125 振動エネルギー伝搬解析によるヴァイオリン構造の考察(騒音・振動の解析・改善(2))

概要

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Experimental Statistical Energy Analysis (ESEA) is applied to analyze the vibration energy flow on violin body. The violin body is subdivided into 6 SEA subsystems. The analysis can identify the power flow through the subsystems and the power input into each subsystem during the impact excitation at the bridge which connects the strings and the body. The analysis results for two kinds of violin are compared. It is shown that three pieces of knowledge concerning on the better violin are obtained, 1) damping of the body structure is small, 2) the frequency distribution of power input into the body is in inverse proportion to square root of frequency and 3) the energy on the top plate is propagating through the sound post into the back plate. The fundamental discussions on the knowledge 2) and 3) are carried out.
一般社団法人日本機械学会の論文
2011-06-29