심해저 무한궤도차량의 확률론적 설계를 위한 해저면 전단강도 확률분포 추정

Abstract

The probability distribution of the shear strength at seafloor sediment is estimated in order to use the estimated distribution in reliability analysis on mobility of a tracked vehicle for deep-sea manganese nodule mining. The probability distribution of the shear strength at KR5 area is parametrically and nonparametrically estimated. In parametric estimation, the 65 uni-modal candidates distributions are selected and the best distribution is determined by Kolmogorov-Smirnov test(K-S test). In nonparametric estimation, piecewise linear estimation(PLE), kernel density estimation (KDE), and PLE in body and generalized Pareto distribution in tail (PLE/GPD) are compared and the best fit is determined by K-S test. Finally, the best distributions in parametric and nonparametric estimation are compared and best of best distribution is chosen as PLE or PLE/GPD.