Research on structural noise of concrete cylindrical shell

With the development of social economy and the raise of people´s living quality, the structural noise of box beams induced by the urban viaduct traffic has been more and more noticed. So it´s very essential and exigent for researching on structural noise of box beams. In order to search for principles of structural noise of box beams, the analytical method for solving structural noise of concrete cylindrical shell is actively investigated in the paper. The fluid-structure coupling equation of an infinite concrete cylindrical shell is first established by taking the effects of fluid-structure coupling into consideration. The predicting model of pressure radiated of the shell is proposed following the wave-number domain approach and transfer matrix method. The effects of various parameters on the properties of infinite concrete cylindrical shell, including position of observation point, size of the external excitation force, interior air of the shell and structural damping, are numerically investigated based on the proposed analytical model. The made observations demonstrate that the radiant pressure level decreases with the increasing distance between observation point and the shell. The increase in structural damping can substantially reduce magnitudes of frequency points at spikes or wave hollows. The observations made in this study can be provided as beneficial guidelines for the noise mitigation of pipeline structures and railway box beams of urban viaduct traffic.