MOORING OF SURFACE VESSELS TO PIERS

This paper presents a new analytical method of determining the tension forces in mooring lines of surface vessels. This method will aid the ship designer in developing fixed mooring systems with more accuracy than in the past. The analytical model developed considers the hull to be rigid and restrained broadside to a shallow water pier with resulient fenders in use. The approach to the problem involves: a. Determination of wind, current, and equivalent static wave forces at specified headings; b. Calculation of buoyant restoring forces caused by trim, heel and immersion of the hull; c. Derivation of a combined mooring line stiffness matrix in terms of direction angles, lengths, cross-sectional properties, and nonlinear modulus of elasticity; d. Derivation of generalized stiffness matrix for fixed mooring system; determination of tension forces in mooring lins using matrix algebra procedure and incremental load method. Special emphasis is placed on the cumulative elastic behavior of the mooring lines and on the manner in which the elasticity of the lines controls the vessel movement.

Supplemental Notes:
- Presented at Hampton Roads SNAME Meeting, January 25, 1978.
Corporate Authors:
Society of Naval Architects and Marine Engineers

601 Pavonia Avenue
Jersey City, NJ United States 07306-2907
Authors:
- Chernjawski, P E
Publication Date: 1978

Media Info

Features: References;
Pagination: 27 p.

Subject/Index Terms

TRT Terms: Dynamic loads; Force; Mooring; Mooring cables; Moorings; Navigation; Ocean currents; Piers (Supports); Piers (Wharves); Stiffness matrix; Waves
Old TRIS Terms: Current forces; Moored vessels; Shallow water effects; Stiffness matrices; Wave forces on structures; Wind forces on structures
Subject Areas: Hydraulics and Hydrology; Marine Transportation; Terminals and Facilities;

Filing Info

Accession Number: 00173927
Record Type: Publication
Source Agency: Society of Naval Architects and Marine Engineers
Files: TRIS
Created Date: May 3 1978 12:00AM