SBIR Phase II: A Multilevel Method for Rapid Evaluation of Sound Fields

这个小企业创新研究（SBIR）二期项目旨在将目前声学分析的高频极限提高两个数量级，并促进超大声结构相互作用问题的数值模拟。该方法将快速多极子法（FMM）与边界元法（BEM）的直接和间接公式相结合，将推动数值声学的发展。FMM-BEM技术将计算声学的分析时间缩短了两个数量级。在整个可听频率范围内对汽车和飞机内部进行精确的声学分析将首次成为现实。该技术还可以详细计算潜艇船体的声学特性，并对机场坡道上遭受喷气发动机噪音的工人的职业安全问题进行定量评估。

This Small Business Innovation Research (SBIR) Phase II project aims to extend the current high frequency limit of acoustic analysis by two orders of magnitude and facilitate numerical simulation of extremely large sound structure interaction problems. The proposed method will advance the state of the art in numerical acoustics by integrating the Fast Multipole Method (FMM) with the direct and indirect formulations of the Boundary Element Method (BEM). The FMM-BEM technology reduces analysis time in computational acoustics by two orders of magnitude. Accurate acoustic analysis of automotive and aircraft interiors in the entire audible frequency range will become practical for the first time. The technology will also allow detailed computation of the acoustic characteristic of submarine hulls, and quantitative assessment of the occupational safety concerns of workers subjected to jet engine noise at airport ramps.