Advanced Statistical Energy Analysis (ASEA) for Structural Acoustic Analysis of Periodic Ribbed Plates in High-Speed Railway Bridges.

In recent years, the issue of structure-borne noise caused by steel bridges has become increasingly significant. The periodic ribbed plate not only serves as a fundamental component of steel bridges but also represents the primary source of noise. This paper integrates the advanced statistical energy analysis (ASEA) method with acoustic radiation theory to propose a method for predicting the noise generated by periodic ribbed plates. Simultaneously, sample experiments were conducted to validate the accuracy and reliability of the proposed method. A comparative analysis between the ASEA method and the traditional statistical energy analysis (SEA) method reveals a substantial underestimation by the SEA method for the acoustic response of plates located far from the excitation. At high frequencies, the prediction error of the SEA method reaches up to 30 dB. At the end of the paper, the effects of base plate thickness, rib height, and rib thickness on the transmission coefficient and difference of sound power level (DSWL) of periodic ribbed plates were investigated. It was found that increasing the base plate thickness and rib height can respectively weaken and enhance the energy attenuation capability of periodic ribbed plates, while the effect of rib plate thickness on the energy attenuation capability is weak. [ABSTRACT FROM AUTHOR]