Wave pressure response of large cylindrical structures in seabed-wave-structure coupling system

The response of wave pressures on structures would be more complicated and bring about new phenomena under the dynamic interaction between structure, wave and seabed. It is valuable for engineering applications to investigate the response characteristics of wave pressures in this coupling system. Wave flume experiments were designed aiming at deeply embedded large cylindrical structures to investigate comparatively dynamic wave pressures on a single and on continous cylinders with two different embedment depths in response to two wave spectra. Time histories of the water surface elevation and wave pressure were analyzed in the frequency domain. By calculating the transfer function and spectral density for wave pressures along the height and around the circumference of the cylinder, experimental results of the single cylinder were compared with the theoretical based on the linear diffraction theory, and detailed comparisons were also made between the single and continuous cylinders. Some new findings and the corresponding analysis are reported in present paper. Investigations on the response mechanism of wave pressures under dynamic interaction between structure, wave and seabed, and on continous cylinders could be used as references in particular in engineering.