Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-11-01

Journal: ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS

Included Journals: EI、SCIE、Scopus

Volume: 84

Page Number: 19-24

ISSN: 0955-7997

Key Words: FAQP; Acoustic radiation; High frequency; Irregular frequency; Normal-derivative integral equation; Burton and Miller formulation

Abstract: Frequency averaged normal-derivative Helmholtz integral equation is proposed to get robust predictions of the frequency averaged quadratic pressure (FAQP) radiated from the structures at medium and high frequencies. The non-uniqueness problem of frequency averaged Helmholtz integral equation and frequency averaged normal-derivative Helmholtz integral equation is overcome by the coupling method combining these two integral equations. The numerical examples are given to demonstrate the versatility of the frequency averaged normal-derivative Helmholtz integral equation and the coupling method. (C) 2017 Elsevier Ltd. All rights reserved.