Abstract

We present a new technique determining the form factor from resistance test results by using the sparse modeling. In the present method, the total resistance coefficient is approximated by a straight line and a high-order polynomial expression. The straight line and the high-order polynomial expression represent a viscous resistance and a wave-making resistance, respectively. The inclination of the straight line is only a function of the form factor. We determine the inclination and coefficients of the polynomial expression by means of sparse modeling. The present method is applied to some SR resistance test data under full load and ballast conditions, and the obtained form factors are in agreement with the values presented in the SR reports.

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