Application of Inverse Boundary Element Method to Vibration Identification of Co-generation System

Format:

Book

Conference/Event

Author/Creator:

Uehara, Hiroshi, author.

Conference Name:

Small Engine Technology Conference & Exposition (2007-10-30 : Nugata, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Tokyo, JAPAN Society of Automotive Engineers of Japan 2007

Summary:

This paper describes the application of inverse boundary element method (Inverse BEM) to vibration identification on surface of Co-generation System enclosure. This method is a kind of matrix inversion using singular value decomposition. Therefore it is significant to select proper tolerance in order to identify vibration accurately. In this study, the tolerance selection method is proposed. First step, the surface velocity of numerical model with unit input was obtained by Finite Element Method. The sound pressure around the model was obtained by BEM. Second step, random noise was mixed with obtained sound pressure. Third step, by using Inverse BEM, the surface velocity was identified from the sound pressure with noise. Next, the error between the identified velocity and the velocity obtained by FEM were evaluated and the tolerance is selected to minimize the error. Final step, surface velocity in operational condition was identified from measured sound pressure and the selected tolerance by Inverse BEM. As a result, a good agreement was observed between measured velocity and identified velocity

Notes:

Vendor supplied data

Publisher Number:

2007-32-0104

Access Restriction:

Restricted for use by site license