Hull Strength Investigation of Traditional Boat “Sandeq” Using Numerical Experiment

English

Abstract

Sandeq is an Indonesian traditional boat that is built instead of applying principal spiral design and technical calculation in its design and construction. Its construction relies on the inherited skills of the builders. This study aims to investigate the structural strength of the boat with numerical experiments by computer software that applying the finite element method (FEM). Longitudinal and transversal hull strength will be examined for four Sandeg models. The computational model of the boat hull has been designed and run with varieties of hull lengths using the software. The simulation results showed that the obtained longitudinal and transversal stresses were less than the allowable stress of the material based on the classification rules. In the transversal strength analysis, the ratio of working stress to material stress was 6,37%, 7,20%, and 5,98% on the sandeq A, B, and C respectively. As for longitudinal stress in hogging condition, the ratio was 2,77% 3,35%, 0,93%, and 0,72% on the sandeq A, B, C, and D respectively. for sagging condition, the ratio was 2,11%, 2,49%, 0,52%, and 0,69%.