The frequency averaged normal-derivative integral equation to predict frequency averaged quadratic pressure radiated from structures. (November 2017)

• Record Type: Journal Article
• Authors: Gao, Honglin; Li, Sheng; Meng, Chunxia
• Is Part Of: Engineering analysis with boundary elements. Volume 84(2017)
• Page Start: 19
• Page End: 24
• Publication Date: 2017-11
• Subjects: FAQP -- Acoustic radiation -- High frequency -- Irregular frequency -- Normal-derivative integral equation -- Burton and Miller formulation; Boundary element methods -- Periodicals; Engineering mathematics -- Periodicals; Équations intégrales de frontière, Méthodes des -- Périodiques; Mathématiques de l'ingénieur -- Périodiques; Boundary element methods; Engineering mathematics; Periodicals; 620.00151
• DOI: 10.1016/j.enganabound.2017.07.016
• Languages: English
• ISSNs: 0955-7997

Abstract

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.