Pages 25-32
A variety of applications of nonlinear programming to ship form design have recently been made. The authors have also worked on shape optimization problem for minimizing viscous resistance of 2-dimensional body by combining Computational Fluid Dynamics and the nonlinear programming. This paper provides an improvement of the method of sensitivity analysis for obtaining the resistance variance due to the deformation of an original body shape, which is represented by using B-spline function. The point of the improvement is to evaluate an additional linear term in the expression of the resistance sensitivity with respect to the design variable, which has been neglected in the existing methods. The results of a few examples of the optimized shape and the detailed analysis on the distribution of the sensitivity coefficient components demonstrate the validity of the present method.
