Optimized Design Of Heavy And Oversize Cargo Shipping Securing Scheme In Sea Transport

Along with the development of the shipping transportation industry,the shipping transportation resources are becoming more and more tight,but the transportation cost of major cargoes is high and low profit.Under the current situation that the offshore industry emphasizes the concern of cost reduction and efficiency,it is imperative to develop the light weight and economy of marine securing work.However,the design of securing structure at home and abroad still remains at the stage of experience optimization.At the same time,the scheme safety of heavy and oversize cargo shipping transportation is the area that needs to be focused on.Nowadays,the design and safety verification of marine securing scheme has attracted the attention of shipbuilding enterprises as the structural strength and stability safety are paid more and more attention.The safety verification also has the problem of over-complicated finite element simulation and insufficient specification.Therefore,it is of certain economic value and engineering significance to check the force and optimize the structure of the rigid securing tooling for heavy and oversize cargoes in the sea transportation stage.In this paper,numerical simulation and specification are combined to decouple and optimize the whole process of securing scheme design.The main work contents and results are as follows.Due to the imperfection and inconsistency of the specifications related to securing scheme,this paper first summarizes and concludes the specifications applicable to rigid securing scheme in the process design process.For the actual production process,the design of the securing tooling mainly occurs in the production design stage.Therefore,in order to ensure the engineering efficiency,numerical simulation cannot be fully calibrated,and the force balance is the main way of securing calibration,which is also the key basis of securing scheme design in sea transport.Secondly,this paper decouples the design of securing process into two parts: force checking and structure optimization,and proposes a form of tooling suitable for securing of major cargoes according to the structural forms commonly used in actual production and construction.The force checking part adopts two algorithms,numerical simulation and specification,and proposes improvements to the two algorithms respectively,which can meet the transportation safety requirements and improve the engineering design efficiency.The simplified external force checking method summarized is used to develop auxiliary design software,which facilitates designers to simplify the calculation and reduce the overall process difficulty.The structure optimization part carries out a systematic optimization analysis based on the parametric dimensions,and optimizes the size and quantity of the tethered tooling structure by combining numerical optimization algorithm and multi-island genetic algorithm through response surface,and iteratively obtains a lightweight tooling model.Finally,the joint application based on the above two parts is carried out in this paper,and the established optimization algorithm is verified to be reasonable through example working conditions and numerical simulation,which proves that the process optimization design scheme proposed in this paper is practical and economical compared with the original scheme,and meets the structural strength limits and engineering requirements at the same time.