The Bulk Carrier Of 80000 DWT Ice Navigation Finite Element Strength Analysis

Accompanied by the increasing expansion of maritime trade, the demands for ice-strengthened vessels continue to increase. The structural strength of the ice-sailing ship, in addition to strength requirements of the specification of the general ship, must also meet the corresponding ice-class classification society regulations strengthen the requirements. Hull structural analysis has certain drawbacks and limitations based on the hull beam theory and the empirical formula, In this paper, the sea conditions is ice formation, Strength check of the cabin model also can not meet the voyage the ships ice model requires the establishment of the entire ship model calculation and analysis of practical significance.The finite element method is a universal numerical method, has been widely used in the marine sector, The major classification societies have been forced to use the finite element method calculation of the analysis of the hull strength. With the development of computer hardware, rib and aggregate spacing, finite element modeling for modeling the whole ship is not difficult; however, due to the hull structure is complex, involving many factors, the relatively large workload.This paper takes a 80000DWT bulk carrier as an example to have a research on navigation in ice District. The bulk carriers with multiple tanks, double bottom, double side structure. Seagoing Steel Ships "(2006) and revised annually file navigation in ice area to strengthen section and The bulk carrier structure calculation and analysis Guide "(2003) design ice load, ice with a regional breakdown of the ice with a minimum thickness of the outer plate solution and boundary conditions for finite element calculation. Using finite element software Patran / Nastran to establish a three-dimensional model of the entire ship, and solving calculation; calculations show that the side ice band and the deck is the stress concentration region, beyond the ordinary steel yield strength of this region using high-strength steel is necessary.Ship icing is more common maritime disasters, and to consider the factors of pressure waves droplets plot ice and wind, waves droplet icing sport mode, Calculate the amount of ice accretion, Calculate the amount of ice accretion,and horizontal distribution of the ship, the calculation shows, the greater the wind speed, the speed of the lower ice accretion increases the amount of the sailing ship is a small top angle will reduce the amount of ice accretion. Summarizing the above analysis, deepen the understanding of wave droplet icing hazards, there are certain guiding significance and reference value to assess ice sailing ship hull strength.