Dynamic Analysis for the Design of CALM System in Shallow and Deep Waters

Author:

Hwang Y.-L.1

Affiliation:

1. IMODCO, Inc., 27001 Agoura Road, Suite 350, Calabasas Hills, CA 91301-5359

Abstract

Abstract This paper presents a time domain analysis approach to evaluate the dynamic behavior of the catenary anchor leg mooring (CALM) system under the maximum operational condition when a tanker is moored to the terminal, and in the survival condition when the terminal is not occupied by a tanker. An analytical model, integrating tanker, hawser, buoy, and mooring lines, is developed to dynamically predict the extreme mooring loads and buoy orbital motions, when responding to the effect of wind, current, wave frequency, and wave drift response. Numerical results describing the dynamic behaviors of the CALM system in both shallow and deepwater situations are presented and discussed. The importance of the line dynamics and hawser coupled buoy-tanker dynamics is demonstrated by comparing the present dynamic analysis with catenary calculation approach. Results of the analysis are compared with model test data to validate the mathematical model presented.

Publisher

ASME International

Subject

Mechanical Engineering,Ocean Engineering

Reference18 articles.

1. ABS, 1995, “Rule for Building and Classing Single Point Moorings,” Vol. IV, Oct. Draft, American Bureau of Shipping.

2. Faltinsen, O. M., and Michelson, F. C., 1974, “Motions of Large Structures in Waves at Zero Froude Number,” Paper 11, International Symposium on the Dynamics of Marine Vehicles and Structures in Waves, London, U.K.

3. Faltinsen, O. M., Kjaerland, O., Liapis, N., and Walderhaug, H., 1979, “Hydrodynamic Analysis of Tankers at Single-Point-Mooring System,” Second International Conference on Behaviour of Offshore Structures, Paper No. 59, London, U.K.

4. Flory, J. F. and Poranski, P. F., 1977, “The Design of Single Point Moorings,” OTC 2827, Houston, TX.

5. Garrison, C. J., 1978, “Hydrodynamic Loading of Large Offshore Structures: Three-Dimensional Source Distribution Methods,” Chap. 3, Numerical Methods in Offshore Engineering, John Wiley & Sons, New York, NY, pp. 87–140.

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. An Analytical Solution of Wave Exciting Loads on CALM Buoy with Skirt;Applied Mechanics and Materials;2013-12

2. Second-Order Low-Frequency Wave Forces on a SPM Offloading Tanker in Shallow Water;Journal of Offshore Mechanics and Arctic Engineering;2009-10-01

3. A coupled approach for dynamic analysis of CALM systems;Applied Ocean Research;2002-02

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