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Analysis on fluid-structure-acoustic interaction of vocal fold vibration and sound generation

声带振动与发声的流固声相互作用分析

基本信息

批准号：
20K14648
负责人：
吉永司
金额：
$ 2.75万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Early-Career Scientists
财政年份：
2020
资助国家：
日本
起止时间：
2020-04-01 至 2024-03-31
项目状态：
已结题

项目摘要

本年度は主に，２つの質点をバネとダンパーで接続した単純声帯モデルに対して，流体－構造－音響連成解析を行うことにより，提案手法の妥当性を検証した．声帯ひだの振動解析に関しては質点とバネに単純化することで計算効率を上げ，これまで種々の解析が行われてきた単純形状に対する流体解析を行うことにより，計算精度を検証しつつ，音まで十分な精度で解析できていることを確認しながら解析を進めた．気流解析の精度については，M5モデルと呼ばれる単純形状モデルに対する先行研究の表面圧力分布計測結果を用いて，剥離点まで表面圧力が十分な精度で計算できていることを確認した．その後，左右の声帯ひだの弾性率を変化させて左右非対称の振動が生まれた際に，3次元的な気流が，どの程度振動特性に影響を与えるのか調べた．この時，先行研究でよく用いられる1次元のベルヌーイの定理を用いたモデルと比較した．その結果，3次元気流解析と1次元モデルの結果はほとんど同じ傾向を示し，声帯の振動様式から発生音の声質まで，1次元気流モデルでも上気道の気流の圧縮性を考慮すれば十分な精度で解析できることがわかった．また，これらの結果は，声帯の振動様式に関して，気流の３次元性よりも声帯の生体組織をどのようにモデル化するのかが重要であることを示唆しており，今後は声帯ひだの複雑な形状や非線形的な変形様態に注力して解析を進めていく．得られた研究成果は2回の国際会議で発表し，米音響学会誌の学術論文として掲載された．

This year, the main message of the year is that the sound is in contact with the sound, the fluid is made, the sound is analyzed, and the method of proposal is appropriate. Sound response, vibration analysis, vibration analysis, vibration analysis, The accuracy of the calculation is very accurate. The accuracy of the sound is very high. The accuracy of the analysis is very high. The accuracy of the analysis is very high. The accuracy of the flow analysis is very high. M5 is required to study the surface force distribution in the first place. The results of the calculation of the surface force distribution are very accurate. The accuracy of the calculation of the surface force is very high. After that, the left and right sound waves are not known as the vibration force distribution, and the three-dimensional flow is not known. The degree of vibration is different from that of vibration. In the meantime, the first step is to study how to use the theorem of one-dimensional vibration to compare the results, the results of three-dimensional flow analysis, and the results of three-dimensional flow analysis. the results show that the response is the same as that of the sound signal, and the sound is generated by the sound signal. One-dimensional data flow system is used to improve the accuracy of the test system. The accuracy of the analysis is very high. The results of the test, the sound response, the sound response, and the three-dimensional response are very important for the organization of the system. In the future, we will make a copy of the shape of the shape and analyze the results of the analysis. The results of the research have been reviewed by the International Conference of the International Conference on Science and Technology.