Seakeeping analysis for preliminary design （耐波性分析来初步设计）.pdfVIP

Seakeeping analysis for preliminary design P. Couser, Formation Design Systems Summary Seakeeping performance is becoming of increasing importance. With fast computers and sophisticated software readily available to designers, it is now possible for a vessels seakeeping characteristics to be addressed much earlier in the design spiral. Regulatory bodies and operators are becoming increasingly aware of the importance of specifying seakeeping requirements which the vessel must meet. The software tools described in this paper will help designers address these issues. This paper gives a brief overview of what analysis techniques are available and gives a simple example of how the seakeeping performance of alternative designs may be compared. Introduction In recent years, greater attention has been given to vessels’ seakeeping characteristics. This is due to a number of factors: proliferation of high-speed semi-displacement passenger vessels; increasing demand for passenger comfort (passengers are often able to vote with their feet by taking alternative transport, e.g. English Channel Tunnel); deployment of increasingly sophisticated systems on ever smaller naval vessels (Hunt 1999); greater pressure from regulatory bodies and the broader public for safer vessels; staggering advancements in desktop computer power; and developments in prediction and analysis tools. The birth of modern seakeeping analysis was in the mid 20th Century as demonstrated by the landmark papers of Ursell (1949a,b), and St Denis and Pierson (1953). Continual refinements of analysis methods and mathematical techniques, combined with the availability of high performance desktop computers in the late 20th Century has made routine seakeeping analysis possible in all design offices. Analysis of a vessel’s seakeeping characteristics can now take its rightful place in the overall design spiral — how oft