Lateral Stability of a Flexible Submarine Hoseline
Abstract
The lateral stability of a submarine hoseline in a slowly varying current is investigated. If the current force overcomes the sea resistance, the hose segment is assumed to slide on the bottom without twisting. The stability is evaluated in terms of lateral deflections, hose tensions, and anchor loads. The behavior of a hoseline in a variable current is simulated based on nonlinear cable-like response to lift and Morison-type drag forces. Principles and the numerical algorithm of the simulation model are briefly summarized. A parametric analysis is conducted to study the influence on the hose response of the physical parameters considered in the simulation model. The results indicate that, for a practical hoseline, the most critical parameters are: the segment length-to-span ratio, the axial rigidity of the hose, the hose size, and the current velocity. The sea bottom resistance is negligible from a design point of view. Keywords: Underwater pipelines.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1989
- Accession Number
- ADA219251
Entities
People
- J. W. Leonard
- T. S. Huang
Organizations
- Naval Facilities Engineering Service Center