STATISTICAL ENERGY ANALYSIS OF STRUCTURE-BORNE SOUND FOR BENDING・LONGITUDINAL・TRANSVERSE WAVE AT THE MODEL OF PLATE JUNCTION : Statistical energy analysis of structure-borne sound at the connected structures Part 2

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  • プレート状模型交差部における曲げ波・縦波・横波による固体音の統計的エネルギー解析に関する研究 : 結合構造における固体音の統計的エネルギー解析に関する研究 その2
  • プレートジョウ モケイ コウサブ ニ オケル マゲ ナミ タテナミ ヨコナミ ニ ヨル コタイオン ノ トウケイテキ エネルギー カイセキ ニ カンスル ケンキュウ ケツゴウ コウゾウ ニ オケル コタイオン ノ トウケイテキ エネルギー カイセキ ニ カンスル ケンキュウ ソノ 2

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Abstract

Statistical Energy Analysis (SEA) method is utilized to investigate the vibration energy of structure-borne sound. This method analyses the complex connected structures with many vibration modes received stationary random vibration in broad-band excitation, if the natural frequencies within the frequency bandwidth are statistically distributed. The present paper describes equations of power balances and coupling loss factors between coupled systems from theoretical perspective. The paper also discusses the diffuse vibration field of plates and the transmission efficiency of junctions in detail. Moreover, the author calculated the "average" transmission efficiency using reciprocity relations by three incident bending, longitudinal, transverse waves. A series of experimental investigation was conducted by using the "average" transmission efficiency.

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