Improved prediction for hydrodynamic characters of SWATH ship in waves

Ming-Chung Fang, Wei June Shyu

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


In a previous study, the author finished a strip theory for predicting the motion of a SWATH ship moving freely in waves. The present paper offers an improved method for evaluating the motion response and hydrodynamic pressure distribution on the hull surface of a SWATH ship that undergoes uniform translation and oscillatory motions in waves. The hydrodynamic pressure distribution is important information as the basic input necessary for the element structural analysis for a SWATH ship design. An improved stripwise computation technique is developed to examine the resultant hydrodynamic pressure induced on the freely running SWATH ship at constant speed in waves. The corresponding information about the dynamic swell-up of the wave surface is also given. The total potentials include the effects of incident, diffraction and radiation ones and the complicate hydrodynamic interactions are also carefully treated. The effects of the surge force and viscous damping force are also included in the calculation. The results obtained here are physically reasonable; therefore, the present technique may be considered a useful tool for both fluid and structural analysis in the SWATH ship design stage.

Original languageEnglish
Pages (from-to)495-507
Number of pages13
JournalProceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering
Issue number5
Publication statusPublished - 1994 Sep 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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