conditions are different from each other. Therefore the in-situ blocked force approach is expected to estimate airborne noise under the operational conditions by the component tests, because blocked force is a specific characteristic of the active subsystem and independent from its supporting structure. However it is reported that the in-situ blocked force approach is suitable for estimating structure borne noise and cannot be applied to airborne noise, it has been found that the in-situ blocked force approach can be approximately applied to airborne noise in resonant frequency of the mechanical system. This paper describes theoretical derivation of the approximation error caused by applying the in-situ blocked force approach to airborne noise. Furthermore, the error is evaluated by means of a 3-DOF simple model.https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00049/_pdf/-char/enblocked forcein-situ blocked force approachtpaairborne noisevibro-acoustic frf
spellingShingle Yoshihiro SATO
Nobuyuki IWATSUKI
Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)
Nihon Kikai Gakkai ronbunshu
blocked force
in-situ blocked force approach
tpa
airborne noise
vibro-acoustic frf
title Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)
title_full Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)
title_fullStr Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)
title_full_unstemmed Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)
title_short Estimation of noise radiation including airborne noise using the in-situ blocked force approach (Proposal of an approximate method and its verification using a simple model)
title_sort estimation of noise radiation including airborne noise using the in situ blocked force approach proposal of an approximate method and its verification using a simple model
topic blocked force
in-situ blocked force approach
tpa
airborne noise
vibro-acoustic frf
url https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00049/_pdf/-char/en
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