ABSTRACT
ABSTRACT: An experimental investigation on the wave induced pressures and forces on twin tandem submarine pipelines near a rigid sloping boundary have been carried out. Two pipes of identical dimensions were subjected to regular waves with its crest parallel to the pipeline axis. The pipes were kept at four different horizontal clear spacing (w) and at three clear vertical spacing (e) from the sloping bed. The circumferential variation of dynamic pressures on the test pipe due to interference of neighboring pipe has been reported as a function of scattering parameter (ka). The forces obtained by integration of the instantaneous pressures were expressed as maximum force coefficients and correlated with Keulegen-Carpenter number (KC) or period parameter. The effect of the vertical and horizontal gap ratio on the forces have been studied and reported. The details of the experimental model, analysis and interpretation of the results are discussed in this paper.
