Structural noises induced by urban viaduct box beam basically comes from the vibration responses with low frequency noises

which may affect the surrounding buildings’ security

the common using of highprecision instruments and the living of human beings etc.In order to study the principles of structural noise of railway box beams

the infinite longitudinal stiffened concrete cylindrical shell in air was actively investigated.Aimed at the fluid structure interaction

the characteristics of sound radiation of coupling system were investigated by the wavenumber domain approach and transfer matrix method.And the effects of various parameters on the properties of concrete cylindrical shell

including the position of observation point

the size of the external excitation force

structural damping and the amount of longitudinal ribs

were numerically simulated based on the proposed analytical model.It is found that the increase of longitudinal ribs can effectively reduce the vibration and structural noises of concrete cylindrical shell.The observations would be provided as beneficial guidelines for the noise mitigation of pipeline structures and railway box beams.