Experimental Study of the Dynamic Performance of Steel Catenary Riser within the Touchdown Zone

This study proposed a novel experimental platform to conduct dynamic loading tests of truncated model steel catenary riser (SCR) within the touchdown zone (TDZ). The facilities platform, including soil tank, system, and stirring were introduced in detail. parameters test determined through simulation an situ riser. A pipe was adopted as riser, with its outer diameter equaling that prototype SCR. Before executing loadings, developed static configuration under submerged weight applied bending moment. Subsequently, cyclic vertical lateral displacement loads point. results showed when amplitude increased from 200 mm 300 mm, stress ranges at front by more than 100%, whereas range only differed less 5% different periods. Numerical models SCR built based on vector form intrinsic finite element (VFIFE) method. High similarities between proved reliability nonlinear numerical model. During test, seabed trench depth 0.71 D width 0.48 D, shape similar trench.