Container Ship's Structure Optimum Design Method Based On Structural Reliability

Along with the fast growth of the global trade, the container transportation with the characteristic of high efficiency and convenience gradually seizes the market and becomes the mainstream of the shipping industry. But the torsional rigidity reduces due to the structure feature of the container itself. So conducting the structure research and ensuring the safe operation becomes the urgent matter and also the significance of the essay.In view of the fact that the traditional safe-factor is inherent in the structure research, the paper introduces the concept of the structure reliability and increases the target of the structure reliability under the foundation of the traditional restraint condition. Thereby the research becomes more scientific and reasonable.This paper, pursuing minimum weight, establishes transverse sectional mechanics model, set up the design variables deciding weight, divides the container's holds into cells along the ship's length and calculates stress distributing to check safety by bow and rear boundary conditions.This paper provides the global optimization distribution section evolutionary algorithm. This algorithm has strong searching ability and high precision. Also it can be easily programmed and convenient for transplanting. So it has the widespread serviceability as well as the good development prospect. The C program about the evolutionary algorithm is modularized. These modules haven't business with each other and the modification won't influence another. The result indicates that the algorithm can apply the structural optimization about ship, and can obtain very good optimized result.