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Abstract: A detailed experimental investigation to measure the hydrodynamic loading on a fully submerged bottom moored circular cylinder (SMC) due to the action of oblique regular and random waves has been carried out in a wave basin. The model has been connected to the floor of the basin by means of taut open mooring lines. The pressure distribution around the cylinder was measured, from which the horizontal and vertical force components were derived. In addition, the tensions in the mooring lines were also measured. These tests were performed for three relative depths of submergence of the cylinder. This paper presents the effect of the wave direction and the depth of submergence on the forces on the SMC and on the mooring forces. [Copyright &y& Elsevier]

The hydrodynamic pressures induced by regular waves around the circumference of a pipeline normal to the wave direction and near a rigid bed of slope 1:10 have been investigated in a wave flume. The pressures were integrated to obtain the force time history, from which the peak horizontal and vertical forces are evaluated. The maximum and root mean square horizontal and transverse force coefficients are correlated with the Keulegan–Carpenter (KC) number. The effect of the distance between the sloping bed and the pipeline on the force coefficients is discussed. The force coefficients are found to decrease with an increase in KC number and with the decrease in the relative clearance of the pipeline from the boundary. In addition, the reflection characteristics of the sloping bed in the presence of the pipeline as a function of surf similarity parameter and their comparison with the results from existing literature are also reported. The details of the model setup, experimental procedure, results and discussion are presented in this paper. [Copyright &y& Elsevier]

The hydrodynamic pressures due to random waves around a pipeline near a rigid bed of slope 1:10 have been measured. The tests were performed for pipelines normal and parallel to the wave direction. These tests were carried out for three gap ratios of the pipeline from the sloping bed. The pressures were resolved in the horizontal and vertical directions and integrated for the force time history in the respective directions. The effects of relative clearance of pipe from the bed and wave steepness on the probability distribution of the forces on the pipeline are reported. The average statistical force ratios as a function of scattering parameter and the variation of the force coefficients as a function of Keulegan–Carpenter number are also presented. The details of the model setup, experimental procedure, analysis of results and discussion are reported in this paper. [ABSTRACT FROM AUTHOR]