Development of a Design Support Methodology to Resolve Seakeeping, Resistance and Manoeuvrability Conflicts

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概要

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• The design spiral sequentially seeks through iteration the modification of a design to accommodate the desired carrying capacity at a preferred speed within an economic, commercial and operational framework. One aspect of operational design is the reduction of calm water resistance and control of involuntary and voluntary speed reductions in a seaway, within the laws of nature and the aims and objectives for the design. Assessment (simple or sophisticated) of a design can be partially undertaken by theoretical analysis. In 'forward' analysis one assumes the description of the design is sufficient (albeit approximate) to allow assessment of the frictional and wave making resistance, the seakeeping responses in a seaway and hence the added resistance. Criteria in the form of behavioural thresholds can then be used to assess the extent of voluntary speed reductions as a function of sea-state. Removal of undesirable characteristics or seeking balanced workable responses requires modification of the hull wetted surface shape. Beneficial hull form changes may be identified through practical design experience per se and/or computer generated experience pertinent to the specific design using 'design charts' or 'inverse' analysis methods. Design charts and inverse analysis requires geometry transformation and manipulation capability to facilitate the identification of possible beneficial hull form changes. Measurement of the level of improvement requires appropriate representative metrics of the different fluid-structure interactions to be assessed. In this paper methods originally developed successfully for simultaneously resolving the conflicts between seakeeping and resistance assessments are extended to include manoeuvrability, whilst also being sensitive to known difficulties with the IMO interim manoeuvrability standards. This necessitates generating objective functions with sufficient sensitivity to identify beneficial changes without unreasonable domination by any one aspect of the assessment process.

• 社団法人日本船舶海洋工学会の論文
• 2000-09-04

著者

• Hearn Grant

  University Of Newcastle Upon Tyne

• Furukawa Yoshitaka

  Faculty Of Engineering Kyushu University

• KIJIMA Katsuro

  Faculty of Engineering, Kyushu University

• Kijima K

  Faculty Of Engineering Kyushu University

• Kijima Katsuro

  Faculty Of Engineering Kyushu University

関連論文

• Development of a Design Support Methodology to Resolve Seakeeping, Resistance and Manoeuvrability Conflicts
• 3. Manoeuvrability of Ships in Narrow Waterway
• On the Ship Manoeuvring Characteristics in Shallow Water
• 8. Wind Effect on Course Stability of Two Towed Vessels

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