631 コンクリート高架橋の振動騒音解析

概要

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Railway viaduct is one of the structures, which is subjective to reduce the noise since it causes an excessive degree of noise attributable to vibrations of the structural members such as floor slab, and it is desirable to predict the structure-borne noises. However, conventional methods such as Finite Element Method (FEM) are difficult to apply to predict structure-borne noises. Therefore, we have developed a new method by extending the vibration of flexure of members to the entire structure. As characteristics of the method, the structure is divided into some subsystems to analyze readily the vibration of each system, and define the trial functions for each system. As the result of comparison of the calculation and measurement of noise adjacent to the floor slab of concrete viaduct constructed on Shinkansen line, it revealed that the proposed method is able to predict approximately the structure-borne noises.
一般社団法人日本機械学会の論文
2008-09-02