Development of indirect EFBEM for radiating noise analysis including underwater problems

International Journal of Naval Architecture and Ocean Engineering

Jee-Hun Song¹  Suk-Yoon Hong²  Hyun-Wung Kwon² 

[1]Department of Naval Architecture & Ocean Engineering, Chonnam National University, Jeonnam, Korea

[2]Research Institute of Marine Systems Engineering (RIMSE), Seoul National University, Seoul, Korea

关键词: Energy flow boundary element method (EFBEM);    Radiating noise;    Free surface effect;    Directivity factor;   

DOI  :  10.2478/IJNAOE-2013-0141

来源: DOAJ

【 摘 要 】

For the analysis of radiating noise problems in medium-to-high frequency ranges, the Energy Flow Boundary Element Method (EFBEM) was developed. EFBEM is the analysis technique that applies the Boundary Element Method (BEM) to Energy Flow Analysis (EFA). The fundamental solutions representing spherical wave property for radiating noise problems in open field and considering the free surface effect in underwater are developed. Also the directivity factor is developed to express wave's directivity patterns in medium-to-high frequency ranges. Indirect EFBEM by using fundamental solutions and fictitious source was applied to open field and underwater noise problems successfully. Through numerical applications, the acoustic energy density distributions due to vibration of a simple plate model and a sphere model were compared with those of commercial code, and the comparison showed good agreement in the level and pattern of the energy density distributions.

【 授权许可】

Unknown