2022 Fiscal Year Final Research Report
Development of wave-based numerical methods able to predict room acoustics at full audible ranges
| Project/Area Number |
20K04806
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 23020:Architectural environment and building equipment-related
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| Research Institution | Kobe University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 室内音響シミュレーション / 波動音響解析 / 音響解析 / Partition of Unity FEM / 拡張作用境界 / インパルス応答 / 吸音材料 / 音環境予測 |
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| Outline of Final Research Achievements |
This study aims to develop a novel wave-based acoustic simulation method for predicting sonic environments in architectural spaces such as concert halls and classrooms more efficiently and accurately. We developed a room-acoustics simulation technology that uses the Partition-of-Unity FEM (PUFEM) with plane-wave-enrichment. We performed studies regarding establishing proper parameter setup for robust simulations, implementing boundary conditions for accurate modeling of acoustic materials, and computational efficiency. We successfully showed that the proposed PUFEM solver has a high potential as a next-generation acoustics simulation method in architectural spaces, with higher accuracy and efficiency than standard FEM technology.
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| Free Research Field |
建築環境音響学
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| Academic Significance and Societal Importance of the Research Achievements |
建築の音環境設計に活用される数値シミュレーション技術は、幾何音響解析と波動音響解析に大別される。信頼性の高い音環境設計のためには後者の波動音響解析が必要であるが、波動音響解析を用いて広大な建築空間を可聴周波数全域に渡り高精度に予測することは計算コストの観点から未解決の問題であり、より効率的な新しい波動解析技術の開発が望まれている。本研究は、精度・効率・既存技術との親和性などの観点から、次世代の音環境予測技術となりうるPUFEMによる波動音響解析手法に着目し、建築の音環境をより高い信頼性のもと効率的に予測できる可能性を明らかにしたものである。
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