Root mean square force coefficients for submarine pipelines

Abstract

An experimental investigation has been carried out on forces induced by regular and random waves on submarine pipelines placed near a plane boundary. The inline and transverse forces are analysed in terms of combined root mean square (rms) hydrodynamic coefficient. The total rms coefficient is correlated with Keulegan-Carpenter number or period parameter and relative clearance of the pipeline from the plane boundary. The pipeline was subjected to Pierson-Moskowitz spectrum (P-M spectrum) in the random wave force tests. The time histories of water particle kinematics are generated using the linear numerical transforms. This paper also reports the effect of depth parameter on the total rms coefficient. The results of the random wave force tests are finally compared with those of regular waves. © 1988.