A parametric study on seakeeping assessment of fast ships in conceptual design stage

The paper presents an approach to investigate the effects of some parameters on seakeeping assessment of fast ships in conceptual design stage. Hull form parameters have been classified into two groups: main dimensions ( L, B and T) and secondary form parameters (LCB and C P). To demonstrate the approach a fast ship is redesigned as parent hull and alternative hull forms are generated by changing these parameters systematically. Some hull forms are selected related the geometric limits and seakeeping analyzes are here investigated and discussed. The obtained results are satisfactory for seakeeping predictions during the conceptual design stage. ► We generate alternative hull forms by variation of main dimensions and form parameters. ► We examine the effect of hull form parameters on seakeeping performance characteristics. ► Main dimensions have more effect on vertical plane motions than form parameters. ► LCB has not any effect on pitch motion. ► Results are valid for definite hull forms but can take initiative to develop relevant to this issue.