engleski

HULL STRUCTURE ANALYSIS OF BULK CARRIER-ROJECT 972, DOUBLE BOTTOM DESIGN - PARAMETRIC STUDY - Technical Report

Parametric study w.r.t. the number and spacing of longitudinals in double bottom structure of bulk carrier-project 972 is performed at the request of the Yard. Botom girder position is changed due to modifications in number of longitudinals between them. Three bottom structure variants supplied by the Yard (PROPOSAL 1, PROPOSAL 2 and PROPOSAL 3) are investigated. 3D FEM MAESTRO model of each variant for the critical structural holds is generated in accordance with ABS recommendations. 3D FEM model has approximately 77 570 DOF and 9340 macro- elements. Four hogging loadcases : LC2, 4, 6 and 8 from ABS Rules are generated using given weight distribution and adjusted to the required bending moment distribution. This report describes results (stresses and adequacy parameters) obtained after completing analysis for specified loadcases for all three structural variants. Results enabling selection of optimal structural layout for double bottom are given.

Bulk carrier; finite elements; MAESTRO modeling; parametric study of double bottom

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