Nonlinear Dynamic Analysis of a Submerged Hose Using Co-rotational Formulation

Abstract

Flexible hoses are used in several engineering operations, specially in the offshore industry, they are used to transfer liquid products between FPSO’s and also are present in some riser configurations. These hoses undergoes large deformations with small strains, to model this behavior the corotational formulation is implemented along the Newmark integration operator with Newton-Raphson iterations to obtain the nonlinear dynamic equilibrium response. The analysis is divided in two stages; static analysis, to obtain the static configuration when dead loads are applied; and dynamic analysis to obtain the response of the system to time-dependent loads. This two stages are coupled and the dynamic response of a hose under time-varying displacement is simulated.