Title

Design Method of Damping Treatment for Structure-Borne Noise Reduction

Description

In many kinds of mechanical structures, the quietness becomes one of the important values, and the damping treatment using viscoelastic material is applied to reduce structure-borne noise. But, vibrational characteristics of viscoelastic material depend on temperature and frequency, so the systematic design of damped structures and the prediction of damping effects was difficult. This paper presents a prediction method of vibration by damping treatment applied to viscoelastic materials. The major points of this paper are as follows:The iterative design procedure to determine the vibratory characteristics of a damped beam by viscoelastic material, whose properties are dependent on temperature and frequency, is shown
The prediction methods of reduction in vibration, based on both modal analysis and the SEA method, are shown. Additionally, the estimated results using these methods are well in agreement with the measured results .

Abstract

In many kinds of mechanical structures, the quietness becomes one of the important values, and the damping treatment using viscoelastic material is applied to reduce structure-borne noise. But, vibrational characteristics of viscoelastic material depend on temperature and frequency, so the systematic design of damped structures and the prediction of damping effects was difficult. This paper presents a prediction method of vibration by damping treatment applied to viscoelastic materials. The major points of this paper are as follows:The iterative design procedure to determine the vibratory characteristics of a damped beam by viscoelastic material, whose properties are dependent on temperature and frequency, is shown
The prediction methods of reduction in vibration, based on both modal analysis and the SEA method, are shown. Additionally, the estimated results using these methods are well in agreement with the measured results .

Creator

Honda, Iwao

Nakamura, Tadao

Irie, Yoshihiko

Yamamoto, Kazuo

Publisher

Wright-Patterson Air Force Base, OH : Wright Laboratory, Flight Dynamics Directorate, Air Force Systems Command

Date

1991

Format

1 online resource (1 page)

Type

article

Date Issued

1991-08

Extent

1

Corporate Author

Mitsubishi Heavy Ind., Ltd.

Laboratory

Wright Laboratory

Report Number

WL-TR-91-3078 Volume II, page FBC-1

DoD Project

2401

DoD Task

240104

Distribution Conflict

No

Index Abstract

Contrails only

Photo Quality

Not Needed

Distribution Classification

1

Report Availability

Full text available

Provenance

University of Colorado Colorado Springs, Kraemer Family Library

Identifier

ADA241312

Is Part Of

Proceedings of Damping '91: 13-15 February 1991 San Diego, California (EAA-1 through GBC-16)