Research On Load Adjustment Simulation Technology Of Blue Whale Floating Crane Craft

During the exploitation of ocean resources,large equipment was usually used,whose transportation,installation,maintenance and disassembly were dependent on the floating crane.With the wide use of floating crane in actual conditions,in order to ensure the safety,efficiency in the construction process and the economy in the process of training crew,the studies about the simulation of floating crane were gradually in-depth.In this study,the simulation system of ballast water adjustment in the operation of Blue Whale' floating crane was deeply studied.This system simulated the flow rate changes of each tube and cabin of the pipe network system when ballast water adjustment was proceeded by floating crane in real-time,which could offset the overturning moment caused by Lifting operation and Keep the stability of the floating state within the safe range.In this study,on the basis of summarizing and analyzing the operation characteristics of Blue Whale' floating crane under different operating modes,we deeply studied the changes of buoyancy and stability during construction process.Then,the calculation procedures of buoyancy and stability in the simulation system of ballast water adjustment were designed and determined,and meanwhile was verified by the standard of classification society.On the problems which were automatically generated from the adjustment program of simulation system,the advantages and limitations of Particle swarm optimization(PSO)were analyzed and summarized based on the study of the exsting automatic adjustment algorithm.Here,a Multi-objective reduction particle swarm optimization algorithm(MORAPSO)was proposed,which was used in the automatic adjustment of floating crane.Additionally,after comparative analysis of optimal solution for objective function before and after improvement,it was proved that MORAPSO possessed some advantages.Moreover,concerning the problem of solving ballast flow rate,on the basis of summarizing and analyzing the characteristics of ballast water pipe network,the finite element method was used to establish the mathematical model of ballast water pipe network,and matrix-split method was used to solve the flow and pressure matrix equations of each pipe network.Furthmore,the flow values were applied in the real case and was calculated,which was compared with the resuts calculated by water resources software EPANET.Collectively,finite element method was proved to be feasible.Finally,according to the development environment of ballast water load adjustment simulation system,a complete set of ballast water load adjustment simulation software is developed for the system function and system module structure.The experimental data are compared with the real data of the floating crane craft under the corresponding operating conditions,and the error of the data is kept within the allowable range.Moreover,the system can monitor the relevant data of each ballast tank in real time and automatically generate the ballast water adjustment and optimization scheme according to different working conditions.