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International Shipbuilding Progress - Volume 28, issue 326

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Price: EUR 95.00
ISSN 0020-868x (P)
ISSN 1566-2829 (E)

Impact Factor 2024: 0.6

The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year two issues appear (in March and September). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as:

  • - Concept development
    - General design of ships and offshore objects
    - Ship and offshore structural design
    - Hydro-mechanics and -dynamics
    - Maritime engineering and machinery systems
    - Production processes of all types of ships and other objects intended for marine use
    - Production technology and material science
    - Shipping science, economics, and all directly related subjects
    - Ship operations
    - Offshore and ocean engineering in relation to the marine environment
    - Marine safety
    - Efficiency, lifecycle, and  environment
    - Ice-related aspects for ships and offshore objects.

  • The contents of the papers may be of a fundamental or of an applied scientific nature and must be of the highest novelty and rigor.

Describing-function analysis of slow-drift oscillations of vessels moored in random-sea conditions

Authors: Flower, J.O.

Article Type: Research Article

Abstract: Slow-drift oscillations of moored vessels in the open sea have become a topic of some importance in recent years. In this study we make use of the describing-function technique, which has been well-developed and much used in the analysis of nonlinear control systems, to deal with the dynamical equations representing probabilistic surge motion of vessels moored in random-sea conditions. Before the illustrations of this method of solution we outline the elegant mathematical approach to this problem by Roberts [1], some of whose results concerning the treatment of wave-forces we incorporate in the describing-function approach.

DOI: 10.3233/ISP-1981-2832601

Citation: International Shipbuilding Progress, vol. 28, no. 326, pp. 224-233, 1981

Price: EUR 27.50

Ultraharmonics and subharmonics in the rolling motion of a ship: Steady-state solution

Authors: Cardo, A. | Francescutto, A. | Nabergoj, R.

Article Type: Research Article

Abstract: In the present paper the rolling motion of a ship with particular regard to the nonlinearity phenomena is examined. The behaviour in a regular beam sea is studied in cases where the encounter frequency is an integer-multiple or a sub-multiple of the natural frequency of the system. The approximate analysis of the equation of motion, carried out with the Bogohubov-Krylov-Mitropolsky asymptotic method, shows that, apart from the synchronism, other resonance regions typical of nonlinear systems also exist. It deals with resonances of higher order, called ultraharmonic and subharmonic respectively. The origin of such phenomena is to be sought in … Show more

DOI: 10.3233/ISP-1981-2832602

Citation: International Shipbuilding Progress, vol. 28, no. 326, pp. 234-251, 1981

Price: EUR 27.50
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