The Optimization Design And Key Technology Research Of The Vessel Virtual Lifting System

With large-scale development and complication of shipbuilding, lifting of large components is increasing. Because of complex constructing environment, there are more and more collaborations of cranes, and proportion of lifting work is increasing in the whole process of shipbuilding. Under these circumstances, it is of great importance to arrange cranes overall and make plan design of lifting accurate, reasonable, efficient and reliable. Though existing virtual vessel lifting software can conduct animated simulations to lifting process, there are still some problems, for example, existing virtual vessel lifting software doesn’t consider the effect of dimensional deviation of real component in its manufacturing process on lifting technologies; existing virtual vessel lifting software has poor effects on the combination with on-site lifting operating condition and low generality; there exist some problems in the combination of existing virtual vessel lifting software and finite element simulating software.Based on three-dimensional modeling software UG and combined with Unity 3D platform and CAE analysis platform, the paper utilized secondary development technology to organically put the three together, systematically solving problems of existing lifting software. The paper undertook the following works:first, the paper got systematical design thought and specific technical route through analysis of software requirement and finished design and realization of control panel, virtual scene and model, motion simulation of lifting machinery, physics engine and collision detection on Unity 3D platform; next, the paper finished design and realization of data table of secondary development interface based on electronic spreadsheet driving mode, realizing generality of software on model and control operation; finally, focusing on a component model, the paper conducted detailed finite element calculation of its stress-strain in adjustment, distortion and welding, at the same time, the paper also conducted detailed finite element calculation of the hoisting machinery’s stress-strain, getting the result and conducting relevant mechanical analysis to it, through which the paper completed the function and realization of rest parts of virtual vessel lifting simulation platforms, including CAE analysis, model reconstruction. Besides, the paper finished system integration of different modules and the building of the whole system by utilizing secondary development technology of UG platform.The whole system realized functions of virtual vessel lifting system. Through the system, operators can finish virtual simulations of the arrangement of lifting equipment, the choice of on-site lifting apparatus, simulation of lifting process, planning of lifting path, interference checking, mechanical analysis of lifting components and other stages of lifting before the implementation of real lifting work. Compared with current virtual vessel lifting software, the system with stronger universality can better adapt to different lifting environments, fully consider basic features of different technology processes and their interactions and greatly increase simulation effect and user experience of virtual vessel lifting system.